Poletti J L, Le Heron J C
National Radiation Laboratory, Christchurch, New Zealand.
Br J Radiol. 1988 May;61(725):393-400. doi: 10.1259/0007-1285-61-725-393.
The protocol for image intensifier (II) quality assurance recommended by the UK Hospital Physicists' Association (HPA) and the UK Department of Health and Social Security has been adapted for use in New Zealand for assessment of such systems. Test objects were constructed at the National Radiation Laboratory to match the specifications of those recommended by the HPA. Over 100 individual surveys have been made and, in a few cases, machines have been surveyed several times. Results are summarized in terms of key parameters: II input dose rate, low-contrast detectability, contrast-detail performance and limiting resolution. These are given as mean and standard deviation, and also as good, average or poor. Video waveforms, conversion factors and modulation transfer functions have also been determined on a number of systems. In several cases, video voltages were found to be seriously maladjusted.
英国医院物理师协会（HPA）和英国卫生与社会保障部推荐的影像增强器（II）质量保证协议已被改编用于新西兰，以评估此类系统。国家辐射实验室按照HPA推荐的规格制作了测试物体。已经进行了100多次单独检测，在少数情况下，对机器进行了多次检测。结果按照关键参数进行总结：II输入剂量率、低对比度可探测性、对比度细节性能和极限分辨率。这些参数以均值和标准差给出，也分为优、中、差。还在一些系统上测定了视频波形、转换因子和调制传递函数。在几种情况下，发现视频电压严重失调。
