CR与DR在下肢全长摄影中的应用比较

A Comparison between CR and DR on the Radiography of Whole Lower Limbs

目的:探讨数字化摄影中,下肢全长CR1次成像和DR多次成像方法的实际应用。方法:40例被检者下肢全长CR1次曝光成像,在CR系统内合成下肢全长;40例DR系统进行多次曝光成像,在DR图像处理系统中合成下肢全长,对投照方法和图像的合成进行比较。结果:1次曝光CR组40例,多次曝光DR组32例,所合成双下肢全长图像清晰,能满足临床应力线的测量,下肢全长1次曝光CR成像操作简便,图像视觉连贯性和密度均匀性优于多次曝光DR成像。结论:下肢全长CR1次曝光更具有推广价值。

Objective：To investigate the application of computed radiography （CR） with just-for-once exposure and direct radiography （DR） with multiple exposures in Xray projection of whole lower limbs. Methods： Forty subjects underwent CR by the method of just-for-once exposure,and another forty subjects were chosen with DR by way of multiple exposures, and synthetical images of whole lower limbs were obtained in their respective image processing system. The method of projections and synthesis of images were compared. Results： All the forty cases by CR with just-for-once exposure and thirty-two cases by DR with synthesis images were successful, the images were clear and applicable for measurement of stress line in clinical practice. The visual consistence and even density of images with once exposure were better than with multiple exposures. Conclusion： The images by CR with once exposure have higher quality and are easy to operate, so they can better satisfy the requirement in actual clinic.