Research Topics
| U KramerSummaryCountry: Germany Publications
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Detail Information
Publications
[Cardiac magnetic resonance tomography in the diagnostics of restrictive and unclassified cardiopathies]U Kramer
Abteilung für Diagnostische und Interventionelle Radiologie, Radiologische Klinik, Universitat Tubingen, Deutschland
Radiologe 53:45-53. 2013..Further diagnostic work-up should include cardiac MRI in case of any lack of clarity...
Diagnostic value of high spatial and temporal resolution time-resolved MR angiography in the workup of peripheral high-flow vascular malformations at 1.5 TeslaUlrich Kramer
University of Tuebingen, Tuebingen, Germany
Int J Cardiovasc Imaging 28:823-34. 2012..Therefore, TR-MRA represents a reasonable alternative imaging technique for the pre-treatment evaluation of high-flow VMs...
Comparison between a linear versus a macrocyclic contrast agent for whole body MR angiography in a clinical routine settingAchim Seeger
Department of Diagnostic and Interventional Radiology, Eberhard Karls University Tuebingen, Hoppe Seyler Str, 3, 72076 Tuebingen, Germany
J Cardiovasc Magn Reson 10:63. 2008..0 M macrocyclic contrast agent (gadobutrol, n = 80 patients) with a 0.5 M linear contrast agent (gadopentetate dimeglumine, n = 85 patients) on a 1.5 T whole body MR system. Digital subtraction angiography served as standard of reference...
High-resolution magnetic resonance angiography of the renal arteries using parallel imaging acquisition techniques at 3.0 T: initial experienceUlrich Kramer
Department of Cardiovascular MR Research, University of Los Angeles, Los Angeles, California, USA
Invest Radiol 41:125-32. 2006..The purpose of this prospective study was to investigate the feasibility of high-resolution magnetic resonance angiography (MRA) of the kidneys at 3.0 T using parallel data acquisition...
[Cardiac MR tagging: optimization of sequence parameters and comparison at 1.5 T and 3.0 T in a volunteer study]U Kramer
Abteilung Radiologische Diagnostik, Universitat Tubingen
Rofo 178:515-24. 2006..5 T in order to obtain the best image contrast between the myocardium, tag lines and blood signal. Theoretically expected improvements of signal-to-noise (SNR) and contrast-to-noise ratios (CNR) were also calculated...
Low-dose, time-resolved, contrast-enhanced 3D MR angiography in the assessment of the abdominal aorta and its major branches at 3 TeslaUlrich Kramer
Department of Diagnostic and Interventional Radiology, University of Tubingen, Tubingen, Germany
Acad Radiol 17:564-76. 2010....
[Remote control for magnetic resonance imaging as a part of daily routine examinations]U Kramer
Abt Radiologische Diagnostik, Radiologische Universitatsklinik, Hoppe Seyler Strasse 3, 72076 Tubingen
Rofo 179:739-42. 2007..This paper provides an account of our initial experiences using the remote control and describes practical future applications...
Magnetic resonance angiography of chest and abdomen at 3 TUlrich Kramer
Department of Diagnostic Radiology, University of Tuebingen, Germany
Top Magn Reson Imaging 18:105-15. 2007..This review describes the main technical innovations of advanced CE-MRA techniques at 3 T, illustrated by characteristic cases...
Preoperative evaluation of potential living related kidney donors with high-spatial-resolution magnetic resonance (MR) angiography at 3 Tesla: comparison with intraoperative findingsUlrich Kramer
Department of Diagnostic Radiology, University of Tuebingen, Tuebingen, Germany
Invest Radiol 42:747-55. 2007..The purpose of this prospective study was to determine the feasibility and accuracy of high-spatial-resolution MR imaging at 3 Tesla (T) in the preoperative evaluation of potential living related kidney donors...
Isotropic high-spatial-resolution contrast-enhanced 3.0-T MR angiography in patients suspected of having renal artery stenosisUlrich Kramer
Department of Diagnostic Radiology, University of Tuebingen, Hoppe Seyler Str 3, 72076 Tuebingen, Germany
Radiology 247:228-40. 2008..Owing to its high sensitivity, contrast-enhanced 3-T MR angiography can be used reliably to exclude RAS and can serve as a useful screening method in the diagnostic work-up of patients with arterial hypertension...
