Method of and device for determining the contour of a body by me

Details Method of and device for determining the contour of a body by me Method of and device for determining the contour of a body by me

1980-06-30

1983-05-17

Smith, Alfred E.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

364414, A61B 600

Patent

active

043842097

ABSTRACT:
When only a part of a body slice to be examined, for example, a separate organ, is irradiated by means of a fan-shaped radiation beam during computer tomography, it is necessary to know the body contour in order to enable reconstruction. The body contour can be determined by means of radiation scattered in the body. The scattered radiation is measured, in a direction which deviates from the direction of the X-rays of the fan-shaped beam, along scattered radiation paths which do not intersect each other in the positioning zone. On the basis of the detected scattered radiation, the scattered radiation path which is situated most far from the center of the examination zone is selected, after which the position of the scattered radiation path within the fan-shaped radiation beam, and hence within the positioning zone, is recorded. After the recording of all scattered radiation paths for the different directions of the fan-shaped radiation beam, the contour of the body slice to be examined is determined from the recorded positions of the scattered radiation paths.

REFERENCES:
patent: 3106640 (1963-10-01), Oldendorf
patent: 3927318 (1975-12-01), Macovski
patent: 4124804 (1978-11-01), Mirell
patent: 4228505 (1980-10-01), Wagner
patent: 4277686 (1981-07-01), Harding

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