Elliot R McVeigh

Summary

Affiliation: National Institutes of Health
Country: USA

Publications

  1. pmc Real-time interactive MRI-guided cardiac surgery: aortic valve replacement using a direct apical approach
    Elliot R McVeigh
    Laboratory of Cardiac Energetics, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland 20892 1061, USA
    Magn Reson Med 56:958-64. 2006
  2. pmc Magnetic resonance fluoroscopy allows targeted delivery of mesenchymal stem cells to infarct borders in Swine
    Alexander J Dick
    Cardiovascular Branch, Clinical Research Program, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Building 10, Room 2c713, Bethesda, MD 20892 1538, USA
    Circulation 108:2899-904. 2003
  3. doi request reprint Fully automatic, retrospective enhancement of real-time acquired cardiac cine MR images using image-based navigators and respiratory motion-corrected averaging
    Peter Kellman
    Laboratory of Cardiac Energetics, National Heart, Lung and Blood Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland, USA
    Magn Reson Med 59:771-8. 2008
  4. pmc Real-time catheter-directed MRA with effective background suppression and persistent rendering
    Michael A Guttman
    Laboratory of Cardiac Energetics, National Institutes of Health, National Heart, Lung and Blood Institute, Bethesda, Maryland 20892 1061, USA
    J Magn Reson Imaging 28:538-42. 2008
  5. pmc Mitral cerclage annuloplasty, a novel transcatheter treatment for secondary mitral valve regurgitation: initial results in swine
    June Hong Kim
    Translational Medicine Branch, Division of Intramural Research, National Heart Lung and Blood Institute, NIH, Bethesda, MD 20892 1538, USA
    J Am Coll Cardiol 54:638-51. 2009
  6. pmc Interventional cardiovascular procedures guided by real-time MR imaging: an interactive interface using multiple slices, adaptive projection modes and live 3D renderings
    Michael A Guttman
    Laboratory of Cardiac Energetics, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland 20892 1061, USA
    J Magn Reson Imaging 26:1429-35. 2007
  7. pmc Single heartbeat cardiac tagging for the evaluation of transient phenomena
    Daniel A Herzka
    Department of Biomedical Engineering, Johns Hopkins University School of Medicine Baltimore, Maryland 20892 1061, USA
    Magn Reson Med 54:1455-64. 2005
  8. pmc Visualization of active devices and automatic slice repositioning ("SnapTo") for MRI-guided interventions
    Ashvin K George
    Translational Medicine Branch, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland, USA
    Magn Reson Med 63:1070-9. 2010
  9. pmc Whole shaft visibility and mechanical performance for active MR catheters using copper-nitinol braided polymer tubes
    Ozgur Kocaturk
    Translational Medicine Branch, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD, USA
    J Cardiovasc Magn Reson 11:29. 2009
  10. pmc T2* measurement during first-pass contrast-enhanced cardiac perfusion imaging
    Peter Kellman
    Laboratory of Cardiac Energetics, National Heart, Lung and Blood Institute, National Institutes of Health, DHHS, Bethesda, Maryland 20892 1061, USA
    Magn Reson Med 56:1132-4. 2006

Collaborators

Detail Information

Publications79

  1. pmc Real-time interactive MRI-guided cardiac surgery: aortic valve replacement using a direct apical approach
    Elliot R McVeigh
    Laboratory of Cardiac Energetics, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland 20892 1061, USA
    Magn Reson Med 56:958-64. 2006
    ..MRI-guided beating-heart surgery may provide patients with a less morbid and more durable solution to structural heart disease...
  2. pmc Magnetic resonance fluoroscopy allows targeted delivery of mesenchymal stem cells to infarct borders in Swine
    Alexander J Dick
    Cardiovascular Branch, Clinical Research Program, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Building 10, Room 2c713, Bethesda, MD 20892 1538, USA
    Circulation 108:2899-904. 2003
    ..We tested the ability to (1) identify infarcts, (2) navigate injection catheters to preselected targets, (3) inject safely even into fresh infarcts, and (4) confirm injection success immediately...
  3. doi request reprint Fully automatic, retrospective enhancement of real-time acquired cardiac cine MR images using image-based navigators and respiratory motion-corrected averaging
    Peter Kellman
    Laboratory of Cardiac Energetics, National Heart, Lung and Blood Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland, USA
    Magn Reson Med 59:771-8. 2008
    ..Motion-corrected averaging of real-time acquired cardiac images provides a means of attaining high-quality cine images with many of the benefits of real-time imaging, such as free-breathing acquisition and tolerance to arrhythmias...