[Myocardial MR tagging: analysis of regional and global myocardial function]U Kramer
Abt für Diagnostische und Interventionelle Radiologie, Radiologische Klinik, Universitat Tubingen, Hoppe Seyler Str 3, 72076 Tubingen
Radiologe 50:532-40. 2010..5 T. As a consequence, tagging at higher field strengths may be well suited for the characterization of the diastolic portion of the cardiac cycle in future applications...
Pretreatment evaluation of peripheral vascular malformations using low-dose contrast-enhanced time-resolved 3D MR angiography: initial results in 22 patientsUlrich Kramer
Department Diagnostic and Interventional Radiology, University of Tuebingen, Germany
AJR Am J Roentgenol 196:702-11. 2011..The objective of our study was to assess the feasibility and diagnostic performance of time-resolved MR angiography (MRA) in the pretreatment evaluation of peripheral vascular malformations at 1.5 T...
[Clinical implication of parameter-optimized 3D-FISP MR angiography (MRA) in children with aortic coarctation: comparison with catheter angiography]U Kramer
Radiologische Klinik, Abteilung Radiologische Diagnostik, Eberhard Karls Universitat Tubingen
Rofo 176:1458-65. 2004..To implement parameter-optimized 3D-FISP MR angiography (MRA) with interleaved double-slab excitation and to compare the result with catheter angiography in children with aortic coarctation...
Scimitar syndrome: morphological diagnosis and assessment of hemodynamic significance by magnetic resonance imagingUlrich Kramer
Department of Diagnostic Radiology, University of Tuebingen, Hoppe Seyler Strasse 3, 72076 Tuebingen, Germany
Eur Radiol 13:L147-50. 2003..Left-to-right shunt was calculated from blood flow measurements performed in the ascending aorta, the main pulmonary artery, and the aberrant scimitar vein...
[TrueFISP MR imaging to determine the influence of hemodialysis on the myocardial functional parameters in patients with terminal renal insufficiency]U Kramer
Radiologische Klinik, Abteilung Radiologische Diagnostik, Eberhard Karls Universitat Tubingen, Tuebingen
Rofo 176:350-6. 2004....
[Multislice TrueFISP-MR imaging for identifying stress-induced myocardial functional disturbances in coronary heart disease]U Kramer
Radiologische Klinik, Abteilung Radiologische Diagnostik, Eberhard Karls Universitat Tubingen
Rofo 175:1355-62. 2003..This study assesses the left ventricular function using a new multislice cine sequence and determines the diagnostic accuracy of stress-induced wall motion abnormalities in patients with coronary artery disease (CAD)...
[Variability in the MR tomographic determination of myocardial function and perfusion parameters in health subjects]U Kramer
Universitätsklinik Tübingen, Abteilung Radiologische Diagnostik
Rofo 172:609-14. 2000..The aim of the study was to evaluate myocardial function and perfusion patterns using magnetic resonance imaging in normal subjects...
[2D-phase contrast flow evaluation and contrast-enhanced MR angiography for perioperative assessment of internal mammary artery grafts]N I Stauder
Abteilung Radiologische Diagnostik, Universitat Tubingen
Rofo 173:790-7. 2001..To evaluate LV functional parameters, graft flow and patency in patients with IMA grafts using a combined MR protocol with phase-contrast technique and contrast enhanced MR angiography...
MRI for evaluation of potential living liver donors: a new approach including contrast-enhanced magnetic resonance cholangiographyS Mangold
Department of Diagnostic and Interventional Radiology, Eberhard Karls University Tuebingen, Hoppe Seyler Strasse 3, 72076, Tuebingen, Germany
Abdom Imaging 37:244-51. 2012..To assess the feasibility of a comprehensive MRI protocol using intrabiliary contrast medium (gadolinium-EOB-DTPA) for evaluation of living liver donors...
1 M Gd-chelate (gadobutrol) for multislice first-pass magnetic resonance myocardial perfusion imagingM Fenchel
Department of Diagnostic Radiology, Eberhard Karls University, Tuebingen, Germany
Br J Radiol 80:884-92. 2007..This is comparable with recently published perfusion data using 0.5 M Gd-DTPA...
