胸腹骨盆CT扫描地形图对剂量指数和图像质量的影响

IF 1.4 4区医学 Q4 ENVIRONMENTAL SCIENCES

Radioprotection Pub Date : 2022-01-01 DOI:10.1051/radiopro/2022026

D. Hadipour, A. Monfared, A. Ebrahiminia, K. Gorji, N. Ghaemian, F. Niksirat

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引用次数: 0

摘要

本研究旨在探讨不同地形图(正位图和双侧位图)对患者剂量指数和胸腹骨盆CT图像质量的影响。分析60例胸部和60例腹部-骨盆CT扫描的尺寸特异性剂量估计(SSDE)、体积CT剂量指数(CTDIvol)、毫安秒(mAs)、有效剂量以及信噪比(SNR)和对比噪声比(CNR)。胸部CT双拓扑图显著降低SSDE、mAs、CTDIvol及有效剂量(p < 0.05)。两组胸部CT CNR参数比较差异无统计学意义(p < 0.05)，腹盆腔CT SNR参数比较差异无统计学意义(p < 0.05)，均可诊断。在胸部CT中使用双拓扑图是一种在不降低图像质量的情况下降低剂量指标的有效方法。

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The role of topogram views on dose indices and image quality in thorax and abdomen-pelvis CT scan

This study was designed to investigate the effect of the different topograms (AP and dual AP/Lateral) on patient dose indices and image quality in thorax and abdomen-pelvis CT. Size-specific dose estimation (SSDE), volumetric CT dose index (CTDIvol), milliampere seconds (mAs), effective dose, as well as signal to noise ratio (SNR) and contrast to noise ratio (CNR) of 60 thorax and 60 abdomen-pelvis CT scans were analyzed. In thorax CT, SSDE, mAs, CTDIvol and effective dose were significantly reduced by using dual topograms (p < 0.05) but not significantly reduced in abdominal-pelvic scans (p > 0.05). There was no significant difference between CNR parameter in the two groups for thorax CT (p > 0.05) and SNR parameter in abdomen-pelvic CT (p < 0.05) and all images were diagnostically acceptable. The use of two topograms in thorax CT is an efficient approach to reduce dose indices without decreasing the image quality.

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来源期刊

Radioprotection ENVIRONMENTAL SCIENCES-PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH

CiteScore

3.30

自引率

54.50%

发文量

审稿时长

>12 weeks

期刊介绍： Radioprotection publishes articles on all aspects of radiological protection, including non-ionising as well as ionising radiations. Fields of interest range from research, development and theory to operational matters, education and training. The very wide spectrum of its topics includes (theoretical and practical aspects): dosimetry, instrument development, specialized measuring techniques, epidemiology, biological effects (in vivo and in vitro) and risk and environmental impact assessments.