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线性断层摄影术中的自动剂量率控制(作者译)

[Automatic dose-rate control during linear tomography (author's transl)].

作者信息

Meiler J, Aichinger H

出版信息

Rontgenblatter. 1977 Dec;30(12):626-35.

PMID:594588
Abstract

Investigations on test grids, phantom-kidneys filled with contrast medium and a phantom skull in the case of linear tomography with various angles and constant, triangular or V shaped dose-rate function during tomograms showed that constant exposure over a certain angle of cut leads to minimum thickness. The V shaped distribution remains unregarded since it produces doublepictures. Radiographs exposed mainly in the middle projection give less contrast than those with constant dose rate and smaller planigraphic angles. Concentrating exposure on outer components leads to double pictures.

摘要

在使用不同角度以及在断层扫描期间具有恒定、三角形或V形剂量率函数的线性断层摄影中,对测试网格、充满造影剂的模拟肾脏和模拟颅骨进行的研究表明,在一定的切割角度上进行恒定曝光会导致最小厚度。V形分布被忽略,因为它会产生重影。主要在中间投影处曝光的射线照片比具有恒定剂量率和较小体层摄影角度的照片对比度更低。将曝光集中在外围部分会导致重影。

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