| 摘要 |
PCT No. PCT/AT87/00004 Sec. 371 Date Jul. 27, 1988 Sec. 102(e) Date Jul. 27, 1988 PCT Filed Sep. 29, 1987 PCT Pub. No. WO87/04830 PCT Pub. Date Aug. 13, 1987.An apparatus for obtaining tomographic X-ray images having enhances contrast properties comprising an X-ray radiation receiver (3). The radiation is received by a recording circuit (50) having an analog-digital converter (4) and two memories (8, 9) for storage of the image signals. The image signals are recorded during two movement cycles of the X-ray source (1), preferably perpendicular to each other. An analyzing circuit (51) is connected to the two memories. A contrast comparison is repeated over a plurality of original images made between image elements adjacent each other. The result of this comparison is used for improvement of the original images with respect to the contrast in a transformation circuit (52), the improved images being visible on a monitor (43).
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