Mark Bydder

Summary

Affiliation: University of California
Country: USA

Publications

  1. ncbi request reprint Generalized SMASH imaging
    Mark Bydder
    Robert Steiner MR Unit, MRC Clinical Sciences Centre, Imperial College School of Medicine, Hammersmith Hospital, London, UK
    Magn Reson Med 47:160-70. 2002
  2. ncbi request reprint Evaluation of optimal density weighting for regridding
    Mark Bydder
    Department of Radiology, University of California San Diego, San Diego, CA 92103 8226, USA
    Magn Reson Imaging 25:695-702. 2007
  3. ncbi request reprint Optimization of sensitivity encoding with arbitrary k-space trajectories
    Mark Bydder
    Department of Radiology, MRI3 Research, University of California San Diego, San Diego, CA 92103 8226, USA
    Magn Reson Imaging 25:1123-9. 2007
  4. pmc Assessment of liver fat quantification in the presence of iron
    Mark Bydder
    University of California San Diego, San Diego, CA 92103 8226, USA
    Magn Reson Imaging 28:767-76. 2010
  5. doi request reprint A nonlinear regularization strategy for GRAPPA calibration
    Mark Bydder
    Department of Radiology, University of California San Diego, San Diego, CA 92103 8226, USA
    Magn Reson Imaging 27:137-41. 2009
  6. pmc Constraining the initial phase in water-fat separation
    Mark Bydder
    Department of Radiology, University of California San Diego, San Diego, CA, USA
    Magn Reson Imaging 29:216-21. 2011
  7. pmc Optimal phased-array combination for spectroscopy
    Mark Bydder
    MR3T Building, Department of Radiology, University of California San Diego, San Diego, CA 92103 8226, USA
    Magn Reson Imaging 26:847-50. 2008
  8. pmc Relaxation effects in the quantification of fat using gradient echo imaging
    Mark Bydder
    MR3 Research Building, University of California San Diego, San Diego, CA 92103 8226, USA
    Magn Reson Imaging 26:347-59. 2008
  9. doi request reprint Mapping the double bonds in triglycerides
    Mark Bydder
    Department of Radiology, University of California San Diego, San Diego, CA 92103 8226, USA
    Magn Reson Imaging 29:1041-6. 2011
  10. pmc Nonalcoholic fatty liver disease: diagnostic and fat-grading accuracy of low-flip-angle multiecho gradient-recalled-echo MR imaging at 1.5 T
    Takeshi Yokoo
    Department of Radiology, University of California, San Diego Medical Center, University of California at San Diego, MR3 Laboratory, 408 Dickinson St, San Diego, CA 92103 8226, USA
    Radiology 251:67-76. 2009

