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Updated: Sep 19, 2025

Whole-body PET/MRI of Pediatric Patients: The Details That Matter

Whole-body PET/MRI of Pediatric Patients: The Details That Matter

Published on: December 19, 2017

在儿科PET/MR成像中减少F-FDG剂量的评估通过随机下降采样

Xiaoyue Tan¹, Yongrong Zhou¹, Qing Zhang¹

¹PET Center, Department of Nuclear Medicine, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, 106 Zhongshan Er Road, Guangzhou, 510080, China.

Annals of nuclear medicine

|June 17, 2025

概括

减少F-FDG剂量在儿科PET/MR成像中是可行的. 通过0.74MBq/kg的低剂量实现了临床上可接受的图像质量,使得FDG-avid病变的识别成为可能.

科学领域:

医疗成像医学成像
核医学就是核医学.
放射化学放射化学是指辐射化学.

背景情况:

F-FDG PET/MR成像对于儿科诊断至关重要.
优化辐射追踪剂量对于尽量减少儿童辐射暴露至关重要.
之前的研究已经探索了成人PET成像中的剂量降低,但儿科数据有限.

研究的目的:

评估在儿科PET/MR成像中降低F-FDG剂量的可行性.
评估剂量减少对图像质量和病变检测能力的影响.
为了确定儿科PET/MR检查的最低有效F-FDG剂量.

主要方法:

对44名儿童患者 (年龄范围为1-17岁) 的回顾性分析,这些患者接受了F-FDG PET/MR.
模拟剂量减少到全剂量的1/2,1/3,1/4,1/10和1/20 (2.96 MBq/kg),使用随机下降采样.
对图像质量的主观视觉评估以及与全剂量参考相比,病变和背景吸收的定量分析.

主要成果:

对于1/2,1/3和1/4剂量组,主观图像质量在临床上是可以接受的 (得分≥3).
所有的FDG-avid病变都可以在1/2,1/3和1/4剂量组中识别,类似于全剂量组.
虽然血池和肝脏SUVmax/SD随着剂量减少而增加,但SUVmean仍然可比. 与全剂量 (p < 0.05) 相比,在剂量1/2-1/20时,在病变SUVmax/SD和病变与背景比率上发现了显著的差异.

结论:

减少F-FDG活动对于儿科PET/MR扫描是可行的.
低剂量0.74 MBq/kg可以达到临床上可接受的图像质量.
这种剂量降低策略可以尽量减少儿科患者的辐射暴露,而不会影响诊断的准确性.

关键词:

在18F-FDG中.低剂量的低剂量聚乙烯 (PET) /MR (MR) 是一种儿科儿科儿科

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相关概念视频

Positron Emission Tomography

Positron Emission Tomography

Positron emission tomography (PET) is a medical imaging technique involving radiopharmaceuticals — substances that emit short-lived radiation. Although the first PET scanner was introduced in 1961, it took 15 more years before radiopharmaceuticals were combined with the technique and revolutionized its potential.
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body...