  4. pmc Real-time catheter-directed MRA with effective background suppression and persistent rendering
    Michael A Guttman
    Laboratory of Cardiac Energetics, National Institutes of Health, National Heart, Lung and Blood Institute, Bethesda, Maryland 20892 1061, USA
    J Magn Reson Imaging 28:538-42. 2008
    ..To develop an imaging and visualization technique for real-time magnetic resonance angiography (rtMRA) fully integrated with a real-time interactive imaging environment on a clinical MR scanner...
  5. pmc Mitral cerclage annuloplasty, a novel transcatheter treatment for secondary mitral valve regurgitation: initial results in swine
    June Hong Kim
    Translational Medicine Branch, Division of Intramural Research, National Heart Lung and Blood Institute, NIH, Bethesda, MD 20892 1538, USA
    J Am Coll Cardiol 54:638-51. 2009
    ..We developed and tested a novel transcatheter circumferential annuloplasty technique to reduce mitral regurgitation in porcine ischemic cardiomyopathy...
  6. pmc Interventional cardiovascular procedures guided by real-time MR imaging: an interactive interface using multiple slices, adaptive projection modes and live 3D renderings
    Michael A Guttman
    Laboratory of Cardiac Energetics, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland 20892 1061, USA
    J Magn Reson Imaging 26:1429-35. 2007
    ..To develop and test a novel interactive real-time MRI environment that facilitates image-guided cardiovascular interventions...
  7. pmc Single heartbeat cardiac tagging for the evaluation of transient phenomena
    Daniel A Herzka
    Department of Biomedical Engineering, Johns Hopkins University School of Medicine Baltimore, Maryland 20892 1061, USA
    Magn Reson Med 54:1455-64. 2005
    ..Images acquired during the Valsalva maneuver demonstrated apparent beat-to-beat variability, visible both in the images and as changing strain patterns and ventricular volumes...
  8. pmc Visualization of active devices and automatic slice repositioning ("SnapTo") for MRI-guided interventions
    Ashvin K George
    Translational Medicine Branch, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland, USA
    Magn Reson Med 63:1070-9. 2010
    ..CurveFind is typically able to reconstruct the device curve, with an average error of approximately 2 mm, even in the case of complex geometries...
  9. pmc Whole shaft visibility and mechanical performance for active MR catheters using copper-nitinol braided polymer tubes
    Ozgur Kocaturk
    Translational Medicine Branch, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD, USA
    J Cardiovasc Magn Reson 11:29. 2009
    ..We explored the impact of braid material designs on radiofrequency and mechanical performance...
  10. pmc T2* measurement during first-pass contrast-enhanced cardiac perfusion imaging
    Peter Kellman
    Laboratory of Cardiac Energetics, National Heart, Lung and Blood Institute, National Institutes of Health, DHHS, Bethesda, Maryland 20892 1061, USA
    Magn Reson Med 56:1132-4. 2006
    ..For single-dose Gd-DTPA (0.1 mmol/kg at 5 ml/s), the LV blood pool T(2) (*) had a mean value of 9 ms (N = 10) at peak enhancement. Distortion of the AIF due to T(2) (*) signal intensity loss will be less than 10% using TE = 0.6 ms...
  11. doi request reprint High spatial and temporal resolution cardiac cine MRI from retrospective reconstruction of data acquired in real time using motion correction and resorting
    Peter Kellman
    Laboratory of Cardiac Energetics, National Heart, Lung and Blood Institute, National Institutes of Health, DHHS, Bethesda, Maryland 20892 1061, USA
    Magn Reson Med 62:1557-64. 2009
    ..s.). Motion-corrected averaging of real-time acquired cardiac images provides a means of attaining high-quality cine images with many of the benefits of real-time imaging, such as free-breathing acquisition and tolerance to arrhythmias...
  12. pmc The visceral pericardium: macromolecular structure and contribution to passive mechanical properties of the left ventricle
    Paul D Jobsis
    National Heart, Lung, and Blood Institute, National Institutes of Health, MSC 1061, 9000 Rockville Pike, Bethesda, MD 20892, USA
    Am J Physiol Heart Circ Physiol 293:H3379-87. 2007
    ..Alterations in this layer may occur in various disease states that effect diastolic function...
  13. pmc Reduced field of view and undersampled PR combined for interventional imaging of a fully dynamic field of view
    Dana C Peters
    Laboratory of Cardiac Energetics, NHLBI, National Institutes of Health, DHHS, Bethesda, Maryland, USA
    Magn Reson Med 51:761-7. 2004
    ..The near doubling of temporal resolution that is possible with PR rFOV permits accurate monitoring of highly dynamic events, such as catheter movements, and arrhythmias, such as ventricular ectopy...
