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

Abstract

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

CLC Number:

R 563.14

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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Study on radiation dose and image quality of dual-source CT FLASH scanning in very elderly patients with viral pneumonia: a retrospective study

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