Reviews
作者:
期刊:
The British Journal of Radiology
(WILEY Available online 1962)
卷期:
Volume 35,
issue 412
页码: 240-240
年代: 1962
DOI:10.1259/0007-1285-35-412-240-a
出版商: The British Institute of Radiology
数据来源: WILEY
摘要:
This book deals with a process of extracting the maximum information from a particular type of radiography. The principle of the author's method, termed “subtraktion”, is as follows. Supposing two radiographs of the same object are taken under identical conditions, and a positive transparency is made of one. If now one looks, or prints, through the superimposed positive transparency and one of the radiographs, an even background blackening is obtained showing no detail.
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