  14. pmc Real-time MRI guided atrial septal puncture and balloon septostomy in swine
    Amish N Raval
    Cardiovascular Branch, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland 20892 1538, USA
    Catheter Cardiovasc Interv 67:637-43. 2006
    ..Septostomy achieved a mean left to right shunt ratio of 1.3:1 in these healthy animals. Interactive rtMRI permits rapid transcatheter ASP and BAS in swine. Further technical development may enable novel applications...
  15. ncbi request reprint Motion corrected free-breathing delayed-enhancement imaging of myocardial infarction using nonrigid registration
    Maria J Ledesma-Carbayo
    Laboratory of Cardiac Energetics, National Heart, Lung and Blood Institute, National Institutes of Health, DHHS, Bethesda, Maryland 20892 1061, USA
    J Magn Reson Imaging 26:184-90. 2007
    ..To develop and test an automatic free-breathing, delayed enhancement imaging method with improved image signal-to-noise ratio (SNR)...
  16. pmc Motion-corrected free-breathing delayed enhancement imaging of myocardial infarction
    Peter Kellman
    Laboratory of Cardiac Energetics, National Heart, Lung, and Blood Institute, National Institutes of Health, DHHS, 10 Center Drive, MSC 1061, Building 10, Room B1D416, Bethesda, MD 20892, USA
    Magn Reson Med 53:194-200. 2005
    ..In this study, motion correction was implemented using image registration postprocessing rather than navigator correction of individual frames. Navigator techniques may be incorporated as well...
  17. pmc High-resolution 3D arteriography of chronic total peripheral occlusions using a T1-W turbo spin-echo sequence with inner-volume imaging
    Smita Sampath
    Laboratory of Cardiac Energetics, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, DHHS, Bethesda, Maryland 20892 1061, USA
    Magn Reson Med 57:40-9. 2007
    ..Delineation of the vascular architecture, including contrast differences between the patent and occluded artery segments, and lesion morphology heterogeneity were visualized...
  18. pmc Undersampled projection reconstruction for active catheter imaging with adaptable temporal resolution and catheter-only views
    Dana C Peters
    Laboratory of Cardiac Energetics, National Institutes of Health, Bethesda, Maryland 20892 0161, USA
    Magn Reson Med 49:216-22. 2003
    ..Briefly toggling on catheter-only projection images was valuable for verifying that the catheter tip was contained within the selected slice, or for locating the catheter when part of it was outside the selected slice...
  19. ncbi request reprint Parallelized hybrid TGRAPPA reconstruction for real-time interactive MRI
    Haris Saybasili
    NHLBI, National Institutes of Health, DHHS, Bethesda, MD, USA
    Med Image Comput Comput Assist Interv 11:163-70. 2008
    ..The computation was parallelized and implemented on a general purpose multi-core architecture. Reconstruction speeds of 65-70 frames per second were achieved with a matrix of 192 x 144 with 15 coils...
  20. pmc Antegrade percutaneous closure of membranous ventricular septal defect using X-ray fused with magnetic resonance imaging
    Kanishka Ratnayaka
    Translational Medicine Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland 20892 1538, USA
    JACC Cardiovasc Interv 2:224-30. 2009
    ....
  21. pmc Hemodynamic improvement in cardiac resynchronization does not require improvement in left ventricular rotation mechanics: three-dimensional tagged MRI analysis
    Hiroshi Ashikaga
    Laboratory of Cardiac Energetics, National Heart, Lung, and Blood Institute NIH, Bethesda, MD 20892, USA
    Circ Cardiovasc Imaging 3:456-63. 2010
    ..Earlier studies have yielded conflicting evidence on whether or not cardiac resynchronization therapy (CRT) improves left ventricular (LV) rotation mechanics...
  22. pmc Real-time blood flow imaging using autocalibrated spiral sensitivity encoding
    Reza Nezafat
    Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland 20892 1061, USA
    Magn Reson Med 54:1557-61. 2005
    ..Real-time experiments were performed to measure blood velocity in the ascending aorta and aortic valve, and during a Valsalva maneuver. The results demonstrate the potential of this technique for real-time flow imaging...
  23. pmc Real-time magnetic resonance-guided endovascular repair of experimental abdominal aortic aneurysm in swine
    Venkatesh K Raman
    Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute NIH, Building 10, Rm 2C713, Bethesda, MD 20892 1538, USA
    J Am Coll Cardiol 45:2069-77. 2005
    ....
  24. pmc Real-time magnetic resonance imaging-guided endovascular recanalization of chronic total arterial occlusion in a swine model
    Amish N Raval
    Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20892 1538, USA
    Circulation 113:1101-7. 2006
    ..Alternatively, MRI may delineate the artery within the occluded segment to enhance procedural safety and success. We hypothesized that real-time MRI (rtMRI)-guided CTO recanalization can be accomplished in an animal model...
