Båth Magnus
Department of Radiation Physics, University of Gothenburg, Gothenburg SE-413 45, Sweden.
Radiat Prot Dosimetry. 2010 Apr-May;139(1-3):26-36. doi: 10.1093/rpd/ncq007. Epub 2010 Feb 10.
There are many ways in which imaging systems can be evaluated. The aim of the present paper is to provide an overview of a number of selected approaches to evaluating imaging systems, often encountered by the medical physicist, and discuss their validity and reliability. Specifically, it will cover (i) characterisation of an imaging system in terms of its detective quantum efficiency using linear-systems analysis; (ii) attempts to calculate relevant measures directly in images using the Rose model and the pixel signal-to-noise ratio; (iii) task-based methods incorporating human observers such as receiver-operating characteristics and (iv) visual grading-based methods using experienced radiologists as observers.
有多种方法可用于评估成像系统。本文旨在概述医学物理学家经常遇到的一些评估成像系统的选定方法，并讨论其有效性和可靠性。具体而言，它将涵盖：(i) 使用线性系统分析根据其探测量子效率对成像系统进行表征；(ii) 尝试使用罗斯模型和像素信噪比直接在图像中计算相关度量；(iii) 纳入人类观察者的基于任务的方法，如接收者操作特征；以及 (iv) 以经验丰富的放射科医生为观察者的基于视觉分级的方法。
