双源CT FLASH扫描技术在高龄病毒性肺炎病人中的辐射剂量与图像质量优势:一项回顾性比较研究

doi:10.3969/j.issn.1003-9198.2025.12.017

摘要/Abstract

摘要： 目的比较双源CT(dual-source CT,DSCT)的FLASH Thorax扫描与常规Thorax扫描在高龄病毒性肺炎病人中的辐射剂量、图像质量及扫描效率,探讨DSCT的FLASH Thorax扫描技术在临床影像评估中的优势。方法回顾性纳入153例高龄病毒性肺炎病人,其中60例使用DSCT FLASH Thorax进行扫描,93例使用常规Thorax扫描。比较2组扫描时间、容积CT剂量指数(computed tomography dose index volume,CTDIvol)、剂量长度乘积(dose-length product,DLP)、辐射剂量、图像质量及病灶诊断能力的差异。结果 DSCT FLASH组的扫描时间显著短于常规Thorax组(P<0.01)。在辐射剂量方面,DSCT FLASH组的CTDIvol、DLP和辐射有效剂量(ED)均显著低于常规Thorax组(P<0.05)。DSCT FLASH组的主观图像质量评分及客观质量指标包括信噪比(SNR)和对比噪声比(CNR)均显著优于常规Thorax组(P<0.05),且病灶诊断能力高于常规Thorax组。结论与常规Thorax扫描相比,FLASH扫描技术在高龄病毒性肺炎病人中显示出更短的扫描时间、更低的辐射剂量以及更优的图像质量。

关键词: 双源CT FLASH, 病毒性肺炎, 老年人, 图像质量, 辐射剂量

Abstract: Objective To compare the radiation dose, image quality, and scanning efficiency between dual-source CT FLASH Thorax scan and conventional Thorax scan in very elderly patients with viral pneumonia, and to explore the potential advantages of FLASH scanning in clinical imaging evaluation. Methods This retrospective study included 153 very elderly patients with viral pneumonia, of which 60 patients underwent scanning with dual-source CT FLASH technology, and 93 patients received conventional Thorax scans. The differences in scanning time, computed tomography dose index volume (CTDIvol), dose-length product (DLP), radiation dose, image quality, and lesion diagnosis value between the two groups were analyzed. Results The scanning time in the dual-source CT FLASH group was significantly shorter than that in the conventional Thorax group (P<0.01). In terms of radiation dose, the dual-source CT FLASH group showed significantly lower CTDIvol, DLP, and effective dose(ED) of radiation compared to the conventional Thorax group. The image quality scores in the dual-source CT FLASH group were significantly higher than those in the conventional Thorax group (P=0.006). The dual-source CT FLASH group exhibited superior signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR) and lesion diagnosis value compared to the conventional Thorax group. Conclusions Compared with conventional Thorax scaning, FLASH scanning shows shorter scan times, lower radiation doses, and superior image quality in very elderly patients with viral pneumonia.

Key words: dual-source CT FLASH, viral pneumonia, aged, image quality, radiation dose

中图分类号:

R 563.14

董楠, 顾艺杰. 双源CT FLASH扫描技术在高龄病毒性肺炎病人中的辐射剂量与图像质量优势:一项回顾性比较研究[J]. 实用老年医学, 2025, 39(12): 1274-1278.

DONG Nan, GU Yijie. Study on radiation dose and image quality of dual-source CT FLASH scanning in very elderly patients with viral pneumonia: a retrospective study[J]. Practical Geriatrics, 2025, 39(12): 1274-1278.

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