  25. pmc Multi-contrast delayed enhancement provides improved contrast between myocardial infarction and blood pool
    Peter Kellman
    Laboratory of Cardiac Energetics, National Heart, Lung and Blood Institute, National Institutes of Health, DHHS, Bethesda, Maryland 20892 1061, USA
    J Magn Reson Imaging 22:605-13. 2005
    ..To develop and test a delayed-enhancement imaging method for improving the contrast between myocardial infarction (MI) and blood pool...
  26. ncbi request reprint Unsupervised estimation of myocardial displacement from tagged MR sequences using nonrigid registration
    Maria J Ledesma-Carbayo
    Laboratory of Cardiac Energetics, National Heart, Lung and Blood Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland 20892 1061, USA
    Magn Reson Med 59:181-9. 2008
    ..40 pixels (0.19 mm) in the experimental data and 0.52 pixels (0.56 mm) in the volunteer data. These results confirm the subpixel accuracy achieved using the proposed methodology...
  27. pmc Measurement of kinetic parameters in skeletal muscle by magnetic resonance imaging with an intravascular agent
    Anthony Z Faranesh
    Laboratory of Cardiac Energetics, National Heart, Lung, and Blood Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland, USA
    Magn Reson Med 55:1114-23. 2006
    ..7+/-2.2 vs. 8.5+/-1.6%) were not found to be significant. These results demonstrate that relevant physiological metrics can be calculated in skeletal muscle using MRI with an intravascular contrast agent...
  28. pmc Phased array ghost elimination
    Peter Kellman
    Laboratory of Cardiac Energetics, National Institutes of Health, National Heart, Lung and Blood Institute, Bethesda, MD 20892 1061, USA
    NMR Biomed 19:352-61. 2006
    ..The more general scheme may be used to modulate each EPI ghost image to a separate temporal frequency as described in this paper...
  29. pmc Image reconstruction in SNR units: a general method for SNR measurement
    Peter Kellman
    Laboratory of Cardiac Energetics, National Heart, Lung and Blood Institute, National Institutes of Health, DHHS, Bethesda, Maryland 20892 1061, USA
    Magn Reson Med 54:1439-47. 2005
    ..The procedure includes scaling for noise equivalent bandwidth of digital receivers, FFTs and associated window functions (raw data filters), and array combining...
  30. pmc X-ray fused with magnetic resonance imaging (XFM) to target endomyocardial injections: validation in a swine model of myocardial infarction
    Ranil de Silva
    Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20892 1538, USA
    Circulation 114:2342-50. 2006
    ..We tested the accuracy of XFM using external fiducial markers to guide endomyocardial cell injections in infarcted swine hearts...
  31. pmc Measurement of skeletal muscle perfusion during postischemic reactive hyperemia using contrast-enhanced MRI with a step-input function
    Richard B Thompson
    Laboratory of Cardiac Energetics, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland, USA
    Magn Reson Med 54:289-98. 2005
    ..4% from tissue relaxometry studies. Bulk blood flow studies in the same volunteers using phase-contrast velocimetry (popliteal artery) yielded significantly lower flow values, but with a correlation coefficient R2 = 0.62 and P = 0.004...
  32. pmc Real-time volume rendered MRI for interventional guidance
    Michael A Guttman
    Laboratory of Cardiac Energetics, National Institutes of Health, National Heart, Lung and Blood Institute, 10 Center Dr, Building 10, Room B1D416, Bethesda, MD 20892 1061, USA
    J Cardiovasc Magn Reson 4:431-42. 2002
    ..The system is described and some interventional application examples are shown. To view movies of some of the examples, enter the following address into a web browser: http://nhlbi.nih.gov/labs/papers/lce/guttman/rtvolmri/index/htm...
  33. pmc Real-time MR imaging-guided laser atrial septal puncture in swine
    Abdalla A Elagha
    Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD 20892 1538, USA
    J Vasc Interv Radiol 19:1347-53. 2008
    ....
  34. pmc T2-prepared SSFP improves diagnostic confidence in edema imaging in acute myocardial infarction compared to turbo spin echo
    Peter Kellman
    Laboratory of Cardiac Energetics, National Heart, Lung and Blood Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland 20892 1061, USA
    Magn Reson Med 57:891-7. 2007
    ..Free-breathing T2 prepared SSFP provides T2-weighted images of acute MI with fewer artifacts and better diagnostic accuracy than conventional dark-blood TSE...
