Pirtle O L
Richmond Imaging Associates, Houston, Texas.
Radiol Technol. 1994 May-Jun;65(5):291-5; quiz 296-8.
Inaccurate calibrations can seriously affect the technique chart and, ultimately, affect patient exposure and the diagnostic quality of radiographs. Texas regulations require that several quality control tests, including kV accuracy, timer accuracy, mAs linearity and reproducibility, be performed on all x-ray units. This article reports the results of those tests for radiographic x-ray machines in nonhospital facilities. Of the 161 machines tested, 30% failed one or more tests. The most commonly failed test was kV accuracy, while failure of mAs linearity was the second most frequently failed test.
校准不准确会严重影响技术参数表，并最终影响患者的辐射剂量以及X光片的诊断质量。得克萨斯州的法规要求对所有X光设备进行多项质量控制测试，包括千伏值准确性、定时器准确性、毫安秒线性和重复性测试。本文报告了非医院机构中用于X光摄影的X光机的测试结果。在测试的161台机器中，30%的机器一项或多项测试未通过。最常出现测试未通过的项目是千伏值准确性，而毫安秒线性测试未通过则是第二常见的情况。
