DE4207007C1 - Computer tomography appts. with continuous rotating measuring unit - feeds x=ray energy over current feed to x=ray detector via insulated annular rotating disc - Google Patents
Computer tomography appts. with continuous rotating measuring unit - feeds x=ray energy over current feed to x=ray detector via insulated annular rotating discInfo
- Publication number
- DE4207007C1 DE4207007C1 DE19924207007 DE4207007A DE4207007C1 DE 4207007 C1 DE4207007 C1 DE 4207007C1 DE 19924207007 DE19924207007 DE 19924207007 DE 4207007 A DE4207007 A DE 4207007A DE 4207007 C1 DE4207007 C1 DE 4207007C1
- Authority
- DE
- Germany
- Prior art keywords
- measuring unit
- appts
- rotating
- rotating disc
- computer tomography
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000002591 computed tomography Methods 0.000 title abstract description 4
- 239000004020 conductor Substances 0.000 claims abstract description 12
- 230000008878 coupling Effects 0.000 claims abstract description 7
- 238000010168 coupling process Methods 0.000 claims abstract description 7
- 238000005859 coupling reaction Methods 0.000 claims abstract description 7
- 230000005855 radiation Effects 0.000 claims abstract description 4
- 239000011810 insulating material Substances 0.000 claims abstract description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- 238000011156 evaluation Methods 0.000 abstract 1
- 238000012216 screening Methods 0.000 abstract 1
- 238000007781 pre-processing Methods 0.000 description 3
- 238000011835 investigation Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/56—Details of data transmission or power supply, e.g. use of slip rings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/29—Measurement performed on radiation beams, e.g. position or section of the beam; Measurement of spatial distribution of radiation
- G01T1/2914—Measurement of spatial distribution of radiation
- G01T1/2985—In depth localisation, e.g. using positron emitters; Tomographic imaging (longitudinal and transverse section imaging; apparatus for radiation diagnosis sequentially in different planes, steroscopic radiation diagnosis)
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/64—Devices for uninterrupted current collection
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R2201/00—Connectors or connections adapted for particular applications
- H01R2201/12—Connectors or connections adapted for particular applications for medicine and surgery
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Biomedical Technology (AREA)
- Animal Behavior & Ethology (AREA)
- Optics & Photonics (AREA)
- Pathology (AREA)
- Radiology & Medical Imaging (AREA)
- Biophysics (AREA)
- Heart & Thoracic Surgery (AREA)
- Computer Networks & Wireless Communication (AREA)
- Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
- Measurement Of Radiation (AREA)
Abstract
Description
Die Erfindung betrifft einen Computertomographen mit kon tinuierlich rotierender Meßeinheit aus Röntgenstrahler und Strahlendetektor. Bei einem solchen Computertomographen wird die Energie zum Röntgenstrahler über eine rotierende Stromkupplung zugeführt. Die Detektorsignale werden nach Vorverarbeitung ebenfalls über eine rotierende Stromkupp lung abgeführt. Dadurch ist eine Dauerrotation der Meßein heit und damit eine sehr schnelle Abtastung einer zu untersuchenden Schicht oder eines zu untersuchenden Volumens möglich.The invention relates to a computer tomograph with con continuously rotating measuring unit consisting of X-ray emitter and Radiation detector. With such a computer tomograph the energy to the x-ray emitter is rotating Power coupling supplied. The detector signals are after Pre-processing also via a rotating electrical coupling dissipated. This is a permanent rotation of the measurement unit and thus a very fast scanning of one investigating layer or one to be examined Volume possible.
