title: [Automatic selection of optimal cardiac-phase in coronary CT angiography--its clinical usefulness for patients with atrial fibrillation].
abstract: The optimal cardiac phases for coronary CT angiography (CTA) are end-systole and mid-diastole, in which cardiac movement is slow. In conventional methods, these cardiac phases are determined by visual selection. We have compared the images in the optimal cardiac phases that were selected by the conventional method and cardiac-phase search software (Phase Navi), and examined the clinical usefulness of Phase Navi in patients with atrial fibrillation. The subjects were 38 patients (regular rhythm: 20, atrial fibrillation: 18). The continuity scores of patients with regular rhythm (Phase Navi, conventional methods) were 2.4+/-0.3-2.5+/-0.3 in end-systole and 2.4+/-0.5-2.4+/-0.4 in mid-diastole. The scores of patients with atrial fibrillation (Phase Navi, conventional methods) were 2.3+/-0.4-2.3+/-0.4 in end-systole, and 2.2+/-0.5-2.1+/-0.6 in mid-diastole. Because the continuity scores of the optimal images from Phase Navi were similar to those from the conventional method, Phase Navi had clinical usefulness in patients with atrial fibrillation.
authors.affiliation: Graduate school of Health Sciences, Fujita Health University.
authors.forename: Ryota
authors.initials: R
authors.lastname: Matsumoto
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Narita
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Anno
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Ida
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Sanda
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Katada
authors.forename: Sadako
authors.initials: S
authors.lastname: Motoyama
authors.forename: Masayoshi
authors.initials: M
authors.lastname: Sarai
authors.forename: Masaharu
authors.initials: M
authors.lastname: Tsuyuki
mesh_terms: D000368:Aged; D001281:Atrial Fibrillation / Q000000981:diagnostic imaging*; D017023:Coronary Angiography / Q000379:methods*; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008297:Male; D008875:Middle Aged; D012984:Software; D014057:Tomography, X-Ray Computed / Q000379:methods*