Radiology:高分辨率CT在支架内再狭窄的价值

2018-11-15 shaosai MedSci原创

本研究旨在验证高分辨率(HSR)CT以0.25mm层厚评价肾动脉狭窄支架植入术后再狭窄的价值。

本研究旨在验证高分辨率(HSR)CT以0.25mm层厚评价肾动脉狭窄支架植入术后再狭窄的价值。

本研究分别以HSR CT和传统CT进行0.05mm假体和肾支架内不同程度再狭窄血管模型进行扫描。有线假体被用来分析调制传递函数(MTF)。而血管假体,计算错误率并作为测量值和实际值的整体差异。定量评价中,整体图像质量和评价不同狭窄的诊断准确性由两位放射科医生进行评价。采用配对T检验、Wilcoxon符号等级检验和McNemar检验进行统计学分析。

结果为,在10%和2%MTF中,HSR CT分别得到24.3线对/分钟± 0.5、29.1线对/分钟± 0.4;而传统CT分别得到12.5线对/分钟±0.1、14.3线对/分钟±0.1。HSR CT测量直径的平均错误率(8.0% ± 5.8)要影响低于传统CT(16.9% ± 9.3; P < .001)。HSR CT图像质量要明显高于传统CT (P < .001),但是HSR CT在诊断准确率方面并不由于传统CT。

本研究表明,与传统CT相比,高分辨率CT能够在2%调制转移函数中得到分别率高达29线对,提高了肾动脉支架植入术后再狭窄诊断评价的准确率。

原始出处:

Onishi H, Hori M, Ota T. et al.Phantom Study of In-Stent Restenosis at High-Spatial-Resolution CT.Radiology.DOI:10.1148/radiol.2018180188

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    2019-05-13 lsndxfj
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