Evaluation of the specific absorption rate among patients undergoing brain magnetic resonance imaging using 1.5 Tesla and 3 Tesla magnetic resonance imaging Machines in King Khalid University Hospital, Saudi Arabia.

IF 0.8 4区环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES

Radiation protection dosimetry Pub Date : 2026-07-06 DOI:10.1093/rpd/ncag021

Meaad M Almusined, Abdulaziz S Alshabibi, Noor Alkhaibari

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引用次数: 0

Abstract

Magnetic Resonance Imaging (MRI) exposes patients to radiofrequency energy measured by the specific absorption rate (SAR), a key safety metric. This study aimed to compare SAR values in brain MRI scans performed at 1.5 Tesla (T) and 3 T to inform safer imaging practices. A retrospective analysis of 200 adult brain MRI scans (100 at 1.5 T and 100 at 3 T) from King Khalid University Hospital was conducted. Data included SAR, demographics, scan parameters, and contrast use. Statistical tests assessed differences (P < .05). Brain SAR was significantly higher in 1.5 T scans (mean = 3.01 W/kg) than in 3 T (mean = 1.37 W/kg). Higher SAR values were noted in females and younger patients. Factors like image type, sequence, weight, flip angle, and contrast use significantly impacted SAR. SAR is more influenced by imaging parameters and patient characteristics than MRI magnetic field strength. Personalized MRI protocols and SAR monitoring are essential for patient safety.

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沙特阿拉伯哈立德国王大学医院1.5 Tesla和3 Tesla磁共振成像仪行脑磁共振成像患者的比吸收率评价

磁共振成像（MRI）将患者暴露在射频能量下，通过特定吸收率（SAR）来测量，这是一个关键的安全指标。本研究旨在比较1.5特斯拉(T)和3特斯拉(T)时脑MRI扫描的SAR值，以告知更安全的成像实践。回顾性分析了哈立德国王大学医院200例成人脑MRI扫描（100例在1.5 T和100例在3 T）。数据包括SAR、人口统计学、扫描参数和造影剂使用。统计检验评估差异(P

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来源期刊

Radiation protection dosimetry 环境科学-公共卫生、环境卫生与职业卫生

CiteScore

1.40

自引率

10.00%

发文量

223

审稿时长

6-12 weeks

期刊介绍： Radiation Protection Dosimetry covers all aspects of personal and environmental dosimetry and monitoring, for both ionising and non-ionising radiations. This includes biological aspects, physical concepts, biophysical dosimetry, external and internal personal dosimetry and monitoring, environmental and workplace monitoring, accident dosimetry, and dosimetry related to the protection of patients. Particular emphasis is placed on papers covering the fundamentals of dosimetry; units, radiation quantities and conversion factors. Papers covering archaeological dating are included only if the fundamental measurement method or technique, such as thermoluminescence, has direct application to personal dosimetry measurements. Papers covering the dosimetric aspects of radon or other naturally occurring radioactive materials and low level radiation are included. Animal experiments and ecological sample measurements are not included unless there is a significant relevant content reason.