MAXIMIZING FILM CONTRAST FOR SCANNING EQUALIZATION RADIOGRAPHY

被引:3
作者
PLEWES, DB
MCFAUL, J
IVANOVIC, M
机构
[1] GE,MED SYST GRP,MILWAUKEE,WI 53201
[2] BROOKHAVEN NATL LAB,DEPT MED,UPTON,NY 11973
关键词
contrast; equalization; radiography; x ray;
D O I
10.1118/1.596515
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 results of a numerical simulation indicate that scanning equalization radiography (SER) provides the opportunity to use film/screen combinations of significantly higher contrast than currently practical in conventional chest radiography. These calculations which attempt to maximize overall image contrast while minimizing areas of over and under exposure demonstrate that optimum film gradient varies inversely with scanning beam area. Furthermore, we show that in an SER system which we have optimized for chest imaging that the peak film gamma gradient can be increased from that typical of conventional films (3.0-3.5) to approximately 7 with advantage. © 1990, American Association of Physicists in Medicine. All rights reserved.
引用
收藏
页码:357 / 361
页数:5
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