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320排CT扫描仪上用于冠状动脉CT血管造影的双感兴趣区团注追踪技术：减少患者间动脉对比剂增强的变异性

Dual-region-of-interest bolus-tracking technique for coronary computed tomographic angiography on a 320-row scanner: reduction in the interpatient variability of arterial contrast enhancement.

作者信息

Kai Noriyuki, Oda Seitaro, Utsunomiya Daisuke, Nakaura Takeshi, Funama Yoshinori, Kidoh Masafumi, Taguchi Narumi, Iyama Yuji, Nagayama Yasunori, Hirata Kenichiro, Yuki Hideaki, Sakabe Daisuke, Hatemura Masahiro, Yamashita Yasuyuki

机构信息

1 Department of Central Radiology, Kumamoto University Hospital, Kumamoto, Japan.

2 Department of Diagnostic Radiology, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan.

出版信息

Br J Radiol. 2018 Jan;91(1081):20170541. doi: 10.1259/bjr.20170541. Epub 2017 Nov 8.

DOI:10.1259/bjr.20170541
PMID:29072853
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5966218/
Abstract

OBJECTIVE

We compared the effect of a dual-region-of-interest (ROI) bolus-tracking technique on interpatient variability of arterial contrast enhancement with that of the conventional bolus-tracking technique in coronary computed tomographic angiography (CTA) on a 320-row scanner.

METHODS

This study included 100 patients who underwent coronary CTA using one of two protocols: (1) 50 patients underwent scanning using a conventional single-ROI bolus-tracking technique (P-single) with an ROI placed in the ascending aorta, and (2) 50 patients underwent scanning using a dual-ROI technique (P-dual) with two ROIs placed in the pulmonary trunk and the ascending aorta. CT attenuation in the ascending aorta and coronary arteries, and the interpatient variability were compared between the two scanning protocols.

RESULTS

The mean CT attenuation of the ascending aorta and coronary arteries tended to be higher for P-dual than for P-single, but the difference was not significant (p = 0.08-0.30). The interpatient variability of contrast enhancement (SD of the CT attenuation) was significantly smaller for P-dual than for P-single (p < 0.01).

CONCLUSION

The dual-ROI bolus-tracking technique can reduce interpatient variability of arterial contrast enhancement in coronary CTA on a 320-row scanner. Advances in knowledge: The use of a dual-ROI bolus-tracking technique can provide sufficient and consistent arterial enhancement of coronary CTA.

摘要

目的

我们在320排CT扫描仪上，比较了双感兴趣区（ROI）团注追踪技术与传统团注追踪技术对冠状动脉CT血管造影（CTA）患者间动脉对比增强变异性的影响。

方法

本研究纳入100例行冠状动脉CTA的患者，采用两种方案之一：（1）50例患者使用传统的单ROI团注追踪技术（P-单）进行扫描，ROI置于升主动脉；（2）50例患者使用双ROI技术（P-双）进行扫描，两个ROI分别置于肺动脉主干和升主动脉。比较两种扫描方案之间升主动脉和冠状动脉的CT衰减以及患者间变异性。

结果

P-双组升主动脉和冠状动脉的平均CT衰减倾向于高于P-单组，但差异无统计学意义（p = 0.08 - 0.30）。P-双组对比增强的患者间变异性（CT衰减的标准差）显著小于P-单组（p < 0.01）。

结论

双ROI团注追踪技术可降低320排CT扫描仪上冠状动脉CTA患者间动脉对比增强的变异性。知识进展：使用双ROI团注追踪技术可提供足够且一致的冠状动脉CTA动脉增强。

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