Collaborators

Detail Information

Publications40

  1. ncbi request reprint Generalized SMASH imaging
    Mark Bydder
    Robert Steiner MR Unit, MRC Clinical Sciences Centre, Imperial College School of Medicine, Hammersmith Hospital, London, UK
    Magn Reson Med 47:160-70. 2002
    ..The method was tested on phantom and human data and provides a robust method of data recovery...
  2. ncbi request reprint Evaluation of optimal density weighting for regridding
    Mark Bydder
    Department of Radiology, University of California San Diego, San Diego, CA 92103 8226, USA
    Magn Reson Imaging 25:695-702. 2007
    ..A variant on one of the techniques is proposed that yields the highest accuracy of those studied...
  3. ncbi request reprint Optimization of sensitivity encoding with arbitrary k-space trajectories
    Mark Bydder
    Department of Radiology, MRI3 Research, University of California San Diego, San Diego, CA 92103 8226, USA
    Magn Reson Imaging 25:1123-9. 2007
    ..A modification to the intensity correction is proposed for use with a phase constraint...
  4. pmc Assessment of liver fat quantification in the presence of iron
    Mark Bydder
    University of California San Diego, San Diego, CA 92103 8226, USA
    Magn Reson Imaging 28:767-76. 2010
    ..Curve-fitting using the biexponential decay was found to be problematic. The overestimation of FF may be due to remaining deficiencies in the model, although is unlikely to be important for clinical diagnosis of steatosis...
  5. doi request reprint A nonlinear regularization strategy for GRAPPA calibration
    Mark Bydder
    Department of Radiology, University of California San Diego, San Diego, CA 92103 8226, USA
    Magn Reson Imaging 27:137-41. 2009
    ..The approach requires certain nonlinear relationships between the GRAPPA coefficients to be satisfied, which increases the redundancy so that fewer ACS need to be acquired...
  6. pmc Constraining the initial phase in water-fat separation
    Mark Bydder
    Department of Radiology, University of California San Diego, San Diego, CA, USA
    Magn Reson Imaging 29:216-21. 2011
    ..The advantages of phase constrained water-fat separation, namely, improved noise performance and/or reduced data requirements (fewer echos), are demonstrated in simulations and experiments...
  7. pmc Optimal phased-array combination for spectroscopy
    Mark Bydder
    MR3T Building, Department of Radiology, University of California San Diego, San Diego, CA 92103 8226, USA
    Magn Reson Imaging 26:847-50. 2008
    ..Subsequent processing of the combined signal (e.g., Fourier transform, baseline correction, phasing) may proceed as per a single coil acquisition...
  8. pmc Relaxation effects in the quantification of fat using gradient echo imaging
    Mark Bydder
    MR3 Research Building, University of California San Diego, San Diego, CA 92103 8226, USA
    Magn Reson Imaging 26:347-59. 2008
    ..At short echo times, the spectral broadening effects manifest as a short apparent T2 for the fat component...
  9. doi request reprint Mapping the double bonds in triglycerides
    Mark Bydder
    Department of Radiology, University of California San Diego, San Diego, CA 92103 8226, USA
    Magn Reson Imaging 29:1041-6. 2011
    ..95, significance P=.0003, slope 0.95±0.31, intercept 0.08±1.24). Feasibility in a human subject was demonstrated using a long breath-hold (43 s) scan...
  10. pmc Nonalcoholic fatty liver disease: diagnostic and fat-grading accuracy of low-flip-angle multiecho gradient-recalled-echo MR imaging at 1.5 T
    Takeshi Yokoo
    Department of Radiology, University of California, San Diego Medical Center, University of California at San Diego, MR3 Laboratory, 408 Dickinson St, San Diego, CA 92103 8226, USA
    Radiology 251:67-76. 2009
    ....
  11. pmc Effect of PRESS and STEAM sequences on magnetic resonance spectroscopic liver fat quantification
    Gavin Hamilton
    Department of Radiology, University of California, San Diego, San Diego, California 92103 8226, USA
    J Magn Reson Imaging 30:145-52. 2009
    ..To compare PRESS and STEAM MR spectroscopy for assessment of liver fat in human subjects...
  12. doi request reprint Fatty liver disease: MR imaging techniques for the detection and quantification of liver steatosis
    Fiona Hughes Cassidy
    Department of Radiology, University of California at San Diego, 200 W Arbor Dr, San Diego, CA 92103, USA
    Radiographics 29:231-60. 2009
    ....
  13. pmc Estimation of hepatic proton-density fat fraction by using MR imaging at 3.0 T
    Takeshi Yokoo
    Department of Radiology, University of California at San Diego, 408 Dickinson St, San Diego, CA 92103 8592, USA
    Radiology 258:749-59. 2011
    ..To compare the accuracy of several magnetic resonance (MR) imaging-based methods for hepatic proton-density fat fraction (FF) estimation at 3.0 T, with spectroscopy as the reference technique...
  14. ncbi request reprint Error model for reduction of cardiac and respiratory motion effects in quantitative liver DW-MRI
    Paul Murphy
    Department of Radiology, University of California, San Diego, California
    Magn Reson Med 70:1460-9. 2013
    ..These results suggest that, relative to least-squares estimation, the Beta*LogNormal model accomplishes the intended reduction of bias and variance from bulk motion in liver diffusion imaging...
  15. doi request reprint Reproducibility of MRI-determined proton density fat fraction across two different MR scanner platforms