MRI assessment of cardiac amyloidosis: experience of six cases with review of the current literatureA Seeger
Department of Diagnostic and Interventional Radiology, Eberhard Karls Unviersity Tuebingen, Hoppe Seyler Str 3, 72076 Tuebingen, Germany
Br J Radiol 82:337-42. 2009..This pictorial review focuses on cases with histologically proven systemic amyloidosis and cardiac involvement in order to illustrate typical findings...
Depiction of variants of the portal confluence venous system using multidetector row CT: analysis of 916 casesP Krumm
Abteilung für Diagnostische und Interventionelle Radiologie, Universitatsklinikum Tubingen, Germany
Rofo 183:1123-9. 2011..Data about the mesenteric venous anatomy in the literature varies substantially. The purpose of this study was to categorize venous mesenteric variants and to determine their incidence...
[MR angiography and determination of the flow reserve after minimal invasive direct coronary artery bypass (MIDCAB) surgery of the left internal mammary artery in comparison to multirow CT]N I Stauder
Abteilung Radiologische Diagnostik, Universitätsklinik Tübingen
Rofo 177:1094-102. 2005..To evaluate graft patency, flow and flow reserve in patients with minimal invasive direct coronary artery bypass (MIDCAB) of internal mammary artery (IMA) grafts using a combined MR protocol with phase-contrast technique and MR angiography...
Perioperative monitoring of flow and patency in native and grafted internal mammary arteries using a combined MR protocolN I Stauder
Department of Diagnostic Radiology, Eberhard-Karls-University, , Germany
Br J Radiol 78:292-8. 2005..8+/-9.0 ml min(-1) m(-2) post-operatively (p<0.001). MRI allows a combined assessment of bypass patency and flow. This study protocol may be applicable to perioperative follow-up studies in patients after CABG surgery...
Subacute myocardial infarction: assessment by STIR T2-weighted MR imaging in comparison to regional functionS Miller
Department of Diagnostic Radiology, Eberhard Karls University, Hoppe Seyler Street 3, 72076, Tuebingen, Germany
MAGMA 13:8-14. 2001..This study investigates increased T2 SI compared to myocardial function in patients with reperfused subacute myocardial infarction. Preserved function was used as criterion for viability...
Magnetic resonance myocardial perfusion imaging-First experience at 3.0TB Klumpp
Eberhard Karls University Tubingen, University Hospital Tuebingen, Department of Diagnostic Radiology, Hoppe Seyler Str 3, 72076 Tuebingen, Germany
Eur J Radiol 69:165-72. 2009..Perfusion imaging at 3.0T provides certain advantages compared to 1.5T. Aim of this study was to evaluate myocardial MR perfusion imaging at 3.0T...
Detection of regional myocardial perfusion deficit using rest and stress perfusion MRI: a feasibility studyMichael Fenchel
Department of Diagnostic Radiology, Eberhard-Karls-University, Tuebingen 72076, Germany
AJR Am J Roentgenol 185:627-35. 2005..Semiquantitative perfusion parameters upslope and peak signal intensity yielded similar results...
[MR stress perfusion for the detection of flow-limiting stenoses in symptomatic patients with known coronary artery disease and history of stent implantation]A Seeger
Radiologische Diagnostik, Universitatsklinikum Tubingen
Rofo 179:1068-73. 2007....
[Cardiovascular whole-body MR imaging in patients with symptomatic peripheral arterial occlusive disease]M Fenchel
Abteilung für Radiologie, Eberhard Karls Universitat Tubingen
Rofo 178:491-9. 2006..The protocol comprises the assessment of the complete arterial vasculature (except coronary arteries), the brain, and the heart...
[Cardiac MRI in addition to MR angiography: a longitudinal study in vascular risk patients]A Seeger
Abteilung für Radiologische Diagnostik, Eberhard Karls Universitat Tubingen
Rofo 180:423-9. 2008..Therefore, the prevalence of delayed myocardial enhancement (DE) was determined in patients suffering from peripheral artery disease (PAD) and a clinical follow-up was evaluated after 2 years...
Ultrafast whole-body MR angiography with two-dimensional parallel imaging at 3.0 T: feasibility studyMichael Fenchel
Department of Diagnostic Radiology, Eberhard Karls University Tuebingen, Hoppe Seyler Str 3, 72076 Tuebingen, Germany
Radiology 250:254-63. 2009....
