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基于任务的图像质量测量及其与辐射剂量和患者风险的关系。

Task-based measures of image quality and their relation to radiation dose and patient risk.

作者信息

Barrett Harrison H, Myers Kyle J, Hoeschen Christoph, Kupinski Matthew A, Little Mark P

机构信息

College of Optical Sciences, University of Arizona, Tucson, AZ 85721, USA. Center for Gamma-Ray Imaging, Department of Medical Imaging, University of Arizona, Tucson, AZ 85724, USA.

出版信息

Phys Med Biol. 2015 Jan 21;60(2):R1-75. doi: 10.1088/0031-9155/60/2/R1. Epub 2015 Jan 7.

Abstract

The theory of task-based assessment of image quality is reviewed in the context of imaging with ionizing radiation, and objective figures of merit (FOMs) for image quality are summarized. The variation of the FOMs with the task, the observer and especially with the mean number of photons recorded in the image is discussed. Then various standard methods for specifying radiation dose are reviewed and related to the mean number of photons in the image and hence to image quality. Current knowledge of the relation between local radiation dose and the risk of various adverse effects is summarized, and some graphical depictions of the tradeoffs between image quality and risk are introduced. Then various dose-reduction strategies are discussed in terms of their effect on task-based measures of image quality.

摘要

本文在电离辐射成像的背景下回顾了基于任务的图像质量评估理论,并总结了图像质量的客观品质因数(FOM)。讨论了FOM随任务、观察者的变化,特别是随图像中记录的平均光子数的变化。然后回顾了指定辐射剂量的各种标准方法,并将其与图像中的平均光子数相关联,进而与图像质量相关联。总结了局部辐射剂量与各种不良反应风险之间关系的当前知识,并介绍了一些图像质量与风险之间权衡的图形描述。然后根据各种剂量降低策略对基于任务的图像质量测量的影响进行了讨论。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f59/4318357/4ed67ef24004/nihms655776f1.jpg

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