  35. pmc Real-time magnetic resonance imaging guidance for cardiovascular procedures
    Keith A Horvath
    Cardiothoracic Surgery Research Program, National Heart, Lung, and Blood Institute NHLBI, NIH, Bethesda, MD 20892, USA
    Semin Thorac Cardiovasc Surg 19:330-5. 2007
    ..Instruments and devices can be marked to enhance visualization and tracking, all of which is an advance over standard X-ray or ultrasonic imaging...
  36. pmc Endocardial versus epicardial electrical synchrony during LV free-wall pacing
    Owen P Faris
    Laboratory of Cardiac Energetics, NHLBI National Institutes of Health, 10 Center Drive, Rm B1D416, Bethesda, MD 20892, USA
    Am J Physiol Heart Circ Physiol 285:H1864-70. 2003
    ..Assessment of electrical epicardial delay, as often used clinically during cardiac resynchronization therapy lead placement, should provide adequate assessment of stimulation delay for inner wall layers as well...
  37. pmc Electromechanical analysis of infarct border zone in chronic myocardial infarction
    Hiroshi Ashikaga
    Laboratory of Cardiac Energetics, NHLBI, NIH, 10 Center Dr, MSC 1061, Bldg 10, B1D416, Bethesda, MD 20892 1061, USA
    Am J Physiol Heart Circ Physiol 289:H1099-105. 2005
    ..This indicates that impaired function in the border zone is not contributed by electrical factors but results from mechanical interaction between ischemic and normal myocardium...
  38. pmc Real-time accelerated interactive MRI with adaptive TSENSE and UNFOLD
    Michael A Guttman
    Laboratory of Cardiac Energetics, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland 20892, USA
    Magn Reson Med 50:315-21. 2003
    ..For imaging with a combination of surface and interventional coils, a hybrid reconstruction approach is proposed whereby UNFOLD is used for the interventional coils, and TSENSE with or without UNFOLD is used for the surface coils...
  39. pmc Artifact suppression in imaging of myocardial infarction using B1-weighted phased-array combined phase-sensitive inversion recovery
    Peter Kellman
    Laboratory of Cardiac Energetics, National Heart, Lung and Blood Institute, National Institutes of Health, DHHS, Bethesda, Maryland 20892 1061, USA
    Magn Reson Med 51:408-12. 2004
    ..Example images are shown that illustrate the suppression of CSF ghost artifacts by the use of B1-weighted phased-array combining of multiple receiver coils...
  40. pmc Novel technique for cardiac electromechanical mapping with magnetic resonance imaging tagging and an epicardial electrode sock
    Owen P Faris
    Laboratory of Cardiac Energetics, National Institutes of Health, NHLBI, 10 Center Drive, Room B1D416, Bethesda, MD 20892, USA
    Ann Biomed Eng 31:430-40. 2003
    ..This method holds promise for improving understanding of the relationships between the patterns of electrical activation and contraction in the heart...
  41. pmc Imaging of myocardial infarction for diagnosis and intervention using real-time interactive MRI without ECG-gating or breath-holding
    Michael A Guttman
    Laboratory of Cardiac Energetics, National Heart, Lung and Blood Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland 20892 1061, USA
    Magn Reson Med 52:354-61. 2004
    ..Supplementary material for this article can be found on the MRM website at http://www.interscience.wiley.com/jpages/0740-3194/suppmat/index.html...
  42. pmc Phase-sensitive inversion recovery for detecting myocardial infarction using gadolinium-delayed hyperenhancement
    Peter Kellman
    Laboratory of Cardiac Energetics, National Institutes of Health, National Heart, Lung and Blood Institute, Bethesda, Maryland 20892 1061, USA
    Magn Reson Med 47:372-83. 2002
    ..Phase-sensitive detection also has the advantage of decreasing the sensitivity to changes in tissue T(1) with increasing delay from contrast agent injection...
  43. pmc Technology preview: X-ray fused with magnetic resonance during invasive cardiovascular procedures
    Luis F Gutierrez
    Laboratory of Cardiac Energetics, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland
    Catheter Cardiovasc Interv 70:773-82. 2007
    ..We report our initial clinical experience applying XFM, using external fiducial markers, electrocardiogram (ECG)- gating, and automated real-time correction for gantry and table movement...
  44. pmc Simultaneous imaging of myocardial motion and chamber blood flow with SPAMM n' EGGS (Spatial Modulation of Magnetization With Encoded Gradients for Gauging Speed)
    Smita Sampath
    Laboratory of Cardiac Energetics, National Heart, Lung, and Blood Institute, National Institutes of Health, DHHS, Bethesda, Maryland 20892 1061, USA
    J Magn Reson Imaging 27:809-17. 2008
    ....
