Muntz E P, Welkowsky M, Kaegi E, Morsell L, Wilkinson E, Jacobson G
Radiology. 1978 May;127(2):517-23. doi: 10.1148/127.2.517.
The x-ray photon energies that give the highest signal-to-noise ratios per unit of exposure or average dose in mammography are significantly greater than those used in current film/screen systems. Optimum photon energies for detection of calcifications in a range of thicknesses of water and fat were calculated. Soft-tissue targets were also considered. Comparison of the theoretical results and those obtained experimentally with the Stanton mammography phantom indicate that operation at less than optimum photon energies is a major cause of inefficiency in film/screen mammography. On the other hand, electrostatic imaging systems, because of their processing flexibility, can operate at the optimum photon energy levels, thus minimizing either dose or exposure.
在乳腺摄影中，能产生每单位曝光量或平均剂量下最高信噪比的X射线光子能量，显著高于当前胶片/增感屏系统所使用的能量。计算了在一系列水和脂肪厚度范围内检测钙化的最佳光子能量。还考虑了软组织目标。将理论结果与使用斯坦顿乳腺摄影体模实验获得的结果进行比较表明，在低于最佳光子能量下操作是胶片/增感屏乳腺摄影效率低下的主要原因。另一方面，静电成像系统由于其处理灵活性，可以在最佳光子能量水平下运行，从而将剂量或曝光降至最低。