    Geraldine H Kang
    Liver Imaging Group, Department of Radiology, University of California, San Diego Medical Center, University of California at San Diego, MR3T Laboratory, San Diego, California 92103 8226, USA
    J Magn Reson Imaging 34:928-34. 2011
    ....
  16. pmc In vivo characterization of the liver fat ¹H MR spectrum
    Gavin Hamilton
    Department of Radiology, University of California, San Diego, CA 92103 8749, USA
    NMR Biomed 24:784-90. 2011
    ..These values predict that 8.6% of the total fat signal overlies the water peak. The triglyceride model can characterize human liver fat spectra. This allows more accurate determination of liver fat fraction from MRI and MRS...
  17. ncbi request reprint Short T2 contrast with three-dimensional ultrashort echo time imaging
    Jiang Du
    Department of Radiology, University of California, San Diego, CA 92103 8226, USA
    Magn Reson Imaging 29:470-82. 2011
    ..Signal-to-noise ratios and contrast-to-noise ratios were used to compare the techniques...
  18. doi request reprint Qualitative and quantitative ultrashort echo time (UTE) imaging of cortical bone
    Jiang Du
    Department of Radiology, University of California, San Diego, United States
    J Magn Reson 207:304-11. 2010
    ..7 ± 1.3% with adiabatic inversion prepared UTE sequences were found in tibia in five normal volunteers. The results show that in vivo qualitative and quantitative evaluation of cortical bone is feasible with 2D UTE sequences...
  19. doi request reprint Effect of shot number on the calculated apparent diffusion coefficient in phantoms and in human liver in diffusion-weighted echo-planar imaging
    Masoud Shiehmorteza
    Department of Radiology, University of California, San Diego, California, USA
    J Magn Reson Imaging 30:547-53. 2009
    ..To show the signal intensity varies with shot number in diffusion-weighted (DW) echo-planar imaging (EPI) and affects apparent diffusion coefficient (ADC) calculation...
  20. pmc Robustness of fat quantification using chemical shift imaging
    Katie H Hansen
    Department of Radiology, University of California San Diego, San Diego, CA 92103 8226, USA
    Magn Reson Imaging 30:151-7. 2012
    ..Results indicated no significant (or significant but small) changes in fat fraction with parameter. The significant changes can be attributed to the known effects of T1 bias and two forms of noise bias...
  21. ncbi request reprint Two-dimensional ultrashort echo time imaging using a spiral trajectory
    Jiang Du
    Department of Radiology, University of Calfornia San Diego, CA 92103, USA
    Magn Reson Imaging 26:304-12. 2008
    ..A quantitative comparison was also made between radial UTE and SUTE in terms of signal-to-noise ratio efficiency...
  22. ncbi request reprint High-resolution time-resolved contrast-enhanced MR abdominal and pulmonary angiography using a spiral-TRICKS sequence
    Jiang Du
    Department of Radiology, University of California San Diego, San Diego, California 92103 8756, USA
    Magn Reson Med 58:631-5. 2007
    ..Image quality was improved through spiral trajectory measurement and field-map correction. Phantom and volunteer studies were performed to demonstrate the feasibility of this technique...
  23. pmc Evaluation of MRI fat fraction in the liver and spine pre and post SPIO infusion
    Joy Liau
    University of California San Diego, San Diego, CA 92103 8226, USA
    Magn Reson Imaging 31:1012-6. 2013
    ..3×10(-2)) but PDFFs were not significantly different in either the liver (p=5.5×10(-1)) or the spine (p=5.6×10(-1)). These results confirm that the IDEAL IQ method of fat quantification is robust to changes in R2*...
  24. ncbi request reprint Ultrashort TE imaging with off-resonance saturation contrast (UTE-OSC)
    Jiang Du
    Department of Radiology, University of California, San Diego, San Diego, CA 92103 8756, USA
    Magn Reson Med 62:527-31. 2009
    ..High-contrast images of the Achilles tendon and cortical bone were generated with a high contrast-to-noise ratio (CNR) of the order of 12 to 20 between short T(2) and long T(2) species within a total scan time of 4 to 10 min...
  25. doi request reprint Radiofrequency pulses for simultaneous short T2 excitation and long T2 suppression
    Michael Carl
    GE Healthcare, University of California, San Diego, La Jolla, California 92103 8226, USA
    Magn Reson Med 65:531-7. 2011
    ..Bloch simulations and experimental studies on short T(2) phantoms and specimen were used to test the sequence performance...
  26. pmc Nonalcoholic fatty liver disease: MR imaging of liver proton density fat fraction to assess hepatic steatosis
    An Tang
    Liver Imaging Group, Department of Radiology, University of California San Diego, 408 Dickinson St, San Diego, CA 92103 8226, USA
    Radiology 267:422-31. 2013
    ....
  27. pmc Cross-sectional investigation of correlation between hepatic steatosis and IVIM perfusion on MR imaging
    James T Lee
    Department of Radiology, Division of Emergency and Abdominal Radiology, University of Kentucky, Lexington, KY 40536 0293, USA
    Magn Reson Imaging 30:572-8. 2012
    ..002) and f vs. D (r=-0.458, P=.005). The conclusion is that hepatic steatosis does not affect measurement of perfusion or diffusion and therefore is unlikely to confound the use of apparent diffusivity to evaluate hepatic fibrosis...
