title: [Evaluation of 320-row area detector computed tomography (ADCT) coronary angiography for patients with atrial fibrillation].
abstract: The aim of this study was to evaluate 320-row area detector CT (ADCT) for patients with atrial fibrillation (Af) based on simulated exposure using electrocardiogram RR intervals and comparison with the findings of coronary CT angiography (CCTA) using 64-row multi slice CT (MSCT). The probability of including RR intervals of 900 ms or more was calculated when the acquisition time was varied from 1 to 4 beats. Overall, 51 patients with Af who underwent CCTA were examined. The exposure time for CCTA, the total dose length product (DLP) for the examination, and the image quality (scored 0 to 3: poor to excellent) were compared between ADCT and MSCT. The probability of including RR intervals of 900 ms or more was highly significantly increased at 3 beats of acquisition time. The exposure time using ADCT was reduced by 75% compared with MSCT (ADCT/MSCT: 2.8/11.3 s), and the total DLP was reduced by 40% (ADCT/MSCT: 1398/2277 mGy·cm). Moreover, ADCT provided diagnosable images in all cases, and the mean image quality score for ADCT was significantly higher than that for MSCT (ADCT/MSCT: 2.8/2.4). Thus, 320-row ADCT at 3 beats of acquisition time can provide CCTA images of acceptable quality for patients with Af.
authors.affiliation: Graduate School of Health Sciences, Fujita Health University.
authors.forename: Masachika
authors.initials: M
authors.lastname: Takagi
authors.forename: Takeshi
authors.initials: T
authors.lastname: Kaneko
authors.forename: Ryohei
authors.initials: R
authors.lastname: Kato
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Anno
authors.forename: Satoshi
authors.initials: S
authors.lastname: Yoshimi
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
mesh_terms: D000368:Aged; D001281:Atrial Fibrillation / Q000000981:diagnostic imaging*; D017023:Coronary Angiography / Q000379:methods*; D004562:Electrocardiography; D005260:Female; D006339:Heart Rate; D006801:Humans; D008297:Male; D014057:Tomography, X-Ray Computed / Q000379:methods*