Barnes G T, Cleare H M, Brezovich I A
Radiology. 1976 Sep;120(3):691-4. doi: 10.1148/120.3.691.
Evidence is presented that an array of long, narrow beam-defining slits scanning a patient coupled with scatter-eliminating slots beneath the patient will substantially reduce scatter in diagnostic radiology. Scatter/primary ratios and the distribution of scatter in the plane of the image detector have been measured as a function of slit width and slot depth for a long, narrow beam-defining geometry. Using these data, calculations for the scatter/primary ratio incident on the image detector are made for a multiple slit assembly and compared with conventional grids. An improvement in contrast is obtained with little or no increase in patient exposure. Design considerations for the construction of such an array and data trends are discussed.
有证据表明，一系列长而窄的束流限定狭缝对患者进行扫描，并结合患者下方的散射消除狭缝，将大大减少诊断放射学中的散射。对于长而窄的束流限定几何形状，已测量了散射/原发射线比以及图像探测器平面内的散射分布作为狭缝宽度和狭缝深度的函数。利用这些数据，计算了多狭缝组件入射到图像探测器上的散射/原发射线比，并与传统格栅进行了比较。在几乎不增加或不增加患者照射剂量的情况下，对比度得到了改善。讨论了这种阵列结构的设计考虑因素和数据趋势。
