DE4446865C2 - X-ray mammography machine - Google Patents
X-ray mammography machineInfo
- Publication number
- DE4446865C2 DE4446865C2 DE19944446865 DE4446865A DE4446865C2 DE 4446865 C2 DE4446865 C2 DE 4446865C2 DE 19944446865 DE19944446865 DE 19944446865 DE 4446865 A DE4446865 A DE 4446865A DE 4446865 C2 DE4446865 C2 DE 4446865C2
- Authority
- DE
- Germany
- Prior art keywords
- ray
- mammography
- detector
- grid
- shaped
- 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
- 238000009607 mammography Methods 0.000 title claims description 8
- 230000005855 radiation Effects 0.000 claims description 11
- 230000003287 optical effect Effects 0.000 claims 1
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 241000124008 Mammalia Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001629 suppression Effects 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
- A61B6/50—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications
- A61B6/502—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications for diagnosis of breast, i.e. mammography
-
- 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
- A61B6/06—Diaphragms
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
- G21K1/00—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating
- G21K1/02—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators
- G21K1/04—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators using variable diaphragms, shutters, choppers
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Medical Informatics (AREA)
- Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Heart & Thoracic Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- Optics & Photonics (AREA)
- Pathology (AREA)
- Radiology & Medical Imaging (AREA)
- Biomedical Technology (AREA)
- Biophysics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Engineering & Computer Science (AREA)
- Dentistry (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Apparatus For Radiation Diagnosis (AREA)
Description
In der Röntgen-Mammographie werden Film-Folienkombinationen verwendet. Nachteilig ist dabei der Entwicklungsprozeß und der Zeitverzug, bis die Bilder zur Verfügung stehen. Zur Erzeu gung von Sofortbildern kann anstelle einer Film-Folienkombina tion ein CCD-Wandler für die verzögerungsfreie digitale Bild erzeugung verwendet werden. Wird dieser CCD-Wandler flächenhaft ausgebildet, wobei seine Fläche den gesamten Objektbereich ab deckt, so liegt nach einer Abtastung des CCD-Wandlers ein Bild in digitaler Form vor.In X-ray mammography there are film-film combinations used. The development process and is disadvantageous the time delay until the pictures are available. To generate Immediate images can be used instead of a film / film combination tion a CCD converter for the delay-free digital image generation can be used. This CCD converter becomes flat formed, its surface from the entire object area covers, there is an image after scanning the CCD converter in digital form.
In DE 38 25 703 A1 ist ein Röntgengerät mit einer beweglichen Schlitzblende zum Einblenden eines fächerförmigen Strahlen bündels beschrieben, das über ein Aufnahmefeld bewegbar ist, sowie mit einem Strahlendetektor, der vom Röntgenstrahlenbündel getroffen wird. Aufgrund der Schlitzaufnahmetechnik ist eine gute Streustrahlenunterdrückung erzielt.DE 38 25 703 A1 describes an X-ray device with a movable one Slit diaphragm to show a fan-shaped beam described bundle, which is movable over a recording field, as well as with a radiation detector from the X-ray beam is hit. Due to the slot recording technology is a good stray radiation suppression achieved.
In DE 44 36 687 A1 ist eine Röntgenaufnahmevorrichtung mit einem bewegten Streustrahlenraster für die Mammographie und einem flächenhaften Halbleiter-Bildwandler beschrieben. Die Ausbildung eines Röntgengerätes mit einer beweglichen Schlitzblende ist aus diesem nicht vorveröffentlichten Dokument nicht entnehmbar.DE 44 36 687 A1 includes an X-ray recording device a moving anti - scatter grid for mammography and described an areal semiconductor image converter. The Formation of an X-ray machine with a movable one Slit diaphragm is from this unpublished document not removable.
In US 4 403 150 ist eine Röntgenaufnahmeeinrichtung mit einem Halbleitersensor und mindestens einem diesem zugeordneten, ortsfesten Streustrahlenraster beschrieben. Die Ausführung einer Röntgenaufnahmeeinrichtung mit einem fächerförmigen, das Untersuchungsobjekt abtastenden Röntgenstrahlenbündel geht daraus nicht hervor.In US 4 403 150 an X-ray recording device with a Semiconductor sensor and at least one assigned to it Fixed anti-scatter grid described. Execution an X-ray recording device with a fan-shaped, the X-ray beam scanning object to be examined not from it.