Es ist bekannt, die rotierende Stromkupplung für die Ab nahme der vorverarbeiteten Detektorsignale als optische Stromkupplung aufzubauen (Electromedica, Band 56, Heft 2, 1988, Seiten 50-56). Ferner ist es bekannt, diese Strom kupplung auf der Basis eines Wellenleiters auszubilden. Beiden Techniken ist gemeinsam, daß der Aufwand für die Erfassung der vorverarbeiteten Detektorsignale relativ groß ist. Schließlich ist es auch bekannt, bei einem Com putertomographen Signale zwischen dem feststehenden und dem rotierenden Teil mit Hilfe von Schleifringenanord nungen zu übertragen (DE 39 41 774 A1, DE 30 34 717 C2). Über den genauen Aufbau der Schleifringanordnungen ist diesen Dokumenten jedoch nichts entnehmbar.It is known the rotating power coupling for the Ab taking the preprocessed detector signals as optical To establish a power coupling (Electromedica, volume 56, number 2, 1988, pages 50-56). It is also known this current to form a coupling on the basis of a waveguide. Both techniques have in common that the effort for the Detection of the preprocessed detector signals relative is great. After all, it is also known to be at a Com putertomographen signals between the fixed and the rotating part with the help of slip ring arrangement to transmit (DE 39 41 774 A1, DE 30 34 717 C2). About the exact structure of the slip ring arrangements is however, nothing can be seen from these documents.
Der Erfindung liegt die Aufgabe zugrunde, einen Computer tomographen der eingangs genannten Art so auszubilden, daß mit einem gegenüber dem Stand der Technik erheblich ver ringerten Aufwand eine kontinuierliche Erfassung der vor verarbeiteten Detektorsignale erfolgt. The invention has for its object a computer To train tomographs of the type mentioned in such a way that with a ver compared to the prior art reduced effort a continuous recording of the processed detector signals.
Diese Aufgabe ist erfindungsgemäß dadurch gelöst durch die Merkmale des Patentanspruches 1. Bei dem erfindungsgemäßen Computertomographen ist die kreisförmige Scheibe nach Art einer gedruckten Leiterplatte ausgebildet, mit der die z. B. als Kohlebürsten ausgebildeten Signalabnehmer in Kontakt stehen. Der Aufwand ist gegenüber der optischen Übertra gung oder der Übertragung mit Hilfe eines Wellenleiters wesentlich verringert.This object is achieved by the invention Features of claim 1. In the invention Computer tomography is the circular disc according to Art a printed circuit board with which the z. B. as Carbon brushes trained signal contact in contact stand. The effort is compared to the optical transmission or transmission using a waveguide significantly reduced.
Die rotierende Scheibe kann auf ihrer zweiten, parallel zur Ebene der untersuchten Schicht liegenden Fläche mit einer leitfähigen Abschirmschicht überzogen sein. Zur Ver hinderung von Reflexionen können an den Leiterbahnen je weils gegenüber den Einspeisestellen für die die vorver arbeiteten Detektorsignale rotierende Anpassungswider stände angeschlossen sein.The rotating disc can on its second, parallel to the plane of the layer under investigation be covered with a conductive shielding layer. Ver Reflections can be prevented on the conductor tracks because compared to the entry points for the pre-ver detector signals worked rotating adjustment resistance stands are connected.
Die Erfindung ist nachfolgend anhand eines in der Zeich nung dargestellten Ausführungsbeispieles näher erläutert.The invention is based on a in the drawing tion illustrated embodiment explained in more detail.
Es zeigen:Show it:
Fig. 1 einen Computertomographen nach der Erfindung, und Fig. 1 shows a computed tomography apparatus according to the invention, and
Fig. 2 und 3 Darstellungen zur Erläuterung der Signal abnahme bei dem Computertomographen gemäß Fig. 1. Fig. 2 and 3 are diagrams for explaining the signal sampling according to the computer tomograph to FIG. 1.
