To provide an objective way of measuring image quality, a computer program was designed that automatically analyzes the test images of a contrast-detail (CD) phantom. The program gives a quantified measurement of image quality by calculating an Image Quality Figure (IQF). The aim of this work was to evaluate the program and adjust it to clinical situations in order to find the detectable level where the program gives a reliable figure of the contrast resolution. The program was applied on a large variety of images with lumbar spine and urographic parameters, from very low to very high image qualities. It was shown that the computer program produces IQFs with small variations and there were a strong linear statistical relation between the computerized evaluation and the evaluation performed by human observers (>R2 = 0.98). This method offers a fast and easy way of conducting image quality evaluations.
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机译：为了提供一种客观的测量图像质量的方法，设计了一种计算机程序，该程序可以自动分析对比度（CD）体模的测试图像。该程序通过计算图像质量指数（IQF）给出图像质量的量化度量。这项工作的目的是评估程序，并根据临床情况进行调整，以找到可检测的水平，其中程序可提供可靠的对比度分辨率数值。该程序应用于从腰椎和尿路造影参数出发的各种图像，从非常低的图像质量到非常高的图像质量。结果表明，该计算机程序产生的IQF差异很小，并且计算机评估与观察者进行的评估之间存在很强的线性统计关系（> R 2 = 0.98 ）。该方法提供了进行图像质量评估的快速简便的方法。
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