Nakano Y, Hiraoka T, Togashi K, Nishimura K, Itoh K, Fujisawa I, Sagoh T, Minami S, Itoh H, Torizuka K
AJR Am J Roentgenol. 1987 Mar;148(3):569-73. doi: 10.2214/ajr.148.3.569.
Computed radiography was combined with a 0.1-mm microfocus radiographic tube to obtain radiographic magnification of a x3 to x5. Gray-scale image processing compensated for the loss of radiographic contrast associated with the high-kilovoltage, short-exposure technique. The high-pass spatial frequency filtering capability of the computed radiography resulted in enhanced edges and increased displayed latitude. The improved image quality obtained by magnification computed radiography allowed delineation of subtle abnormalities and small anatomic structures not apparent on conventional screen-film contact or magnification radiographs.
计算机X线摄影与0.1毫米微焦点X线摄影管相结合，以获得3倍至5倍的X线放大率。灰度图像处理补偿了与高千伏、短曝光技术相关的X线对比度损失。计算机X线摄影的高通空间频率滤波能力增强了边缘并增加了显示的宽容度。通过放大计算机X线摄影获得的改进图像质量能够清晰显示传统屏-片接触式或放大X线片上不明显的细微异常和小解剖结构。