Intraindividual comparison of myocardial delayed enhancement MR imaging using gadobenate dimeglumine at 1.5 T and 3 TBernhard D Klumpp
Department for Diagnostic Radiology, Eberhard Karls University Tuebingen, Hoppe Seyler Str 3, 72076 Tuebingen, Germany
Eur Radiol 19:1124-31. 2009..3 at 1.5 T and 26.0 at 3 T (p < 0.05). Delayed enhancement MR imaging at 3 T is a robust procedure yielding superior tissue contrast at 3 T compared with 1.5 T which is, however, not reflected by increased image quality...
Stent struts and articulations: their impact on balloon-expandable stents' hoop strength, pushability, and radiopacity in an experimental settingJakub Wiskirchen
Department of Diagnostic Radiology, University Hospital Tubingen, Germany
Invest Radiol 37:356-62. 2002..OBJECTIVES AND RATIONALE: To evaluate the hoop strength, the pushability, and the radiopacity of endovascular stents depending on their design...
Towards risk stratification in systemic atherosclerosis: value of myocardial function and viability imaging as an adjunct to MR angiographyAchim Seeger
Department of Diagnostic and Interventional Radiology, Eberhard Karls University Tuebingen, Tuebingen, Germany
Eur Radiol 20:838-45. 2010..To longitudinally assess the value of cardiac functional and viability imaging as a supplement to MR angiography in patients with atherosclerotic disease...
High resolution myocardial magnetic resonance stress perfusion imaging at 3 T using a 1 M contrast agentBernhard D Klumpp
Department for Diagnostic Radiology, Eberhard Karls University Tuebingen, Hoppe Seyler Str 3, 72076 Tuebingen, Germany
Eur Radiol 20:533-41. 2010..The aim of our study was to investigate the diagnostic capability of high resolution MSPMRI at 3-T field strength using a 1 M contrast agent...
Three-dimensional cine MRI in free-breathing infants and children with congenital heart diseaseAchim Seeger
Department of Diagnostic and Interventional Radiology, University of Tuebingen, Tuebingen, Germany
Pediatr Radiol 39:1333-42. 2009..Patients with congenital heart disease frequently have complex cardiac and vascular malformations requiring detailed non-invasive diagnostic evaluation including functional parameters...
Determination of unknown high-grade atherosclerotic lesions by whole-body cardiovascular imaging: assessment of patients with symptomatic atherosclerotic disease of peripheral arteriesMichael Fenchel
Department of Diagnostic and Interventional Radiology, Eberhard Karls University, Hoppe Seyler Str 3, 72076 Tuebingen, Germany
Acad Radiol 17:219-29. 2010..We sought to determine the added clinical information of noninvasive magnetic resonance imaging (MRI) for detecting asymptomatic atherosclerotic disease in patients already at high risk...
Semiquantitative assessment of myocardial perfusion using magnetic resonance imaging: evaluation of appropriate thresholds and segmentation modelsMichael Fenchel
Department of Diagnostic Radiology, Division of Cardiology, Eberhard Karls University, Tuebingen, Germany
Invest Radiol 39:572-81. 2004..The aim of the study was to determine optimal thresholds for semiquantitative perfusion parameters and to evaluate the influence of different segmentation models in detecting malperfused regions...
Current concepts in the classification, diagnosis and treatment of vascular anomaliesUlrike Ernemann
Department of Diagnostic and Interventional Neuroradiology, Radiological Clinic, University Hospital Tubingen, Hoppe Seyler Strasse 3, 72076 Tubingen, Germany
Eur J Radiol 75:2-11. 2010....
MR Imaging of the heart with cine true fast imaging with steady-state precession: influence of spatial and temporal resolutions on left ventricular functional parametersStephan Miller
Department of Diagnostic Radiology, Eberhard Karls University, Tubingen, Hoppe Seyler Strasse 3, 72076 Tubingen, Germany
Radiology 223:263-9. 2002..MR imaging in the heart was performed in 15 healthy volunteers. A decrease in LV functional parameters was observed with reduced spatial and temporal resolutions. The influence of temporal resolution was more relevant...
