Assessment of right ventricle volumes and function by cardiac MRI: Quantification of the regional and global interobserver variability

Reproducibility of the manual assessment of right ventricle volumes by short‐axis cine‐MRI remains low and is often attributed to the difficulty in separating the right atrium from the ventricle. This study was designed to evaluate the regional interobserver variability of the right ventricle volume...

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Veröffentlicht in:	Magnetic resonance in medicine Jg. 67; H. 6; S. 1740 - 1746
Hauptverfasser:	Bonnemains, Laurent, Mandry, Damien, Marie, Pierre-Yves, Micard, Emilien, Chen, Bailiang, Vuissoz, Pierre-André
Format:	Journal Article
Sprache:	Englisch
Veröffentlicht:	Hoboken Wiley Subscription Services, Inc., A Wiley Company 01.06.2012 Wiley
Schlagworte:	Adult Adult Algorithms Female Humans Image Enhancement/methods Image Interpretation, Computer-Assisted/methods Imaging, Three-Dimensional/methods Magnetic Resonance Imaging, Cine/methods Male Middle Aged Observer Variation Organ Size Pattern Recognition, Automated/methods Reproducibility of Results Sensitivity and Specificity Ventricular Dysfunction, Left/pathology Algorithms Cardiology and cardiovascular system Female Human health and pathology Humans Image Enhancement - methods Image Interpretation, Computer-Assisted - methods Imaging, Three-Dimensional - methods interobserver reliability Life Sciences Magnetic Resonance Imaging, Cine - methods Male Middle Aged MRI Observer Variation Organ Size Pattern Recognition, Automated - methods regional variability Reproducibility of Results right ventricular volumes Sensitivity and Specificity Ventricular Dysfunction, Left - pathology right ventricular volumes MRI interobserver reliability regional variability
ISSN:	0740-3194, 1522-2594, 1522-2594
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Zusammenfassung:	Reproducibility of the manual assessment of right ventricle volumes by short‐axis cine‐MRI remains low and is often attributed to the difficulty in separating the right atrium from the ventricle. This study was designed to evaluate the regional interobserver variability of the right ventricle volume assessment to identify segmentation zones with the highest interobserver variability. Short‐axis views of 90 right ventricles (30 hypertrophic, 30 dilated, and 30 normal) were acquired with 2D steady‐state free precession sequences at 1.5 T and were manually segmented by two observers. The two segmentations were compared and the variations were quantified with a variation score based on the Hausdorff distance between the two segmentations and the interobserver 95% limits of concordance of the global volumes. The right ventricles were semiautomatically split into four subregions: apex, mid‐ventricle, tricuspid zone, and infundibulum. These four subregions represented 11%, 34%, 36%, and 19% of the volume but, respectively, yielded variation scores of 8%, 16%, 42%, and 34%. The infundibulum yielded the highest interobserver regional variability although its variation score remained comparable to the tricuspid zone due to its lower volume. These results emphasize the importance of standardizing the segmentation of the infundibulum and the tricuspid zone to improve reproducibility. Magn Reson Med, 2011. © 2011 Wiley‐Liss, Inc.
Bibliographie:	FEDER INSERM ArticleID:MRM23143 istex:7A2021210BCB08B3481564B1153C6EFC10D1A936 ark:/67375/WNG-88659TPM-0 and the Region Lorraine ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0740-3194 1522-2594 1522-2594
DOI:	10.1002/mrm.23143