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- Title
Assessment of right ventricular function by 16-detector-row CT: comparison with magnetic resonance imaging.
- Authors
Koch, K.; Oellig, F.; Oberholzer, K.; Bender, P.; Kunz, P.; Mildenberger, P.; Hake, U.; Kreitner, K.-F.; Thelen, M.
- Abstract
The purpose of this study was to determine right ventricular (RV) function from 16-detector-row CT by using two different software tools in comparison with MRI. Nineteen patients underwent cardiac CT. (1) With semiautomated contour detection software end-diastolic and end-systolic RV volumes were determined from short-axis CT reformations (MPR) created at every 10% of the RR-interval. (2) End-systolic and end-diastolic axial images were transformed to 3D to determine the volumes by using a threshold-supported reconstruction algorithm. Steady-state free-precession cine-MRI of the heart was done in short-axis orientation. RV function could not be analyzed in one patient because of sternal wire artifacts in MRI. Mean end-diastolic (155.4+/-54.6 ml) and end-systolic (79.1+/-37.0 ml) RV volumes determined with MPR correlated well with MRI [151.9+/-53.7 ml (r=0.98) and 75.0+/-36.0 ml (r=0.96), respectively (P<0.001)]. RV stroke volume (76.2+/-20.2 ml for MPR-CT, 76.9+/-20.7 ml for MRI, r=0.93) showed a good correlation and RV ejection fraction (50.8+/-8.4% for MPR-CT, 51.9+/-7.4% for MRI, r=0.74) only a moderate one. Threshold supported 3D reconstructions revealed insufficient correlations with MRI (r=0.31-0.59). MPR-based semiautomated analysis of cardiac 16 detector-row CT allows for RV functional analysis. The results correlate well with MRI findings. Threshold value-supported 3D reconstructions did not show satisfying results because of inhomogeneities of RV contrast enhancement.
- Subjects
HEART; CARDIOLOGY; MEDICAL imaging systems; MAGNETIC resonance imaging; DIAGNOSTIC imaging; MEDICAL equipment; RIGHT heart ventricle; COMPARATIVE studies; COMPUTED tomography; HEART beat; DIGITAL image processing; LONGITUDINAL method; RESEARCH methodology; MEDICAL cooperation; NONPARAMETRIC statistics; RESEARCH; THREE-dimensional imaging; EVALUATION research; CONTRAST media; PHYSIOLOGY
- Publication
European Radiology, 2005, Vol 15, Issue 2, p312
- ISSN
0938-7994
- Publication type
journal article
- DOI
10.1007/s00330-004-2543-6