Claims
- 1. A method for scanning a body as part of a process for reconstructing a cross-section thereof using a source of penetrating radiation that produces a plurality of coplanar beams defining a fan beam passing through the body coplanar with the cross-section, the method comprising:
- (a) positioning the fan beam relative to a spatially fixed center at a first position;
- (b) rotating the fan beam about the fixed center and measuring the intensity of each beam after it passes through the cross-section;
- (c) repositioning the fan beam relative to the fixed center to a second position; and
- (d) repeating step (b).
- 2. The method of claim 1 wherein the rotations are through substantially 360.degree. and each rotation causes the fan beam to sweep out an area of the cross-section defined by reference circles concentric with the fixed center and tangent to the extremities of the fan beam.
- 3. The method of claim 2 wherein the positions of the fan beam are selected such that the swept out areas are contiguous.
RELATED APPLICATIONS
This is a division of application Ser. No. 850,892, filed Nov. 15, 1977, now U.S. Pat. No. 4,433,380 which was a continuation-in-part of U.S. patent application Ser. No. 635,165 filed Nov. 25, 1975 and now abandoned.
US Referenced Citations (7)
Divisions (1)
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Date |
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Parent |
850892 |
Nov 1977 |
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Continuation in Parts (1)
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635165 |
Nov 1975 |
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