Maximizing film contrast for scanning equalization radiography
作者:
D. B. Plewes,
J. McFaul,
M. Ivanovic,
期刊:
Medical Physics
(WILEY Available online 1998)
卷期:
Volume 17,
issue 3
页码: 357-361
ISSN:0094-2405
年代: 1998
DOI:10.1118/1.596515
出版商: American Association of Physicists in Medicine
数据来源: WILEY
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.
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