Whole-body magnetic resonance angiography at 3.0 TeslaMichael Fenchel
Department of Diagnostic Radiology, Eberhard Karls University Tuebingen, Hoppe Seyler Str 3, 72076 Tuebingen, Germany
Eur Radiol 18:1473-83. 2008..The clinical value of advanced whole-body MR angiography techniques is illustrated by characteristic cases...
MR imaging at rest early after myocardial infarction: detection of preserved function in regions with evidence for ischemic injury and non-transmural myocardial infarctionStephan Miller
Department of Diagnostic Radiology, Eberhards Karls University, Hoppe Seyler Strasse 3, 72076 Tubingen, Germany
Eur Radiol 13:498-506. 2003..50-0.90, p<0.001) but not with the degree of coronary artery stenosis. Our data suggest that preserved function was detected in non-transmural myocardial infarction demonstrated by non-transmural late enhancement and increase of T2 SI...
Diagnosis of vascular rings and slings using an interleaved 3D double-slab FISP MR angiography techniqueGerald F Greil
Department of Paediatric Cardiology, Children s Hospital, University of Tuebingen, Hoppe Seyler Strasse 3, 72076 Tuebingen, Germany
Pediatr Radiol 35:396-401. 2005..Congenital upper airway obstruction and dysphagia may be caused by vascular rings and slings. Often, invasive and radiation-dependent diagnostic procedures are needed to clarify the diagnosis...
Perfusion MR imaging with FAIR true FISP spin labeling in patients with and without renal artery stenosis: initial experienceMichael Fenchel
Department of Diagnostic Radiology, Eberhard Karls University Tuebingen, Germany
Radiology 238:1013-21. 2006..76) and between FAIR and single photon emission computed tomographic perfusion values (r = 0.83) were observed. FAIR true FISP was found to be suitable for quantitative perfusion imaging of the kidneys in patients with RAS...
Multislice first-pass myocardial perfusion imaging: Comparison of saturation recovery (SR)-TrueFISP-two-dimensional (2D) and SR-TurboFLASH-2D pulse sequencesMichael Fenchel
Department of Diagnostic Radiology, Eberhard Karls University, Tuebingen, Germany
J Magn Reson Imaging 19:555-63. 2004..To compare signal-to-noise ratio (SNR), contrast-to-noise (CNR) ratio, and diagnostic accuracy of a newly developed saturation recovery (SR)-TrueFISP-two-dimensional (2D) sequence with an SR-TurboFLASH-2D sequence...
Atherosclerotic disease: whole-body cardiovascular imaging with MR system with 32 receiver channels and total-body surface coil technology--initial clinical resultsMichael Fenchel
Department of Diagnostic Radiology, Eberhard Karls University, Hoppe Seyler Strasse 3, 72076 Tuebingen, Germany
Radiology 238:280-91. 2006..For patients suspected of having systemic atherosclerotic disease, comprehensive risk assessment is feasible within 30 minutes...
Renal magnetic resonance angiography at 3.0 Tesla using a 32-element phased-array coil system and parallel imaging in 2 directionsMichael Fenchel
Department of Diagnostic Radiology, Eberhard Karls University Tuebingen, Hoppe Seyler Strasse 3, 72076 Tuebingen, Germany
Invest Radiol 41:697-703. 2006..0 T using a phased-array coil system with 32-coil elements. Specifically, high parallel imaging factors were used for an increased spatial resolution and anatomic coverage of the whole abdomen...
Three-dimensional morphological magnetic resonance imaging in infants and children with congenital heart diseaseMichael Fenchel
Diagnostic Radiology, Eberhard Karls University, Hoppe Seyler Str 3, Tuebingen, 72076, Germany
Pediatr Radiol 36:1265-72. 2006..However, diagnostic image quality in infants and young children has not yet been reported...
Cardiac magnetic resonance imaging at 3.0 TMichael Fenchel
Department of Diagnostic Radiology, Eberhard Karls University, Tuebingen, Germany
Top Magn Reson Imaging 18:95-104. 2007..0 T and the resulting potential benefit for an improved diagnostic value will constantly fuel further developments in this area and pave the way for novel, promising imaging techniques...
Myocardial perfusion after angioplasty in patients suspected of having single-vessel coronary artery disease: improvement detected at rest-stress first-pass perfusion MR imaging--initial experienceMichael Fenchel
Department of Diagnostic Radiology, Division of Cardiology, Eberhard Karls University Tuebingen, Hoppe Seyler Str 3, 72076 Tuebingen, Germany
Radiology 237:67-74. 2005....
