Quantitative and qualitative evaluation of the Wide Volume (WV) versus Helical acquisition on a 320-detector row computed tomography for the exploration of the abdominopelvic region in adults

Diagnostic imaging Pub Date : 2017-01-01 DOI:10.15761/rdi.1000116

C. Roy, R. Quin, A. Labani, P. Leyendecker, L. Mertz, M. Ohana

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引用次数: 2

Abstract

Purpose: To evaluate the best protocol to be used in WV mode for the abdominopelvic region in terms of radiation dose and image quality by comparison with the helical mode. Methods and materials: This study was performed on a 320 x 0.5 mm detector row CT unit. By using several simulations on topograms data and phantoms analysis, we registered CTDIvol. Then, a clinical study on CTUrography was performed, each patient being its own standard. Results: The collimation of 10 cm (200 x 0.5 mm) with 5 volumes had the lowest CTDIvol. This can be explained by several physical phenomena. In the clinical study, the average radiation dose reduction was found to be at 44.03% ± 0.36% (p<0.001). Concerning the qualitative evaluation of the stitching of different volumes and the overall image quality, it was found excellent. Conclusion: Wide Volume CT scanning using 5 volumes of 10cm (200x0.5mm) significantly reduces the radiation dose with an excellent image quality. Correspondence to: Catherine Roy, Department of Radiology, University Hospital of Strasbourg – New Civil Hospital, Strasbourg Cedex, France; Tel: +333369550731; Fax: +3333691815; E-mail: catherine.roy@chru-strasbourg.fr

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定量和定性评价宽体积(WV)和螺旋采集在320个检测器行计算机断层扫描上用于成人腹部骨盆区域的探测

目的:通过与螺旋模式的比较，从辐射剂量和图像质量方面评价WV模式在腹骨盆区域的最佳方案。方法和材料:本研究在320 x 0.5 mm检测器行CT装置上进行。通过对地形图数据的多次模拟和幻影分析，我们注册了CTDIvol。然后进行ct临床研究，每个患者都有自己的标准。结果:5片10 cm (200 × 0.5 mm)的准直层CTDIvol最低。这可以用几种物理现象来解释。在临床研究中，平均辐射剂量降低率为44.03%±0.36% (p<0.001)。在对不同体积的拼接和整体图像质量进行定性评价时，认为该方法是优秀的。结论:5个10cm (200x0.5mm)的宽体积CT扫描可显著降低辐射剂量，图像质量良好。通信对象:Catherine Roy，斯特拉斯堡大学医院放射科-法国斯特拉斯堡新民用医院;电话:+ 333369550731;传真:+ 3333691815;电子邮件:catherine.roy@chru-strasbourg.fr

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Diagnostic imaging

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