Schließlich ist in DE 79 15 044 U1 ein zweiteiliges Streustrahlenraster für ein Röntgenaufnahmegerät beschrieben, bei dem die beiden Teile von zwei verstellbaren, flächenhaften Linienrastern gebildet sind. Auch hieraus ergibt sich die Ausbildung eines Röntgenaufnahmegerätes mit einer beweglichen Schlitzblende und einem fächerförmigen Strahlenbündel nicht.Finally, in DE 79 15 044 U1 is a two-part Anti-scatter grid for an X-ray imaging device described, where the two parts of two adjustable, flat Line grids are formed. This also results in the Training an X-ray machine with a movable Not a slit diaphragm and a fan-shaped beam.
Der Erfindung liegt die Aufgabe zugrunde, ein Mammographie- Röntgengerät zu schaffen, das verzögerungsfreie Digitalbilder der gesamten Mamma erzeugt, wobei Bildartefakte durch Streu strahlung gegenüber dem Stand der Technik noch weiter reduziert sind.The invention has for its object a mammography X-ray machine to create the instantaneous digital images of the entire mammal, with image artifacts due to stray radiation even further reduced compared to the prior art are.
Diese Aufgabe ist erfindungsgemäß gelöst durch die Merkmale des Patentanspruches 1. Weiterbildungen ergeben sich aus den Unteransprüchen.According to the invention, this object is achieved by the features of claim 1. Further developments result from the Dependent claims.
Die Erfindung ist nachfolgend anhand eines in der Zeichnung dargestellten Ausführungsbeispieles näher erläutert. Es zeigen:The invention is based on one in the drawing illustrated embodiment explained in more detail. Show it:
Fig. 1 ein Mammographie-Röntgengerät nach der Erfindung, und Fig. 1 is a mammography X-ray device according to the invention, and
Fig. 2 eine Einzelheit des Gerätes nach Fig. 1. FIG. 2 shows a detail of the device according to FIG. 1.
In der Fig. 1 ist der Fokus 1 einer Röntgenröhre dargestellt, von dem ein fächerförmiges Röntgenstrahlenbündel 2 ausgeht, das durch eine in Richtung des Pfeiles 3 verstellbare Schlitz blende 4 eingeblendet wird. Der Schlitz in der Schlitzblende 4 erstreckt sich dabei senkrecht zur Zwischenebene. In Strahlen richtung gesehen nach der Schlitzblende 3 folgt das Objekt 5, nämlich eine Mamma, und danach ein Strahlendetektor, welcher aus einem Szintillator 6 und einem CCD-Wandler 7 besteht. Zur Eliminierung der Streustrahlung ist mit einer Schlitzblende 4 ein Streustrahlenraster 8 verstellbar, und zwar derart, daß das Röntgenstrahlenbündel 2 in jeder Position zuerst das Streu strahlenraster 8 durchsetzt, bevor es auf dem Detektor 5, 7 auftrifft. Dem CCD-Wandler 7 ist ein Rechner 9 nachgeschaltet, der aus dessen Ausgangssignalen ein Röntgenbild berechnet, welches auf einem Monitor 10 wiedergegeben wird.In Fig. 1, the focus 1 of an X-ray tube is shown, from which a fan-shaped X-ray beam 2 emanates, which is faded in by a slit diaphragm 4 adjustable in the direction of arrow 3 . The slot in the slit 4 extends perpendicular to the intermediate plane. Seen in the radiation direction after the slit diaphragm 3 follows the object 5 , namely a mom, and then a radiation detector, which consists of a scintillator 6 and a CCD converter 7 . For the elimination of the scattered radiation is a stray radiation grid 8 is provided with a slit diaphragm 4 adjustable in such a manner that the X-ray beam 2 passes first through the anti-scatter grid 8 in any position, before impinging on the detector 5. 7 The CCD converter 7 is followed by a computer 9 which calculates an X-ray image from its output signals, which is displayed on a monitor 10 .
Die Fig. 2 zeigt, daß die Lamellen 11 des Streustrahlenrasters 8 schräg zur Bewegungsrichtung des Streustrahlenrasters 8 ver laufen, die durch einen Pfeil 12 angegeben ist. Dadurch ist er reicht, daß die Lamellen 11 nicht auf dem Detektor 6, 7 abge bildet werden. Der Winkel, unter dem die Lamellen 11 gegenüber der Bewegungsrichtung des Streustrahlenrasters 8 geneigt sind, kann in der Größenordnung von 45° liegen. Fig. 2 shows that the slats 11 of the anti-scatter grid 8 run obliquely to the direction of movement of the anti-scatter grid 8 , which is indicated by an arrow 12 . This is enough that the slats 11 are not formed on the detector 6 , 7 abge. The angle at which the slats 11 are inclined with respect to the direction of movement of the anti-scatter grid 8 can be of the order of 45 °.