  45. pmc Respiratory motion of the heart from free breathing coronary angiograms
    Guy Shechter
    Laboratory of Cardiac Energetics, NHLBI, National Institutes of Health, DHHS, Bethesda, MD 20892, USA
    IEEE Trans Med Imaging 23:1046-56. 2004
    ..In eight patients, the heart also translated anteriorly (mean, 1.3+/-1.8 mm; range, -0.4 to 5.1 mm) and rotated in a caudo-dextral direction (mean, 1.2 degrees+/-1.3 degrees; range, -1.9 degrees to 3.2 degrees)...
  46. pmc Phased array ghost elimination (PAGE) for segmented SSFP imaging with interrupted steady-state
    Peter Kellman
    Laboratory of Cardiac Energetics, National Institutes of Health, National Heart, Lung and Blood Institute, Bethesda, Maryland 20892 1061, USA
    Magn Reson Med 48:1076-80. 2002
    ..PAGE was demonstrated for cardiac cine SSFP imaging with interrupted steady-state using a simple alpha/2 magnetization preparation and storage scheme and a spatial tagging preparation...
  47. pmc Rest period duration of the coronary arteries: implications for magnetic resonance coronary angiography
    Guy Shechter
    Lab of Cardiac Energetics, NHLBI, Bethesda, Maryland 20892 1061, USA
    Med Phys 32:255-62. 2005
    ..Measurements of the cardiac and respiratory rest periods will improve our understanding of the temporal and spatial resolution constraints for coronary imaging...
  48. pmc Serial cardiac magnetic resonance imaging of injected mesenchymal stem cells
    Jonathan M Hill
    Cardiovascular Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Building 10, Room 2c713, Bethesda, MD 20892 1538, USA
    Circulation 108:1009-14. 2003
    ..We hypothesized that mesenchymal stem cells (MSCs) could be labeled with a iron fluorophore particle (IFP) to provide MRI contrast in vivo to assess immediate and long-term localization...
  49. pmc Magnetic resonance imaging-guided vascular interventions
    Cengizhan Ozturk
    Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
    Top Magn Reson Imaging 16:369-81. 2005
    ..The potential of endovascular interventional MRI is great because as a single modality, it combines 3-dimensional anatomic imaging, device localization, hemodynamics, tissue composition, and function...
  50. pmc Centering the projection reconstruction trajectory: reducing gradient delay errors
    Dana C Peters
    Laboratory of Cardiac Energetics, NHLBI, National Institutes of Health, DHHS, Bethesda, Maryland 20892, USA
    Magn Reson Med 50:1-6. 2003
    ..Using corrected trajectories, artifacts were reduced in phantom images and in volunteer studies. This correction should potentiate greater clinical use of the PR trajectory...
  51. pmc Fast measurement of intracardiac pressure differences with 2D breath-hold phase-contrast MRI
    Richard B Thompson
    Laboratory of Cardiac Energetics, National Institutes of Health, Bethesda, Maryland 20892, USA
    Magn Reson Med 49:1056-66. 2003
    ..There was excellent agreement between the transducer and PC-MRI results in all of the studies...
  52. pmc Flow-gated phase-contrast MRI using radial acquisitions
    Richard B Thompson
    Laboratory of Cardiac Energetics, National Institutes of Health, Bethesda, MD 20892 1061, USA
    Magn Reson Med 52:598-604. 2004
    ..Flow-gated PC experiments were performed on five normal volunteers with slice prescriptions in four anatomic regions. The standard deviation (SD) of the difference between the flow-gating and ECG gating times ranged from 5 ms to 12 ms...
  53. doi request reprint Imaging left ventricular tissue mechanics and hemodynamics during supine bicycle exercise using a combined tagging and phase-contrast MRI pulse sequence
    Smita Sampath
    Laboratory of Cardiac Energetics, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, DHHS, Bethesda, Maryland, USA
    Magn Reson Med 65:51-9. 2011
    ..5 ± 7.72 versus 84.32 ± 6.24). These results suggest that although diastole is shortened, early diastolic filling efficiency is augmented during exercise stress in normal volunteers in an effort to maintain stroke volume...
  54. pmc Geodesic based registration of sensor data and anatomical surface image data
    Bruce Hopenfeld
    National Heart, Lung and Blood Institute, National Institutes of Health, 10 Center Dr, MSC 1061, Bethesda, MD 20892 1061, USA
    Ann Biomed Eng 35:1771-81. 2007
    ..Laplace's equation is solved on this mesh to generate a mapping from the anatomical surface to the data surface (electrode plaque)...
  55. pmc Self-gated cardiac cine MRI
    Andrew C Larson
    Laboratory of Cardiac Energetics, NHLBI, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland 20892 1061, USA
    Magn Reson Med 51:93-102. 2004
    ....
