Method of determining the body contour for the reconstruction of

Details Method of determining the body contour for the reconstruction of Method of determining the body contour for the reconstruction of

1980-01-14

1983-03-01

Church, Craig E.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

364414, 378901, G03B 4116

Patent

active

043756964

ABSTRACT:
The invention relates to a method of determining the contour of a body positioned on an examination table in order to reconstruct an absorption distribution of a radiation in a flat examination zone of the body. During a first step, the contour zone of the body situated opposite the examination table is determined, for example, by means of an optical auxiliary radiation source, so-termed first contour points thus being derived. Starting from these first contour points, so-termed absorption lengths are plotted in the direction of the body on the beam paths extending through the first contour points and the examination zone in order to approximate the contour points of the body facing the examination table. The absorption lengths are the quotients of an absorption value associated with a beam path and a predetermined mean absorption coefficient.

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