title: Automatic left ventricular volume measurements on contrast-enhanced ultrafast cine magnetic resonance imaging.
abstract: To assess the accuracy of automatic extraction of the left ventricular inner contour on contrast-enhanced ultrafast cine magnetic resonance (MR) images, we compared the values obtained by this method with those obtained using intravenous digital subtraction left ventriculography. High-quality single breath-hold contrast-enhanced ultrafast cine MR images were obtained in all cardiac phases on horizontal and vertical long axis sections of the left ventricle. For ultrafast cine MR imaging, a phase-rewind gradient-echo (rewind-SMASH) sequence was used. Automatic extraction of the left ventricular inner contour on contrast-enhanced ultrafast cine MR images was performed in all cardiac phases. High-quality left ventricular images of the horizontal long axis section were obtained in 127 of 160 patients (79%). The automatic extraction of the left ventricular contour was easily performed on high-quality images with very short processing time (4 s/frame). The values for left ventricular volumes obtained with the automatic extraction method on contrast-enhanced ultrafast cine MR imaging were correlated well with those obtained with the manual extraction method and IV-DSA in high quality cardiac images. The biplane modified Simpson's method using automatic extraction is an accurate and highly reproducible method for evaluating left ventricular volumes.
authors.affiliation: Department of Internal Medicine, Kyoto Minami Hospital, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Matsumura
authors.forename: E
authors.initials: E
authors.lastname: Nakase
authors.forename: T
authors.initials: T
authors.lastname: Haiyama
authors.forename: S
authors.initials: S
authors.lastname: Utsunomiya
mesh_terms: D002306:Cardiac Volume; D006331:Heart Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000503:physiopathology*; D006352:Heart Ventricles; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D011856:Radiographic Image Enhancement; D013318:Stroke Volume