Moores B M, Hufton A P, Wrigley C, Asbury D L, Ramsden J A
Br J Radiol. 1979 Aug;52(620):626-33. doi: 10.1259/0007-1285-52-620-626.
A test phantom containing simulated micro-calcifications was constructed. This was imaged by seven systems suitable for use in mammography, firstly in scatter-free conditions and secondly with the addition of tissue-equivalent scattering material. The ability of the systems to resolve micro-particles of known size was assessed using the techniques of signal detection theory. The resultant receiver operating characteristic curves separated the systems into three major groups. Firstly, high resolution systems requiring high radiation dose techniques; secondly at the other extreme, a mediocre imaging system producing its results at low radiation levels; and thirdly a larger middle group producing intermediate resolution of fine particles at similar, acceptable dose levels. The ability to image small particles does not increase linearly with the radiation dose. Scatter did not affect all of the systems to the same extent.
构建了一个包含模拟微钙化的测试体模。用七个适用于乳腺摄影的系统对其进行成像，首先是在无散射条件下，其次是添加了组织等效散射材料的情况下。使用信号检测理论技术评估了这些系统分辨已知大小微粒的能力。由此得到的接收器工作特性曲线将这些系统分为三大类。首先，高分辨率系统需要高辐射剂量技术；其次，在另一个极端，一个中等成像系统在低辐射水平下产生结果；第三，一个较大的中间组在相似的可接受剂量水平下对细颗粒产生中等分辨率。对小颗粒成像的能力并不随辐射剂量呈线性增加。散射对所有系统的影响程度并不相同。
