Variable compensation technique for digital radiography of the chest.
Variable compensation technique for digital radiography of the chest.
复制标题
胸部数字放射线摄影的可变补偿技术。
DOI：
10.1148/radiology.173.2.2798877
复制
发表时间：
1989
期刊：
影响因子：
19.7
通讯作者：
Powell,AO
中科院分区：
文献类型：
--
作者：
Dobbins3rd,JT;Powell,AO
The authors describe a new technique, variable compensation (VC) radiography, for digital radiography of the chest. It permits retrospective adjustment of image display while maintaining improved mediastinal signal-to-noise ratio (S/N) from aggressive x-ray equalization. A fraction of a logarithmic image representing the profile of the beam intensity incident on the patient is subtracted from a logarithmic equalized image. VC images of a chest phantom were generated with various weightings of the beam-profile image. Edge artifacts were substantially reduced with a weighting of greater than 0.5 and eliminated with a weighting of 1.0. The S/N properties of VC images were measured with a series of plastic squares placed over various regions of the chest phantom. The S/N of the squares in the dense sub-diaphragm were improved twofold compared with the S/N on unequalized radiographs, whereas the S/N in the lung was reduced by 30%. Studies of a volunteer revealed the ability to render images with aggressive equalization (for improved mediastinal visualization) and images with the appearance of traditional chest radiographs.
