PORTABLE CHEST IMAGING - COMPARISON OF STORAGE PHOSPHOR DIGITAL, ASYMMETRIC SCREEN-FILM, AND CONVENTIONAL SCREEN-FILM SYSTEMS

被引:53
作者
NIKLASON, LT [1 ]
CHAN, HP [1 ]
CASCADE, PN [1 ]
CHANG, CL [1 ]
CHEE, PW [1 ]
MATHEWS, JF [1 ]
机构
[1] UNIV MICHIGAN HOSP,DEPT RADIOL,ANN ARBOR,MI 48109
关键词
RADIOGRAPHY; COMPARATIVE STUDIES; BEDSIDE; DIGITAL; STORAGE PHOSPHOR; SCREENS AND FILMS; THORAX;
D O I
10.1148/radiology.186.2.8421740
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
The quality of chest images obtained with portable radiography was evaluated for a conventional screen-film system, a new asymmetric screen-film chest system, and computed radiography (CR). Sixty chest images were obtained in 20 patients in an intensive care unit. The CR system was ranked by all three evaluating radiologists as substantially better in overall diagnostic quality, interpretability of the lungs, and musculoskeletal detail and by two of the three observers as better for the visibility of catheters and lines. In the upper abdomen and mediastinum, there was not a clear preference. Standard deviations of film density were +/-0.12, +/-0.41, and +/-0.39 for the CR, conventional, and asymmetric systems, respectively. For the same systems, phantom results indicated the relative lung contrast values were 1.2, 1.0, and 0.89, respectively. Similarly, the limiting resolution values in the lung were 2.0, 4.2, and 6.3 line pairs per millimeter. The CR system had twice the root-mean-square noise of the screen-film systems. Overall, the preferred system for portable chest imaging was the CR system.
引用
收藏
页码:387 / 393
页数:7
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