Optimization of blood-myocardial contrast in 3D true FISP cardiac imaging at 1.5 TPetros Martirosian
Section on Experimental Radiology, University Hospital Tubingen, Tubingen, Germany
Magn Reson Med 57:213-9. 2007..The optimized 3D True-FISP sequence provides a reliable, accurate, and time-efficient means of obtaining a morphological cardiac diagnosis...
Whole-body MR angiography using a novel 32-receiving-channel MR system with surface coil technology: first clinical experienceMichael Fenchel
Department of Diagnostic Radiology, Eberhard Karls University, 72076 Tuebingen, Germany
J Magn Reson Imaging 21:596-603. 2005..To demonstrate the feasibility of detecting atherosclerotic vascular disease using an innovative magnetic resonance angiography (MRA) protocol in combination with a dedicated whole-body MR scanner with new surface coil technology...
Images in cardiovascular medicine. Follow-up of cardiac sarcoidosis by magnetic resonance imagingNorbert I Stauder
Department of Diagnostic Radiology, Eberhard Karls University, Tuebingen, Hoppe-Seyler-Strasse 3, Tuebingen, Germany 72076
Circulation 111:e158-60. 2005
Assessment of minimally invasive direct coronary artery bypass grafting of the left internal thoracic artery by means of magnetic resonance imagingNorbert I Stauder
Department of Diagnostic Radiology, Eberhard Karls University, Tuebingen, Germany
J Thorac Cardiovasc Surg 129:607-14. 2005....
Radiopacity of current endovascular stents: evaluation in a multiple reader phantom studyJakub Wiskirchen
Department of Diagnostic Radiology, University of Tubingen, Germany
J Vasc Interv Radiol 15:843-52. 2004..To evaluate the radiopacity of endovascular stents based on the fluoroscopy mode in a phantom of the human pelvis...
Pulmonary circulation: contrast-enhanced 3.0-T MR angiography--initial resultsKambiz Nael
Department of Radiological Sciences, University of California Los Angeles, 10945 Le Conte Ave, Suite 3371, Los Angeles, CA 90095 7206, USA
Radiology 240:858-68. 2006..To prospectively evaluate the technical feasibility of both high-spatial-resolution and time-resolved contrast material-enhanced magnetic resonance (MR) angiography of the pulmonary circulation at 3.0 T...
Whole-body contrast-enhanced magnetic resonance angiography: new advances at 3.0 TKambiz Nael
Department of Radiological Sciences, David Geffen School of Medicine, University of California, Los Angeles, CA 90095 7206, USA
Top Magn Reson Imaging 18:127-34. 2007..Thus, many clinicians regard evaluation of the whole-body arterial vasculature as desirable...
Radiopaque markers in endovascular stents--benefit and potential hazardsJ Wiskirchen
Department of Diagnostic Radiology, University Hospital Tubingen, Germany
Rofo 175:484-8. 2003..The secondary objective was to investigate the impact of such radiopaque markers on localized corrosion at the stent corpus-marker interfaces...
Adenosine stress cardiac magnetic resonance imaging for the assessment of ischemic heart diseaseChristina Doesch
Department of Cardiology, Eberhard Karls University, Tubingen, Otfried Muller Str 10, 72076, Tubingen, Germany
Clin Res Cardiol 97:905-12. 2008..This prospective study was designed to determine the diagnostic value of adenosine stress cardiac magnetic resonance imaging (CMRI) in patients referred to elective coronary angiography...
Interatrial lipoma: catheter ablation of an atrial tachycardia originating from a dislodged arrhythmogenic substrate assisted by a three-dimensional mapping system with a combined synchronized three-dimensional CT reconstructionKlaus Kettering
Medizinische Klinik III, , , , Germany
Clin Res Cardiol 96:396-9. 2007
Dual-source CT with improved temporal resolution in assessment of left ventricular function: a pilot studyHarald Brodoefel
Department of Diagnostic Radiology, Eberhard Karls University, Hoppe Seyler Str 3, 72076 Tubingen, Germany
AJR Am J Roentgenol 189:1064-70. 2007....
