Size specific dose estimates for adult patients in CT of the Kidney, Ureters, and Bladder (KUB) based on effective diameter and water equivalent diameter

IF 2.8 3区物理与天体物理 Q3 CHEMISTRY, PHYSICAL

Radiation Physics and Chemistry Pub Date : 2025-01-08 DOI:10.1016/j.radphyschem.2025.112523

Khaled Alenazi , Haitham Alahmad , Salman Albeshan , Meshari Almeshari , Ahmad Abanomy

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引用次数: 0

Abstract

CT KUB (kidneys, ureters, bladder) is the gold standard for evaluating urinary disorders. Known for its diagnostic accuracy, CT KUB is crucial for detecting renal stones. However, high radiation doses require accurate dose estimation methods to ensure safety and effectiveness in clinical practice. This study evaluates and studies the correlation in size-specific dose estimates (SSDE) for CT KUB based on effective (D_eff) and water-equivalent (D_w) diameters. SSDE values based on Deff and Dw were calculated for 254 patients who underwent CT KUB examinations using IndoseCT software. Patients were categorized into three groups based on body size diameters: <30, 30–35, and >35 cm. The average SSDE values for D_eff and D_w were determined, and their correlation was analyzed using linear regression. The mean SSDE_eff and SSDE_w were 10.47 mGy and 10.55 mGy, respectively. As body size increased, CTDI_vol and DLP values rose by 1.6 and 1.5 times, respectively, from thinner to thicker patients. A strong positive correlation between D_eff and D_w (R² = 0.9567) was observed, with minimal differences between average values of SSDE_eff and SSDE_w. These findings suggest that water-equivalent and effective diameters are comparable for CT KUB scans, allowing clinicians to use either metric for radiation dose estimation. CTDI_vol significantly underestimates radiation dose in smaller patients, emphasizing the importance of using SSDE_eff or SSDE_w for accurate dose assessment.

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基于有效直径和水当量直径的成人肾、输尿管和膀胱（KUB） CT尺寸特定剂量估计

CT KUB（肾脏、输尿管、膀胱）是评估泌尿系统疾病的金标准。CT KUB以其诊断准确性而闻名，对检测肾结石至关重要。然而，高剂量的辐射需要精确的剂量估计方法，以确保临床实践的安全性和有效性。本研究基于有效直径（Deff）和水当量直径（Dw）评估和研究CT KUB的尺寸特异性剂量估计值（SSDE）的相关性。采用IndoseCT软件计算254例行CT KUB检查的患者基于Deff和Dw的SSDE值。患者根据体径大小分为三组：30cm、30 - 35 cm和35cm。测定Deff和Dw的平均SSDE值，并采用线性回归分析其相关性。平均SSDEeff和SSDEw分别为10.47 mGy和10.55 mGy。随着体型的增加，CTDIvol和DLP值从较瘦的患者到较厚的患者分别增加了1.6倍和1.5倍。Deff与Dw呈显著正相关（R2 = 0.9567）， SSDEeff与SSDEw的平均值差异极小。这些发现表明，CT KUB扫描的水当量直径和有效直径是相当的，允许临床医生使用任何一种度量来估计辐射剂量。CTDIvol显著低估了较小患者的辐射剂量，强调了使用SSDEeff或SSDEw进行准确剂量评估的重要性。

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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来源期刊

Radiation Physics and Chemistry 化学-核科学技术

CiteScore

5.60

自引率

17.20%

发文量

574

审稿时长

12 weeks

期刊介绍： Radiation Physics and Chemistry is a multidisciplinary journal that provides a medium for publication of substantial and original papers, reviews, and short communications which focus on research and developments involving ionizing radiation in radiation physics, radiation chemistry and radiation processing. The journal aims to publish papers with significance to an international audience, containing substantial novelty and scientific impact. The Editors reserve the rights to reject, with or without external review, papers that do not meet these criteria. This could include papers that are very similar to previous publications, only with changed target substrates, employed materials, analyzed sites and experimental methods, report results without presenting new insights and/or hypothesis testing, or do not focus on the radiation effects.