Panzer W, Widenmann L
Radiography. 1983 Jun;49(582):141-5.
The most common method of scatter reduction is the use of an antiscatter grid. Its disadvantage is the absorption of a certain percentage of primary radiation in the lead strips of the grid and the fact that due to the limited thickness of the lead strips their scatter absorption is also limited. A possibility for avoiding this disadvantage is offered by the so-called slot technique, ie, the successive exposure of the subject with a narrow fan beam provided by slots in rather thick lead plates. In this paper the results of a comparison between grid and slot technique regarding dose to the patient, scatter reduction, image quality and the effect of automatic exposure control are reported.
减少散射的最常见方法是使用防散射格栅。其缺点是格栅的铅条会吸收一定比例的原发射线，而且由于铅条厚度有限，其散射吸收能力也有限。所谓的狭缝技术提供了一种避免这一缺点的可能性，即通过相当厚的铅板中的狭缝提供的窄扇形束对受检者进行连续曝光。本文报告了格栅技术和狭缝技术在患者剂量、散射减少、图像质量以及自动曝光控制效果方面的比较结果。
