DE3439355A1 - Diaphragm for X-ray diagnosis equipment - Google Patents
Diaphragm for X-ray diagnosis equipmentInfo
- Publication number
- DE3439355A1 DE3439355A1 DE19843439355 DE3439355A DE3439355A1 DE 3439355 A1 DE3439355 A1 DE 3439355A1 DE 19843439355 DE19843439355 DE 19843439355 DE 3439355 A DE3439355 A DE 3439355A DE 3439355 A1 DE3439355 A1 DE 3439355A1
- Authority
- DE
- Germany
- Prior art keywords
- diaphragm
- radiation
- absorbing material
- ray
- focus
- 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.)
- Granted
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/06—Diaphragms
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/005—Diaphragms
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Medical Informatics (AREA)
- Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- Radiology & Medical Imaging (AREA)
- Molecular Biology (AREA)
- High Energy & Nuclear Physics (AREA)
- Pathology (AREA)
- Biophysics (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- General Physics & Mathematics (AREA)
- Apparatus For Radiation Diagnosis (AREA)
Abstract
Description
Blende für RöntgendiagnostikgeräteCover for X-ray diagnostic devices
Die Erfindung betrifft eine Blende für Röntgendiagno stikgeräte mit mindestens einem Paar paralleler Blendenplatten aus strahlenabsorbierendem Material, die gegenläufig aufeinander zu und voneinander weg verstellbar sind.The invention relates to a diaphragm for x-ray diagnostics with stikgeräte at least one pair of parallel diaphragm plates made of radiation-absorbing material, which are adjustable in opposite directions towards and away from one another.
Eine Blende dieser Art dient als Primärstrahlenblende zur rechteckförmigen Einblendung des Röntgenstrahlenbündels. In der Regel sind dabei zwei senkrecht zueinander verstellbare Blendenplattenpaare vorgesehen. Es ist bekannt, die Blendenplatten über ein Getriebe oder Hebelgestänge von Hand oder durch einen Elektromotor zu verstellen.A diaphragm of this type serves as the primary beam diaphragm for the rectangular one Fade in of the X-ray beam. Usually two are perpendicular to each other adjustable aperture plate pairs provided. It is known the aperture plates Can be adjusted by hand or by an electric motor via a gear or lever linkage.
Bei einer Blende dieser Art tritt außer der vom Fokus des Röntgenstrahlers ausgehenden Primärstrahlung auch Sekundärstrahlung auf, die insbesondere in der Blende selbst entsteht und demgemäß über das jeweils eingeblendete Feld hinausstrahlen kann (Streustrahlung).With a diaphragm of this type, there is also the focus of the X-ray tube outgoing primary radiation also secondary radiation, which in particular in the The aperture itself is created and accordingly radiates beyond the field that is faded in can (scattered radiation).
Der Erfindung liegt die Aufgabe zugrunde, eine Blende der eingangs genannten Art so auszubilden, daß der Austritt von Streustrahlung aus der Blende über das eingeblendete Feld hinaus weitgehend eliminiert ist.The invention is based on the object of a panel of the initially called type so that the emergence of scattered radiation from the diaphragm is largely eliminated beyond the displayed field.
Diese Aufgabe ist erfindungsgemäß dadurch gelöst, daß in Strahlenrichtung nach jeder Blendenplatte je eine Lamelle aus strahlenabsorblerendem Material schwenkbar gelagert ist, die durch Führungsmittel derart geführt ist, daß sie sich mit dem Ende der zugeordneten Blendenplatte bewegt und in jeder Blendenstellung auf den Fokus des Röntgenstrahlers ausgerichtet ist. Bei der erfindungsgemäßen Blende folgt in Strahlenrichtung auf die das Strahlungsfeld einblenden den Blendenplatten je eine weitere Blendenlamelle, die von der Röntgenstrahlung tangiert wird, also die Abmessungen des eingeblendeten Feldes nicht beeinflußt, da sie immer auf den Fokus des Röntgenstrahlers ausgerichtet ist. Sie absorbiert jedoch extrafokale Streustrahlung.According to the invention, this object is achieved in that in the direction of the beam one slat made of radiation-absorbing material can be pivoted after each diaphragm plate is stored, which is guided by guide means is, that you moves with the end of the associated diaphragm plate and in each diaphragm position is aligned with the focus of the X-ray tube. In the case of the aperture according to the invention follows the aperture plates in the direction of the radiation on which the radiation field is fade in one more diaphragm each, which is affected by the X-ray radiation, that is does not affect the dimensions of the displayed field, as it is always based on the Focus of the X-ray tube is aligned. However, it absorbs extrafocal scattered radiation.
Die Erfindung ist nachfolgend anhand eines in der Zeichnung dargestellten Ausführungsbeispieles näher erläutert.The invention is illustrated below with reference to one in the drawing Embodiment explained in more detail.
