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Science 26 December 1958:
Vol. 128. no. 3339, pp. 1622 - 1623
DOI: 10.1126/science.128.3339.1622
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Articles

X-ray Visualization and Analysis of Multicomponent Subjects

R. STUART MACKAY 1

1 Radiological Research Laboratory, University of California Medical Center, San Francisco

The information carried by x-rays showing the distribution of each material of which a subject is assumed to be composed is distributed on separate films by means of a controlled variation in composition of the scanning radiation. The beam is modulated, for example, by simultaneous motion of several wedges. The method is useful in quantitative x-ray analysis and as a system for making radiographs predominantly sensitive to one material in the subject.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)