Es ist auch möglich, nicht einen flächenhaften Detektor 6, 7, wie dargestellt, sondern einen streifenförmigen Detektor zu verwenden, der in seinen Quer- und Längsabmessungen den Ab messungen des Streustrahlenrasters 8 entspricht, also einen senkrecht zur Zeichenebene verlaufenden Streifen bildet, und dann zur Bilderzeugung zusammen mit dem Streustrahlenraster 8 um einen Weg verstellt wird, der der Breite des dargestellten Detektors 6, 7 entspricht.It is also possible not to use a flat detector 6 , 7 , as shown, but to use a strip-shaped detector which corresponds in its transverse and longitudinal dimensions to the dimensions of the anti-scatter grid 8 , that is to say forms a strip running perpendicular to the plane of the drawing, and then to Image generation is adjusted together with the anti-scatter grid 8 by a path which corresponds to the width of the detector 6 , 7 shown .
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19944446865 DE4446865C2 (en) | 1994-12-27 | 1994-12-27 | X-ray mammography machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19944446865 DE4446865C2 (en) | 1994-12-27 | 1994-12-27 | X-ray mammography machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE4446865A1 DE4446865A1 (en) | 1996-07-11 |
| DE4446865C2 true DE4446865C2 (en) | 2001-06-21 |
Family
ID=6537299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19944446865 Expired - Fee Related DE4446865C2 (en) | 1994-12-27 | 1994-12-27 | X-ray mammography machine |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE4446865C2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004053009A1 (en) * | 2004-10-29 | 2006-05-11 | Siemens Ag | Exposing object e.g. patient chest, illustrating method, involves arranging scattered radiation raster between exposing object and x-ray detector, and moving raster away from path of radiation of x-ray depending on thickness of object |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4403150A (en) * | 1980-02-27 | 1983-09-06 | Tokyo Shibaura Denki Kabushiki Kaisha | Semiconductor radiation sensor arrangement for an automatic X-ray exposure control apparatus |
| DE7915044U1 (en) * | 1979-05-23 | 1984-10-18 | Siemens AG, 1000 Berlin und 8000 München | Anti-scatter grid |
| DE3825703A1 (en) * | 1988-07-28 | 1990-02-01 | Siemens Ag | X-RAY DIAGNOSTIC DEVICE WITH RECTANGULAR DETECTOR ARRANGEMENT |
| DE4436687A1 (en) * | 1994-10-13 | 1996-04-25 | Siemens Ag | X-ray pick-up appts. for mammography |
-
1994
- 1994-12-27 DE DE19944446865 patent/DE4446865C2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE7915044U1 (en) * | 1979-05-23 | 1984-10-18 | Siemens AG, 1000 Berlin und 8000 München | Anti-scatter grid |
| US4403150A (en) * | 1980-02-27 | 1983-09-06 | Tokyo Shibaura Denki Kabushiki Kaisha | Semiconductor radiation sensor arrangement for an automatic X-ray exposure control apparatus |
| DE3825703A1 (en) * | 1988-07-28 | 1990-02-01 | Siemens Ag | X-RAY DIAGNOSTIC DEVICE WITH RECTANGULAR DETECTOR ARRANGEMENT |
| DE4436687A1 (en) * | 1994-10-13 | 1996-04-25 | Siemens Ag | X-ray pick-up appts. for mammography |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004053009A1 (en) * | 2004-10-29 | 2006-05-11 | Siemens Ag | Exposing object e.g. patient chest, illustrating method, involves arranging scattered radiation raster between exposing object and x-ray detector, and moving raster away from path of radiation of x-ray depending on thickness of object |
| US7327826B2 (en) | 2004-10-29 | 2008-02-05 | Siemens Aktiengesellschaft | X-ray imaging apparatus and operating method therefor, with subject thickness-dependent use of a scattered ray grid |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4446865A1 (en) | 1996-07-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OP8 | Request for examination as to paragraph 44 patent law | ||
| D2 | Grant after examination | ||
| 8364 | No opposition during term of opposition | ||
| 8339 | Ceased/non-payment of the annual fee |