Claims
- 1. A slit radiography assembly, which comprises:
- an X-ray source;
- an X-ray detector for recording radiation passing through a body being radiographed;
- a slit diaphragm positioned between said X-ray source and said body for forming a substantially planar X-ray beam;
- means for scanning said body with said planar X-ray beam;
- an X-ray adsorption means for influencing said planar X-ray beam during scanning;
- a two dimensional dosimeter for ionizing radiation corresponding to a width of said planar X-ray beam and to a height of total scanning distance, said dosimeter including one system of essentially parallel electrodes extending in a direction of scanning for forming sector-wise signals from detected quantities of X-ray radiation transmitted through said body and counterelectrode;
- a control means for receiving signals from said parallel electrodes and for forming control signals corresponding to sector-wise signals from detected quantities of X-ray radiation; and
- means for transmitting said control signals to said X-ray adsorption means.
- 2. The slit radiography assembly as defined in claim 1 wherein said essentially parallel electrodes comprise striptype electrodes disposed on a support.
- 3. The slit radiography assembly as defined in claim 2 wherein said support is a side wall of the dosimeter.
- 4. A slit radiography assembly as defined in claim 2 wherein said support is disposed between opposite walls of said dosimeter.
- 5. The slit radiography assembly as defined in claim 2 wherein said counterelectrode is a flat two-dimensional electrode.
- 6. The slit radiography assembly as defined in claim 2 wherein said counterelectrode comprises a number of parallel counterelectrodes extending at right angles to the direction of scanning and is connected to a multiplexer device connecting one or more electrodes to an operating voltage in synchronization with the scanning movement.
- 7. The slit radiography assembly as defined in claim 6 wherein said parallel counterelectrodes are formed by taut wires.
- 8. The slit radiography assembly as defined in claim 6 wherein said parallel counterelectrodes are formed by strips disposed on a support.
- 9. The slit radiography assembly as defined in claim 1 wherein said essentially parallel striplike electrodes comprise wires stretched in a frame of said dosimeter.
- 10. The slit radiography assembly as defined in claim 1 wherein said counterelectrode is essentially enclosed by a guard electrode.
- 11. A slit radiography assembly as defined in claim 1 wherein said counter electrode is disposed on a sidewall of said dosimeter.
- 12. The slit radiography assembly as defined in claim 11 wherein said counterelectrode is disposed on a separate support.
- 13. The slit radiography assembly as defined in claim 1 and further including an anti-diffusing grid disposed between said dosimeter and said X-ray detector.
- 14. The slit radiography assembly as defined in claim 1 wherein said dosimeter is placed between the body and said X-ray detector and further including an anti-diffusing grid disposed between said dosimeter and said X-ray detector.
Priority Claims (1)
Number |
Date |
Country |
Kind |
8701122 |
May 1987 |
NLX |
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Parent Case Info
This is a continuation of U.S. application Ser. No. 07/435,424, filed Nov. 1, 1989 now U.S. Pat. No. 5,062,129.
US Referenced Citations (4)
Continuations (1)
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Number |
Date |
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Parent |
435424 |
Nov 1989 |
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