  56. pmc Visualization of tensor fields using superquadric glyphs
    Daniel B Ennis
    National Institutes of Health, National Heart, Lung, and Blood Institute, Bethesda, Maryland, USA
    Magn Reson Med 53:169-76. 2005
    ..Superquadric glyphs improve the ability to distinguish fiber orientation and tissue orthotropy compared to ellipsoids...
  57. pmc Real-time, Interactive MRI for cardiovascular interventions
    Elliot R McVeigh
    Laboratory of Cardiac Energetics, National Heart, Lung, and Blood Institute, National Institutes of Health, Building 10, Room B1D416, Bethesda, MD 20892 106, USA
    Acad Radiol 12:1121-7. 2005
  58. pmc Efficient implementation of hardware-optimized gradient sequences for real-time imaging
    J Andrew Derbyshire
    Translational Medicine Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, DHHS, Bethesda, Maryland 20892 1061, USA
    Magn Reson Med 64:1814-20. 2010
    ..The implementation provides 14-25% improvement in the sequence pulse repetition time over the vendor-supplied interactive real-time imaging sequence for similar scan parameters on our MRI scanner...
  59. ncbi request reprint Phase-sensitive cardiac tagging--REALTAG
    J Andrew Derbyshire
    Laboratory of Cardiac Energetics, National Heart Lung and Blood Institute, National Institutes of Health, DHHS, Bethesda, Maryland 20892 1061, USA
    Magn Reson Med 58:206-10. 2007
    ..Here we demonstrate the implementation of inverted tags with phase-sensitive reconstruction in a ramped-flip-angle, steady-state free precession (SSFP) sequence...
  60. pmc Automatic in-plane rotation for doubly-oblique cardiac imaging
    Peter Kellman
    Laboratory of Cardiac Energetics, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland 20892, USA
    J Magn Reson Imaging 18:612-5. 2003
    ..To develop and test a method for automatically calculating the in-plane rotation for doubly-oblique slice geometry in order to minimize wrap artifacts for a given FOV...
  61. pmc In vitro release of vascular endothelial growth factor from gadolinium-doped biodegradable microspheres
    Anthony Z Faranesh
    Department of Biomedical Engineering, The Johns Hopkins University, Baltimore, Maryland, USA
    Magn Reson Med 51:1265-71. 2004
    ..Biodegradable Gd-doped microspheres can be effectively used to deliver drugs in a sustained manner, while being monitored noninvasively with MRI...
  62. pmc Partial field-of-view spiral phase-contrast imaging using complex difference processing
    Reza Nezafat
    Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland, USA
    Magn Reson Med 56:676-80. 2006
    ..Experiments in a flow phantom and volunteers showed that the flow estimates obtained by pFOV spiral motion encoding are in good agreement with the estimates reconstructed using complex difference processing...
  63. pmc High-resolution MRI of cardiac function with projection reconstruction and steady-state free precession
    Dana C Peters
    Laboratory of Cardiac Energetics, National Institutes of Health, Bethesda, Maryland 20892 1061, USA
    Magn Reson Med 48:82-8. 2002
    ..Myocardial wall strain measurements derived from tagged MR images show correlation between regions of trabeculae and papillary muscles and regions of high strain, leading to an overestimation of function in the lateral wall...
  64. pmc Emerging imaging techniques
    Elliot R McVeigh
    Laboratory of Cardiac Energetics, NHLBI, National Institutes of Health, Bethesda, MD, USA
    Circ Res 98:879-86. 2006
    ..The techniques covered are: ultrasound biomicroscopy (UBM), microSPECT, microPET, near infrared imaging, and quantum dots. For each technique, the basic physical principles are explained and recent example applications demonstrated...
  65. pmc High temporal resolution phase contrast MRI with multiecho acquisitions
    Richard B Thompson
    Laboratory of Cardiac Energetics, National Institutes of Health, Bethesda, Maryland 20892 1061, USA
    Magn Reson Med 47:499-512. 2002
    ..A complete set of images containing velocity data in all three directions was acquired in four breath-holds, with a temporal resolution of 11.2 ms and an in-plane spatial resolution of 2 mm x 2 mm...
  66. pmc Myocardial tagging with SSFP
    Daniel A Herzka
    Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
    Magn Reson Med 49:329-40. 2003
    ..The increased acquisition efficiency of SSFP allowed decreases in breath-hold duration, or increases in temporal resolution, as compared to FGRE...