In der Zeichnung ist der Fokus 1 eines Röntgenstrahlers dargestellt, von dem ein Röntgenstrahlenbündel 2 ausgeht, das durch eine Primärstrahlenblende 3 in dem Gehäuse 4 rechteckförmig bzw. quadratisch eingeblendet wird. Für die Einblendung in einer Richtung weist die Primärstrahlenblende 3 zwei Blendenplatten 5, 6 aus strahlenabsorbierendem Material auf, die mit ihren in der voll ausgezogen gezeichneten Stellung oberen Enden gelenkig mit zwei auf einer gemeinsamen gerätfesten Achse 7 schwenkbar gelagerten Stangen 8, 9 verbunden sind. An ihren unteren Enden sind die Blendenplatten 5, 6 an zwei Schwenkhebeln 10, 11 angelenkt, die um zwei gerätefest Achsen 12, 13 schwenkbar sind. Die Schwenkachsen für die Blendenplatten 5, 6 auf den Schwenkhebeln 10, 11 sind mit 14, 15 bezeichnet.In the drawing, the focus 1 of an X-ray tube is shown, from which an X-ray beam 2 emanates, which passes through a primary beam diaphragm 3 is displayed in the housing 4 rectangular or square. For the display The primary beam diaphragm 3 has two diaphragm plates 5, 6 in one direction radiation-absorbing material, which with their drawn in the full line Position of the upper ends articulated with two on a common axis that is fixed to the device 7 pivotably mounted rods 8, 9 are connected. At their lower ends are the diaphragm plates 5, 6 are hinged to two pivot levers 10, 11, which are fixed by two Axes 12, 13 are pivotable. The pivot axes for the diaphragm plates 5, 6 the pivot levers 10, 11 are denoted by 14, 15.
Die Blendenplatten 5, 6 sind durch Verschwenkung des Schwenkhebels 10 entgegen und des Schwenkhebels 11 im Uhrzeigersinn zum Schließen der Blende verstellbar. In der geschlossenen Stellung nehmen sie die gestrichelt gezeichnete Lage ein.The diaphragm plates 5, 6 are pivoted by pivoting the pivot lever 10 counterclockwise and the pivot lever 11 can be adjusted clockwise to close the diaphragm. In the closed position take the one shown in dashed lines Location a.
Auf den Achsen 14, 15 sind zwei Führungen 16, 17 schwenkbar gelagert, die zwei Schlitze 18, 19 aufweisen, mit denen sie auf einem gerätfesten Bolzen 20 geführt sind. An ihren Enden tragen sie zwei Lamellen 21, 22.Two guides 16, 17 are pivotably mounted on the axles 14, 15, which have two slots 18, 19, with which they can be mounted on a bolt 20 that is fixed to the device are led. At their ends they have two slats 21, 22.
Die Schlitze 18, 19 sind so geformt, daß die Lamellen 21, 22 beim Schließen der Blende immer auf den Fokus 1 des Röntgenstrahlers ausgerichtet bleiben. Sie schliessen sich dabei in jeder Blendenstellung unmittelbar an die das Röntgenstrahlenbündel 2 begrenzenden Enden der Blendenplatten 5, 6 an. In der Zeichnung ist die Stellung der Lamellen 21, 22 bei vollkommen geschlossener Blende gestrichelt dargestellt. Auch dabei sind sie auf den Fokus 1 ausgerichtet.The slots 18, 19 are shaped so that the slats 21, 22 when When closing the diaphragm, always stay aligned with focus 1 of the X-ray tube. In each diaphragm position, they close directly to the X-ray beam 2 delimiting ends of the diaphragm plates 5, 6. In the drawing is the position of the lamellae 21, 22 shown in dashed lines when the aperture is completely closed. Here, too, they are aligned with focus 1.
Die Lamellen 21, 22 behindern die Primärstrahlung nicht, d.h. sie haben keine Auswirkung auf die durch die Blendenplatten 5, 6 definierten Abmessungen des Röntgenstrahlenbündels 2, weil sie in jeder Blendenstellung auf den Fokus 1 ausgerichtet sind. Sie absorbieren jedoch zum großen Teil extrafokale Streustrahlung, die insbesondere im Gehäuse 4 der Blende 3 entsteht.The lamellas 21, 22 do not hinder the primary radiation, i.e. they have no effect on the dimensions defined by the diaphragm plates 5, 6 of the X-ray beam 2, because in every diaphragm position they are on the focus 1 are aligned. However, they largely absorb extra-focal scattered radiation, which arises in particular in the housing 4 of the diaphragm 3.
1 Patentanspruch 1 Figur1 claim 1 figure
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19843439355 DE3439355A1 (en) | 1984-10-26 | 1984-10-26 | Diaphragm for X-ray diagnosis equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19843439355 DE3439355A1 (en) | 1984-10-26 | 1984-10-26 | Diaphragm for X-ray diagnosis equipment |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3439355A1 true DE3439355A1 (en) | 1986-04-30 |
DE3439355C2 DE3439355C2 (en) | 1993-04-15 |
Family
ID=6248883
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19843439355 Granted DE3439355A1 (en) | 1984-10-26 | 1984-10-26 | Diaphragm for X-ray diagnosis equipment |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3439355A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6934363B2 (en) | 2001-12-18 | 2005-08-23 | Siemens Aktiengesellschaft | Radiation diaphragm for an X-ray apparatus |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT231019B (en) * | 1960-08-04 | 1964-01-10 | Medicor Roentgen Muevek | X-ray masking device |
CH437627A (en) * | 1964-09-10 | 1967-06-15 | R Dr Johner Werner | Radiation shield for penetrating rays |
-
1984
- 1984-10-26 DE DE19843439355 patent/DE3439355A1/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT231019B (en) * | 1960-08-04 | 1964-01-10 | Medicor Roentgen Muevek | X-ray masking device |
CH437627A (en) * | 1964-09-10 | 1967-06-15 | R Dr Johner Werner | Radiation shield for penetrating rays |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6934363B2 (en) | 2001-12-18 | 2005-08-23 | Siemens Aktiengesellschaft | Radiation diaphragm for an X-ray apparatus |
Also Published As
Publication number | Publication date |
---|---|
DE3439355C2 (en) | 1993-04-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8110 | Request for examination paragraph 44 | ||
8120 | Willingness to grant licences paragraph 23 | ||
D2 | Grant after examination | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |