| Autor: |
von Knobelsdorff-Brenkenhoff F, Frauenrath T, Prothmann M, Dieringer MA, Hezel F, Renz W, Kretschel K, Niendorf T, Schulz-Menger J, von Knobelsdorff-Brenkenhoff, Florian, Frauenrath, Tobias, Prothmann, Marcel, Dieringer, Matthias A, Hezel, Fabian, Renz, Wolfgang, Kretschel, Kerstin, Niendorf, Thoralf, Schulz-Menger, Jeanette |
| Zdroj: |
European Radiology; Dec2010, Vol. 20 Issue 12, p2844-2852, 9p |
| Abstrakt: |
Objectives: Interest in cardiovascular magnetic resonance (CMR) at 7 T is motivated by the expected increase in spatial and temporal resolution, but the method is technically challenging. We examined the feasibility of cardiac chamber quantification at 7 T.Methods: A stack of short axes covering the left ventricle was obtained in nine healthy male volunteers. At 1.5 T, steady-state free precession (SSFP) and fast gradient echo (FGRE) cine imaging with 7 mm slice thickness (STH) were used. At 7 T, FGRE with 7 mm and 4 mm STH were applied. End-diastolic volume, end-systolic volume, ejection fraction and mass were calculated.Results: All 7 T examinations provided excellent blood/myocardium contrast for all slice directions. No significant difference was found regarding ejection fraction and cardiac volumes between SSFP at 1.5 T and FGRE at 7 T, while volumes obtained from FGRE at 1.5 T were underestimated. Cardiac mass derived from FGRE at 1.5 and 7 T was larger than obtained from SSFP at 1.5 T. Agreement of volumes and mass between SSFP at 1.5 T and FGRE improved for FGRE at 7 T when combined with an STH reduction to 4 mm.Conclusions: This pilot study demonstrates that cardiac chamber quantification at 7 T using FGRE is feasible and agrees closely with SSFP at 1.5 T. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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