Maeda Eriko, Yamamoto Kodai, Kanno Shigeaki, Ino Kenji, Tomizawa Nobuo, Akahane Masaaki, Torigoe Rumiko, Ohtomo Kuni
Department of Radiology, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
Imaging Center, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
ScientificWorldJournal. 2016;2016:1017851. doi: 10.1155/2016/1017851. Epub 2016 Feb 10.
To compare the image quality of coronary computed tomography angiography (CCTA) acquired under two conditions: 75% fixed as the acquisition window center (Group 75%) and the diagnostic phase for calcium scoring scan as the center (CS; Group CS).
320-row cardiac CT with a minimal acquisition window (scanned using "Target CTA" mode) was performed on 81 patients. In Group 75% (n = 40), CS was obtained and reconstructed at 75% and the center of the CCTA acquisition window was set at 75%. In Group CS (n = 41), CS was obtained at 75% and the diagnostic phase showing minimal artifacts was applied as the center of the CCTA acquisition window. Image quality was evaluated using a four-point scale (4-excellent) and the mean scores were compared between groups.
The CCTA scan diagnostic phase occurred significantly earlier in CS (75.7 ± 3.2% vs. 73.6 ± 4.5% for Groups 75% and CS, resp., p = 0.013). The mean Group CS image quality score (3.58 ± 0.63) was also higher than that for Group 75% (3.19 ± 0.66, p < 0.0001).
The image quality of CCTA in Target CTA mode was significantly better when the center of acquisition window is adjusted using CS.
比较在两种条件下获得的冠状动脉计算机断层扫描血管造影（CCTA）的图像质量：以75%固定为采集窗口中心（75%组）和以钙化积分扫描的诊断期为中心（CS组；CS组）。
对81例患者进行具有最小采集窗口的320排心脏CT（使用“目标CTA”模式扫描）。在75%组（n = 40）中，以75%获得并重建钙化积分，且CCTA采集窗口的中心设定为75%。在CS组（n = 41）中，以75%获得钙化积分，并将显示最小伪影的诊断期用作CCTA采集窗口的中心。使用四点量表（4 - 优秀）评估图像质量，并比较两组的平均得分。
CS组的CCTA扫描诊断期显著更早（75%组和CS组分别为75.7 ± 3.2%和73.6 ± 4.5%，p = 0.013）。CS组的平均图像质量得分（3.58 ± 0.63）也高于75%组（3.19 ± 0.66，p < 0.0001）。
当使用钙化积分调整采集窗口中心时，目标CTA模式下CCTA的图像质量显著更好。