  28. pmc Cardiac motion in diffusion-weighted MRI of the liver: artifact and a method of correction
    Joy Liau
    Department of Radiology, University of California San Diego, San Diego, CA 92103 8226, USA
    J Magn Reson Imaging 35:318-27. 2012
    ..To characterize cardiac motion artifacts in the liver and assess the use of a postprocessing method to mitigate these artifacts in repeat measurements...
  29. pmc SNR and functional sensitivity of BOLD and perfusion-based fMRI using arterial spin labeling with spiral SENSE at 3 T
    Joanna E Perthen
    Center for Functional MRI and Department of Radiology, University of California, San Diego, La Jolla, CA 92093, USA
    Magn Reson Imaging 26:513-22. 2008
    ..However, results for the perfusion data were more dependent on the threshold used for ROI selection, most likely due to the inherently low SNR of functional perfusion data...
  30. ncbi request reprint Optimization of RF excitation to maximize signal and T2 contrast of tissues with rapid transverse relaxation
    Michael Carl
    GE Healthcare, San Diego, California, USA
    Magn Reson Med 64:481-90. 2010
    ..Experimental studies on short T(2) phantoms confirm these optimization criteria for both signal-to-noise ratio and contrast-to-noise ratio...
  31. pmc Self-calibrated multiple-echo acquisition with radial trajectories using the conjugate gradient method (SMART-CG)
    Youngkyoo Jung
    Department of Radiology, Wake Forest University School of Medicine, Winston Salem, North Carolina, USA
    J Magn Reson Imaging 33:980-7. 2011
    ..The information also allows simultaneous support for parallel imaging for multiple coil acquisitions...
  32. ncbi request reprint Noise reduction in multiple-echo data sets using singular value decomposition
    Mark Bydder
    Department of Radiology, Magnetic Resonance Institute, University of California San Diego, San Diego, CA 92103 8756, USA
    Magn Reson Imaging 24:849-56. 2006
    ..The result is a reduction in noise in the individual TE images with minimal degradation of the spatial resolution and contrast. Phantom and in vivo results are presented...
  33. doi request reprint Effects of intravenous gadolinium administration and flip angle on the assessment of liver fat signal fraction with opposed-phase and in-phase imaging
    Takeshi Yokoo
    Department of Radiology, University of California San Diego, 408 Dickinson Street, San Diego, CA 92122, USA
    J Magn Reson Imaging 28:246-51. 2008
    ..To assess the effects of intravenous gadolinium (Gd) and flip angle (FA) on liver fat quantification by opposed-phase (OP) and in-phase (IP) imaging...
  34. ncbi request reprint Optimal phase difference reconstruction: comparison of two methods
    Kun Lu
    Department Radiology, Center for Functional MRI, University of California, San Diego, San Diego, CA 92093 0677, USA
    Magn Reson Imaging 26:142-5. 2008
    ..It is found that the WM algorithm is suboptimal, compared to the SENSE method at low SNR. Numerical simulations, phantom and in vivo results are presented...
  35. ncbi request reprint Partial fourier partially parallel imaging
    Mark Bydder
    Department of Radiology, Magnetic Resonance Institute, UCSD Medical Center, San Diego, California 92103 8456, USA
    Magn Reson Med 53:1393-401. 2005
    ..A nonrectilinear reconstruction algorithm is presented and the potential for motion artifact reduction is investigated using robust reconstruction...
  36. pmc MR properties of brown and white adipose tissues
    Gavin Hamilton
    Department of Radiology, University of California, San Diego, San Diego, California, USA
    J Magn Reson Imaging 34:468-73. 2011
    ..To explore the MR signatures of brown adipose tissue (BAT) compared with white adipose tissue (WAT) using single-voxel MR spectroscopy...
  37. ncbi request reprint Ultrashort echo time spectroscopic imaging (UTESI) of cortical bone
    Jiang Du
    Department of Radiology, University of California, San Diego, San Diego, California 92103 8226, USA
    Magn Reson Med 58:1001-9. 2007
    ..Relative water content and the resonance frequency shift due to bulk susceptibility were also evaluated. The feasibility of this technique was demonstrated with phantom and volunteer studies on a clinical 3T scanner...
  38. doi request reprint Prospective study of functional bone marrow-sparing intensity modulated radiation therapy with concurrent chemotherapy for pelvic malignancies
    Yun Liang
    Department of Radiation Oncology, and Center for Advanced Radiotherapy Technologies, University of California, San Diego, La Jolla, California 92093, USA
    Int J Radiat Oncol Biol Phys 85:406-14. 2013
    ....
  39. ncbi request reprint The magic angle effect: a source of artifact, determinant of image contrast, and technique for imaging
    Mark Bydder
    Department of Radiology, University of California, San Diego 92103, USA
    J Magn Reson Imaging 25:290-300. 2007
    ..The technique can also be used to produce contrast between tissues with fibers that have different orientations to B(0)...
  40. ncbi request reprint Magnetic resonance: an introduction to ultrashort TE (UTE) imaging
    Matthew D Robson
    Oxford University Center for Clinical Magnetic Resonance Research, MRS Unit, John Radcliffe Hospital
    J Comput Assist Tomogr 27:825-46. 2003
    ..Short T2 components in all of these tissues may show high signals. Possible future developments are outlined as are technical limitations...