In der Fig. 1 ist eine kreisringförmige Platte 1 darge stellt, welche motorisch um die Systemachse 2 gedreht wird. Die Platte 1 dient als Tragplatte für eine Meßein heit aus einem Röntgenstrahler 3 und einem Strahlendetek tor 4, welcher aus einer Reihe von Detektorelementen, z. B. aus 768 Detektorelementen, besteht, welche sich senkrecht zur Zeichenebene erstreckt. Dem Strahlendetektor 4 ist eine Elektronik 5 zur Signalvorverarbeitung nachge schaltet. Die vorverarbeiteten Detektorsignale werden kreisringförmigen Leiterbahnen 6, 7, 8, 9, 10 auf einer kreisringförmigen Scheibe 11 aus Isolierstoff zugeführt, welche unter Zwi schenschaltung einer Isolierschicht 12 an der Platte 1 befestigt ist, d. h. mit der Platte 1 und der Meßeinheit 3, 4 um die Systemachse 2 rotiert. Die Leiterbahnen 6 bis 10 sind auf einer der beiden, parallel zur untersuchten Schicht 13 verlaufenden Flächen der Scheibe 11 als konzentrische Kreise aufgebracht. Auf der zweiten, parallel zur unter suchten Schicht 13 verlaufenden Fläche der Scheibe 11 ist eine Abschirmschicht 14 aus leitfähigem Material aufge bracht.In Fig. 1, an annular plate 1 is Darge, which is rotated by motor around the system axis 2 . The plate 1 serves as a support plate for a measuring unit from an X-ray emitter 3 and a Strahlendetek gate 4 , which consists of a number of detector elements, for. B. consists of 768 detector elements, which extends perpendicular to the plane of the drawing. The radiation detector 4 is an electronics 5 for signal preprocessing switched. The preprocessed detector signals are supplied to annular conductor tracks 6 , 7 , 8 , 9 , 10 on an annular disk 11 made of insulating material, which is attached to the plate 1 with the interposition of an insulating layer 12 , ie with the plate 1 and the measuring unit 3 , 4 the system axis 2 rotates. The conductor tracks 6 to 10 are applied as concentric circles on one of the two surfaces of the pane 11 which run parallel to the layer 13 being examined. On the second, parallel to the examined layer 13 running surface of the disk 11 , a shielding layer 14 made of conductive material is brought up.
Zur Durchstrahlung der Schicht 13 unter verschiedenen Rich tungen wird die Scheibe 1 und damit die Meßeinheit 3, 4 um die Systemachse 2 gedreht. Die dabei erzeugten Detektor signale werden nach Vorverarbeitung in der Elektronik 5 mit Hilfe von ortsfesten Signalabnehmern 15 bis 19, die als Kohlebürsten ausgebildet sind und auf den Leiterbahnen 6 bis 10 schleifen, abgenommen und einem Rechner 20 zugeführt, der daraus ein Bild der untersuchten Schicht 13 berechnet und auf einem Sichtgerät 21 wiedergibt. Wird das Untersuchungs objekt, das auf einer parallel zur Systemachse 2 in der Systemöffnung 22 angeordneten Liege liegt, während der kon tinuierlichen Drehung der Meßeinheit 3, 4 in Richtung der Systemachse 2 verschoben, so wird ein Volumen des Unter suchungsobjektes abgetastet und kann ebenfalls auf dem Sichtgerät 21 dargestellt werden.To irradiate the layer 13 under different directions, the disk 1 and thus the measuring unit 3 , 4 is rotated about the system axis 2 . The detector signals generated in this way are removed after preprocessing in the electronics 5 with the aid of stationary signal pickups 15 to 19 , which are designed as carbon brushes and grind on the conductor tracks 6 to 10 , and fed to a computer 20 , which generates an image of the layer 13 under investigation calculated and reproduced on a display device 21 . If the examination object, which lies on a couch arranged parallel to the system axis 2 in the system opening 22 , is shifted during the continuous rotation of the measuring unit 3 , 4 in the direction of the system axis 2 , then a volume of the examination object is scanned and can also be scanned on the Display device 21 are shown.
Die Fig. 2 zeigt schematisch zwei Leiterbahnen 6, 7 auf der Scheibe 11. Die auf der Scheibe 11 ortsfesten Einspeise stellen 23, 24 für die vorverarbeiteten Detektorsignale liegen den Anschlußstellen zweier Anpassungswiderstände 25, 26 gegenüber, die mit der Scheibe 11 rotieren. Dadurch sind Signalreflexionen verhindert. In der Fig. 2 sind noch schematisch zwei Kohlebürsten 15, 16 und ein nachgeschal teter Verstärker 27 dargestellt. The Fig. 2 schematically shows two conductor tracks 6, 7 on the disk 11. The stationary on the disk 11 feed 23 , 24 for the preprocessed detector signals are opposite the connection points of two matching resistors 25 , 26 which rotate with the disk 11 . This prevents signal reflections. In Fig. 2, two carbon brushes 15 , 16 and a downstream amplifier 27 are shown schematically.
