Assessment of image quality and establishment of local acceptable quality dose for computed tomography based on patient effective diameter.

IF 1.9 Q3 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Journal of Medical Imaging Pub Date : 2024-07-01 Epub Date: 2024-08-16 DOI:10.1117/1.JMI.11.4.043502

Nada Hasan, Chadia Rizk, Fatema Marzooq, Khalid Khan, Maryam AlKhaja, Esameldeen Babikir

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引用次数: 0

Abstract

Purpose: We aim to develop modified clinical indication (CI)-based image quality scoring criteria (IQSC) for assessing image quality (IQ) and establishing acceptable quality doses (AQDs) in adult computed tomography (CT) examinations, based on CIs and patient sizes.

Approach: CT images, volume CT dose index ( ${CTDI}_{vol}$ ), and dose length product (DLP) were collected retrospectively between September 2020 and September 2021 for eight common CIs from two CT scanners at a central hospital in the Kingdom of Bahrain. Using the modified CI-based IQSC and a Likert scale (0 to 4), three radiologists assessed the IQ of each examination. AQDs were then established as the median value of ${CTDI}_{vol}$ and DLP for images with an average score of 3 and compared to national diagnostic reference levels (NDRLs).

Results: Out of 581 examinations, 60 were excluded from the study due to average scores above or below 3. The established AQDs were lower than the NDRLs for all CIs, except $AQDs / {CTDI}_{vol}$ for oncologic follow-up for large patients (28 versus 26 mGy) in scanner A, besides abdominal pain for medium patients (16 versus 15 mGy) and large patients (34 versus 27 mGy), and diverticulitis/appendicitis for medium patients (15 versus 12 mGy) and large patients (33 versus 30 mGy) in scanner B, indicating the need for optimization.

Conclusions: CI-based IQSC is crucial for IQ assessment and establishing AQDs according to patient size. It identifies stations requiring optimization of patient radiation exposure.

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根据患者有效直径评估图像质量并确定计算机断层扫描的局部可接受质量剂量。

目的：我们旨在根据临床适应症（CI）和患者规模，制定基于临床适应症（CI）的图像质量评分标准（IQSC），用于评估图像质量（IQ）和确定成人计算机断层扫描（CT）检查的可接受质量剂量（AQD）：巴林王国一家中心医院的两台 CT 扫描仪在 2020 年 9 月至 2021 年 9 月期间对八种常见 CI 的 CT 图像、容积 CT 剂量指数（CTDI vol）和剂量长度乘积（DLP）进行了回顾性收集。三位放射科医生使用修改后的基于 CI 的 IQSC 和李克特量表（0 至 4）评估了每次检查的 IQ。然后将平均得分为 3 分的图像的 CTDI vol 和 DLP 的中值确定为 AQD，并与国家诊断参考水平 (NDRL) 进行比较：在 581 次检查中，有 60 次由于平均得分高于或低于 3 分而被排除在研究之外。除了扫描仪 A 中大型患者肿瘤随访的 AQDs / CTDI vol（28 对 26 mGy）、中型患者腹痛（16 对 15 mGy）和大型患者腹痛（34 对 27 mGy）以及扫描仪 B 中型患者憩室炎/阑尾炎（15 对 12 mGy）和大型患者憩室炎/阑尾炎（33 对 30 mGy）的 AQDs / CTDI vol 低于国家诊断参考水平（NDRLs）外，所有 CI 的既定 AQDs 均低于国家诊断参考水平（NDRLs），表明需要进行优化：基于 CI 的 IQSC 对于根据患者体型评估 IQ 和确定 AQD 至关重要。结论：基于 CI 的 IQSC 对智商评估和根据患者体型确定 AQD 至关重要，它能确定需要优化患者辐照的扫描站。

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

Journal of Medical Imaging RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING-

CiteScore

4.10

自引率

4.20%

发文量

期刊介绍： JMI covers fundamental and translational research, as well as applications, focused on medical imaging, which continue to yield physical and biomedical advancements in the early detection, diagnostics, and therapy of disease as well as in the understanding of normal. The scope of JMI includes: Imaging physics, Tomographic reconstruction algorithms (such as those in CT and MRI), Image processing and deep learning, Computer-aided diagnosis and quantitative image analysis, Visualization and modeling, Picture archiving and communications systems (PACS), Image perception and observer performance, Technology assessment, Ultrasonic imaging, Image-guided procedures, Digital pathology, Biomedical applications of biomedical imaging. JMI allows for the peer-reviewed communication and archiving of scientific developments, translational and clinical applications, reviews, and recommendations for the field.