Cruty M R, Ghilardi-Netto T
Med Phys. 1980 Mar-Apr;7(2):151-6. doi: 10.1118/1.594786.
The spectral response of several Wisconsin Mammographic kVp cassettes was measured under various diagnostic conditions. The response for both unfiltered and externally filtered x-ray beams from tungsten and molybdenum target tubes with different tube voltage ripple was studied for single phase x-ray units. The response for a three phase generator with a molybdenum target tube was also measured. The maximum difference between these experimental response curves and the manufacturer's cassette calibration curve was 3.5 kVp for cassettes with Cu + Al step wedges and 6.0 kVp for cassettes with Cu + Ni step wedges under these widely different spectral conditions. The average difference between the experimental results and the manufacturer's calibration was +2 kVp for Cu + Al step wedge cassettes and +/- 3.5 kVp for Cu + Ni cassettes. kVp measurements were made with an NBS calibrated voltage divider.
在各种诊断条件下，对几种威斯康星乳腺摄影千伏级暗盒的光谱响应进行了测量。研究了来自具有不同管电压纹波的钨靶和钼靶管的未过滤和外部过滤X射线束对单相X射线装置的响应。还测量了带有钼靶管的三相发生器的响应。在这些差异很大的光谱条件下，对于带有铜 + 铝阶梯楔形块的暗盒，这些实验响应曲线与制造商暗盒校准曲线之间的最大差值为3.5千伏峰值，对于带有铜 + 镍阶梯楔形块的暗盒为6.0千伏峰值。对于铜 + 铝阶梯楔形块暗盒，实验结果与制造商校准之间的平均差值为 +2千伏峰值，对于铜 + 镍暗盒为±3.5千伏峰值。千伏峰值测量使用经美国国家标准局校准的分压器进行。