Die Fig. 3 zeigt einen Ausschnitt aus der Scheibe 11 in linearer Darstellung. Die Leiterbahnen 7, 9 übertragen die Signale Q und , während die Leiterbahnen 6, 8, 10 als Signalrückleiter wirken und mit der Abschirmschicht 14 verbunden sind. FIG. 3 shows a detail of the disk 11 in a linear representation. The conductor tracks 7 , 9 transmit the signals Q and, while the conductor tracks 6 , 8 , 10 act as signal return conductors and are connected to the shielding layer 14 .
Claims (3)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19924207007 DE4207007C1 (en) | 1992-03-05 | 1992-03-05 | Computer tomography appts. with continuous rotating measuring unit - feeds x=ray energy over current feed to x=ray detector via insulated annular rotating disc |
JP1993009067U JP2606941Y2 (en) | 1992-03-05 | 1993-03-05 | Computer tomograph |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19924207007 DE4207007C1 (en) | 1992-03-05 | 1992-03-05 | Computer tomography appts. with continuous rotating measuring unit - feeds x=ray energy over current feed to x=ray detector via insulated annular rotating disc |
Publications (1)
Publication Number | Publication Date |
---|---|
DE4207007C1 true DE4207007C1 (en) | 1993-05-13 |
Family
ID=6453318
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19924207007 Expired - Fee Related DE4207007C1 (en) | 1992-03-05 | 1992-03-05 | Computer tomography appts. with continuous rotating measuring unit - feeds x=ray energy over current feed to x=ray detector via insulated annular rotating disc |
Country Status (2)
Country | Link |
---|---|
JP (1) | JP2606941Y2 (en) |
DE (1) | DE4207007C1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10037294A1 (en) * | 2000-06-29 | 2002-01-17 | Siemens Ag | X-ray machine, especially for medical use, has contact free data and power connections so that cumbersome and weighty cable unit is not required |
DE19533820B4 (en) * | 1994-09-16 | 2012-08-09 | General Electric Co. | Differential operated transmission line for high data rate communication in a computerized tomography system |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3034717C2 (en) * | 1979-09-17 | 1989-12-14 | Picker Corp., Cleveland, Ohio, Us | |
DE3941774A1 (en) * | 1989-01-03 | 1990-07-05 | Siemens Ag | Computer tomograph - has measuring opening with surrounding anode ring in vacuum container, and has detector array |
-
1992
- 1992-03-05 DE DE19924207007 patent/DE4207007C1/en not_active Expired - Fee Related
-
1993
- 1993-03-05 JP JP1993009067U patent/JP2606941Y2/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3034717C2 (en) * | 1979-09-17 | 1989-12-14 | Picker Corp., Cleveland, Ohio, Us | |
DE3941774A1 (en) * | 1989-01-03 | 1990-07-05 | Siemens Ag | Computer tomograph - has measuring opening with surrounding anode ring in vacuum container, and has detector array |
Non-Patent Citations (1)
Title |
---|
electromedica, Bd. 56, H. 2, 1988, S. 50-56 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19533820B4 (en) * | 1994-09-16 | 2012-08-09 | General Electric Co. | Differential operated transmission line for high data rate communication in a computerized tomography system |
DE10037294A1 (en) * | 2000-06-29 | 2002-01-17 | Siemens Ag | X-ray machine, especially for medical use, has contact free data and power connections so that cumbersome and weighty cable unit is not required |
Also Published As
Publication number | Publication date |
---|---|
JP2606941Y2 (en) | 2001-02-19 |
JPH0592772U (en) | 1993-12-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8100 | Publication of the examined application without publication of unexamined application | ||
D1 | Grant (no unexamined application published) patent law 81 | ||
8364 | No opposition during term of opposition | ||
8320 | Willingness to grant licenses declared (paragraph 23) | ||
8339 | Ceased/non-payment of the annual fee |