Efstathopoulos E P, Costaridou L, Kocsis O, Panayiotakis G
Department of Medical Physics, School of Medicine, University of Patras, GR 26500 Patras, Greece.
Br J Radiol. 2001 Sep;74(885):841-6. doi: 10.1259/bjr.74.885.740841.
Medical film digitizers play an important transitory role as digital-to-analogue bridges in radiology. Their use requires performance evaluation to assure medical image quality. A complete quality control protocol is presented, based on a set of test objects adaptable to the specification of various digitizers. The protocol includes parameters such as uniformity, input-output response, noise, geometric distortion, spatial resolution, low contrast discrimination, film slippage and light leakage, as well as associated measurement methods. The applicability of the protocol is demonstrated with two types of medical film digitizers; a charge-coupled device (CCD) digitizer and a laser digitizer. The potential value of the protocol is also discussed.
医学胶片数字化仪在放射学中作为数字到模拟的桥梁发挥着重要的过渡作用。其使用需要进行性能评估以确保医学图像质量。本文提出了一个完整的质量控制方案，该方案基于一组适用于各种数字化仪规格的测试对象。该方案包括均匀性、输入输出响应、噪声、几何失真、空间分辨率、低对比度辨别力、胶片滑动和漏光等参数以及相关的测量方法。通过两种类型的医学胶片数字化仪，即电荷耦合器件（CCD）数字化仪和激光数字化仪，证明了该方案的适用性。还讨论了该方案的潜在价值。
