Abstract Archives of the RSNA, 2005
SSC05-08
Evaluation of Right Ventricular Volumes and Function by Multi-Detector Row Computed Tomography: Comparison with Cine Magnetic Resonance Imaging
Scientific Papers
Presented on November 28, 2005
Presented as part of SSC05: Cardiac (Multimodality)
Patrick Hein MD, Presenter: Nothing to Disclose
Pascal M Dohmen, Abstract Co-Author: Nothing to Disclose
Thomas Elgeti, Abstract Co-Author: Nothing to Disclose
Bernd K. Hamm MD, Abstract Co-Author: Nothing to Disclose
Dietmar Edvard Kivelitz MD, Abstract Co-Author: Nothing to Disclose
Alexander Lembcke MD, Abstract Co-Author: Nothing to Disclose
To validate right ventricular measurements obtained from multidetector row computed tomography (MDCT) data sets in comparison with cine magnetic resonance (MR) imaging as a reference standard.
21 patients (among them 9 patients with impaired RV function due to a pulmonary valve defect or a postvalvular stenosis) underwent contrast-enhanced ECG-gated MDCT (16 detector rows, maximum gantry speed 400 msec resulting in an effective acquisition time between 50 and 200 msec per cardiac cycle using multisegmental reconstruction) and steady-state free-precession cine MR imaging in a standardized fashion. RV volumes, ejection fraction, and myocardial mass were calculated according to the slice summation method. Measurements were compared using Pearson's correlation coefficient (r), Student's t test for paired samples, and Bland-Altman analysis. Interobserver and intraobserver variability was assessed by calculating the coefficient of variability.
The RV was completely visualized with invariably adequate image quality on all MDCT and cine MR images. For all RV parameters a close correlation between both modalities were found (EDV: r = 0.94, ESV: r = 0.96, SV: r = 0.91, EF: r = 0.95, mass: r = 0.88; p 0.05 each). Limits of agreement were in an acceptable range (EDV: -28.6 to +29.7 ml, ESV: -17.8 to +19.5 ml, SV: -19.8 to +16.2 ml, EF: -9.6 to +7.8 %, mass: -17.4 to +13.5 g). The coefficient of variability for intra- and interobserver agreement did not show significant differences between both modalities.
Despite its lower temporal resolution, MDCT seems to be an adequate technique for evaluating RV parameters, when compared with state-of-the-art cine MR imaging.
Hein, P,
Dohmen, P,
Elgeti, T,
Hamm, B,
Kivelitz, D,
Lembcke, A,
Evaluation of Right Ventricular Volumes and Function by Multi-Detector Row Computed Tomography: Comparison with Cine Magnetic Resonance Imaging. Radiological Society of North America 2005 Scientific Assembly and Annual Meeting, November 27 - December 2, 2005 ,Chicago IL.
http://archive.rsna.org/2005/4416893.html