Copyright © Philip M. Parker, INSEAD. Terms of Use.
| Year | Description |
| 1999 | Invention patented by Yoshinori Arai and Masakazu Suzuki on March 9th, 1999. Abstract: A CT scanning apparatus in accordance with the present invention comprises an image pickup system having an X-ray source being rotated around an object and a two-dimensional X-ray image pickup portion disposed opposite to the X-ray source with the object therebetween and being rotated, and is configured to rotate the image pickup system so as to radiograph three-dimensional areas inside the object, wherein a substance capable of being detected as an X-ray image is used as a position marker, and the position marker is disposed so as to be positioned in the image pickup view of the image pickup system during the rotation of the image pickup system and radiographed together with the object. In an ideal case, the image of the position marker in the two-dimensional X-ray image obtained as described above moves in a sine curve. Therefore, a correction amount for each X-ray image is calculated from the difference between the actual position in the X-ray image and the ideal position changing in the sine curve. By using the correction amount, the two-dimensional X-ray image is corrected, and a CT image is built. As a result, the effects of "moving artifact" and the like can be eliminated, and a clear image can be obtained. |
| Source: selected by the editor from original sources. | |
Copyright © Philip M. Parker, INSEAD. Terms of Use.
