title: Left ventricular myocardial volumes measured during arterial and delayed phases of multidetector row computed tomography: a study on intra- and interobserver variability.
abstract: To compare and correlate left ventricular (LV) myocardial volumes obtained using arterial and delayed phases of multidetector row computed tomography (CT) and evaluate their intra- and interobserver variation. Two observers evaluated the arterial- and delayed-phase serial short-axis images of 45 healthy volunteers. Intra- and interobserver variations in LV myocardial volumes were correlated with four factors-myocardial volume, contrast-volume-to-body-weight ratio, and contrast-to-noise ratios in the arterial and delayed phases. Variations in the apex, mid-ventricle, and base were compared. Intra- and interobserver analyzes revealed no statistical difference and good correlation. Intra- and interobserver variations were within 5 and 10%, respectively, and were independent of the four factors. Variations were the highest at the apex. LV myocardial volumes measured using arterial- and delayed-phase cardiac CT exhibit no significant difference and good correlation. Intra- and interobserver variations are both clinically acceptable, and the apex contributes most to these variations.
authors.affiliation: Department of Radiology, Taichung Veterans General Hospital, Taichung, Taiwan.
authors.forename: I-Chen
authors.initials: IC
authors.lastname: Tsai
authors.forename: Yu-Len
authors.initials: YL
authors.lastname: Huang
authors.forename: Wan-Chun
authors.initials: WC
authors.lastname: Liao
authors.forename: Kai-Hua
authors.initials: KH
authors.lastname: Kao
authors.forename: Min-Chi
authors.initials: MC
authors.lastname: Chen
mesh_terms: D000328:Adult; D000368:Aged; D005240:Feasibility Studies; D005260:Female; D006352:Heart Ventricles / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000000981:diagnostic imaging*; D009206:Myocardium / Q000473:pathology*; D015588:Observer Variation; D011237:Predictive Value of Tests; D011857:Radiographic Image Interpretation, Computer-Assisted; D012016:Reference Values; D015203:Reproducibility of Results; D014057:Tomography, X-Ray Computed / Q000379:methods*