Barnes G T, Brezovich I A, Witten D M
AJR Am J Roentgenol. 1977 Sep;129(3):497-501. doi: 10.2214/ajr.129.3.497.
A scanning multiple slit assembly consisting of an array of long narrow beam-defining slits coupled with scatter-eliminating slots beneath the patient is a feasible, practical, and efficient method of reducing scatter and increasing contrast and image quality in diagnostic radiology. Measurements of the ratio of scattered-to-primary radiation transmitted by a scanning multiple slit assembly and a conventional high ratio grid under similar conditions showed the relative intensity of scatter transmitted by the slit assembly to be only one-third that of the grid. A noticeable improvement in contrast was obtained using the slit assembly, without increase in patient exposure. The design, construction, and clinical implications of such a scatter-eliminating technique are discussed.
一种扫描多狭缝组件，它由一系列狭长的束流限定狭缝阵列以及位于患者下方的散射消除狭缝组成，是一种在诊断放射学中减少散射、增加对比度和图像质量的可行、实用且高效的方法。在相似条件下，对扫描多狭缝组件和传统高比值格栅所透射的散射辐射与原发射线的比率进行测量，结果表明狭缝组件所透射的散射相对强度仅为格栅的三分之一。使用狭缝组件可显著提高对比度，且不会增加患者的辐射剂量。本文讨论了这种散射消除技术的设计、构造及临床意义。