  67. pmc Real-time volumetric flow measurements with complex-difference MRI
    Richard B Thompson
    Laboratory of Cardiac Energetics, National Institutes of Health, Bethesda, Maryland 20892, USA
    Magn Reson Med 50:1248-55. 2003
    ..92 +/- 0.06 of the values measured with conventional PC imaging. Real-time in vivo volumetric flow imaging of transient flow events is also presented...
  68. pmc Catheter-based endomyocardial injection with real-time magnetic resonance imaging
    Robert J Lederman
    Cardiovascular Branch, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD 20892 1061, USA
    Circulation 105:1282-4. 2002
    ..We tested the feasibility of targeted left ventricular (LV) mural injection using real-time MRI (rtMRI)...
  69. pmc Multishot EPI-SSFP in the heart
    Daniel A Herzka
    Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland 20892 1061, USA
    Magn Reson Med 47:655-64. 2002
    ..The increased TR of multishot EPI-SSFP led to a reduced specific absorption rate (SAR) for a fixed RF flip angle, and allowed the use of a larger flip angle without increasing the SAR above the FDA-approved limits...
  70. pmc Signal-to-noise ratio behavior of steady-state free precession
    Scott B Reeder
    Department of Radiology, Stanford University Medical Center, Stanford, California 94304, USA
    Magn Reson Med 52:123-30. 2004
    ..The use of multi-echo SSFP acquisitions leads to substantial improvements in sequence performance (i.e., increased efficiency and shorter TR)...
  71. pmc Transmural dispersion of myofiber mechanics: implications for electrical heterogeneity in vivo
    Hiroshi Ashikaga
    Department of Medicine and Bioengineering, University of California, San Diego, La Jolla, California, USA
    J Am Coll Cardiol 49:909-16. 2007
    ..We investigated whether transmural mechanics could yield insight into the transmural electrical sequence...
  72. pmc Ex vivo 3D diffusion tensor imaging and quantification of cardiac laminar structure
    Patrick A Helm
    Center for Cardiovascular Bioinformatics and Modeling, Johns Hopkins University, Baltimore, MD 21218, USA
    Magn Reson Med 54:850-9. 2005
    ....
  73. pmc Torsion of the left ventricle during pacing with MRI tagging
    Jonathan M Sorger
    Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
    J Cardiovasc Magn Reson 5:521-30. 2003
    ..From these experiments we have shown that measuring torsion is an extremely sensitive indicator of the existence of ectopic excitation...
  74. pmc Model of reentrant ventricular tachycardia based on infarct border zone geometry predicts reentrant circuit features as determined by activation mapping
    Edward J Ciaccio
    Department of Pharmacology, Columbia University, New York, New York, USA
    Heart Rhythm 4:1034-45. 2007
    ..Infarct border zone (IBZ) geometry likely affects inducibility and characteristics of postinfarction reentrant ventricular tachycardia, but the connection has not been established...
  75. pmc Cardiorespiratory-resolved magnetic resonance imaging: measuring respiratory modulation of cardiac function
    Richard B Thompson
    Department of Biomedical Engineering, University of Alberta, Edmonton, Canada
    Magn Reson Med 56:1301-10. 2006
    ..85 +/- 0.29 (IVC), 1.36 +/- 0.15 (PA), 1.24 +/- 0.09 (Ao)). Peak flow occurred during inspiration for the IVC and PA, and during expiration for the Ao, and there was a complete pattern reversal for the positive-pressure ventilated dog...
  76. ncbi request reprint A computational framework for the statistical analysis of cardiac diffusion tensors: application to a small database of canine hearts
    Jean Marc Peyrat
    INRIA, Asclepios Research Project, 06902 Sophia Antipolis Cedex, France
    IEEE Trans Med Imaging 26:1500-14. 2007
    ..This information will be useful to guide the adjustment of average fiber models onto specific patients from in vivo anatomical imaging modalities...
  77. ncbi request reprint Timing of depolarization and contraction in the paced canine left ventricle: model and experiment
    Roy C P Kerckhoffs
    Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
    J Cardiovasc Electrophysiol 14:S188-95. 2003
    ..With the model, the relation between pacing site and patterns of depolarization and contraction was investigated...
  78. pmc Displacement and velocity of the coronary arteries: cardiac and respiratory motion
    Guy Shechter
    IEEE Trans Med Imaging 25:369-75. 2006
    ..Spatial variation in respiratory displacement and velocity of the coronary arteries indicates that the breathing motion of the heart is more complex than a 3-D translation...
  79. ncbi request reprint Effects of single- and biventricular pacing on temporal and spatial dynamics of ventricular contraction
    Bradley T Wyman
    Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
    Am J Physiol Heart Circ Physiol 282:H372-9. 2002
    ..Spatiotemporal distribution of contraction may be an important determinant of ventricular function...