| 摘要 |
<p>PHD 76155 26.9.1977 When absorption values in the individual image points of a planar slice to be examined are reconstructed from measuring values, which have been determined with the aid of a transversal tomography scanner, artefacts may be produced when the body being measuring moves relative to the coordinate reference point of the scanner during the measurement. In order to avoid such artefacts, the measuring values thus determined are shifted relative to their coordinates in such a way as though they were obtained from a non-moving body. For this purpose the weighted-mean point is determined for each series of measuring values determined for each specific orientation of the measuring beams, and for all weighted mean lines which pass through said weighted-mean point perpendicularly to the measuring coordinates the distance to a point of the image plane is subsequently determined. Next, the measuring values are shifted or processed in a shifted manner in conformity with said distance.</p> |
