Goldstein A
Radiology. 1976 Oct;121(1):157-62. doi: 10.1148/121.1.157.
Shifts in the displayed shades of gray were found in the initial evaluation of a gray scale ultrasound display. Quantitative measurements of these shifts were performed. These measurements, along with measurements of scan converter output and photographic exposure time, established television (TV) performance as the major cause of shifts. Random variations in photographic exposure time were shown to cause small random shifts. Recommendations are given to minimize the effects of these shifts in clinical sonograms. To minimize shifts, hardware modifications were made on a similar TV. These modifications substantially improved the TV performance.
在对灰度超声显示器的初步评估中发现了显示灰度的变化。对这些变化进行了定量测量。这些测量结果，连同扫描转换器输出和摄影曝光时间的测量结果，确定电视（TV）性能是变化的主要原因。结果表明，摄影曝光时间的随机变化会导致微小的随机变化。文中给出了将这些变化对临床超声图的影响降至最低的建议。为了将变化降至最低，在一台类似的电视上进行了硬件修改。这些修改显著改善了电视性能。
