DE1079448B - Arrangement for aligning a compensation filter - Google Patents
Arrangement for aligning a compensation filterInfo
- Publication number
- DE1079448B DE1079448B DEM40446A DEM0040446A DE1079448B DE 1079448 B DE1079448 B DE 1079448B DE M40446 A DEM40446 A DE M40446A DE M0040446 A DEM0040446 A DE M0040446A DE 1079448 B DE1079448 B DE 1079448B
- Authority
- DE
- Germany
- Prior art keywords
- filter
- arrangement
- aligning
- image
- relief
- 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.)
- Pending
Links
- 230000005855 radiation Effects 0.000 claims description 6
- 230000035699 permeability Effects 0.000 claims description 2
- 230000001788 irregular Effects 0.000 description 1
- 239000012780 transparent material Substances 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
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computed tomography [CT]
- A61B6/032—Transmission computed tomography [CT]
-
- 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
- A61B6/40—Arrangements for generating radiation specially adapted for radiation diagnosis
- A61B6/4035—Arrangements for generating radiation specially adapted for radiation diagnosis the source being combined with a filter or grating
-
- 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
-
- 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
- A61B6/505—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 bone
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Medical Informatics (AREA)
- Radiology & Medical Imaging (AREA)
- Biomedical Technology (AREA)
- Biophysics (AREA)
- High Energy & Nuclear Physics (AREA)
- Veterinary Medicine (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Optics & Photonics (AREA)
- Pathology (AREA)
- Public Health (AREA)
- Physics & Mathematics (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Dentistry (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Pulmonology (AREA)
- Theoretical Computer Science (AREA)
- Apparatus For Radiation Diagnosis (AREA)
Description
Anordnung zum Ausrichten eines Ausgleichsfilters Die Erfindung betrifft eine Anordnung zum Ausrichten eines mit einem reliefartigen Abbild des Obfeldes versehenen Ausgleichsfilters für Röntgenaufnahmen von Objekten mit örtlich wechselnder Strahlendurchlässigkeit mit Hilfe eines Lichtvisiers.Arrangement for aligning a compensating filter The invention relates to an arrangement for aligning one with a relief-like image of the obfield Equipped compensation filter for X-rays of objects with locally changing Radiation permeability with the help of a light localizer.
Zum Ausgleich unterschiedlicher Objektdicken bei Röntgenaufnahmen sind reliefartig aufgebaute Ausgleichsfilter bekannt. Diese werden zwischen Röntgenröhre und dem aufzunehmenden Objekt angebracht und durch die Röntgenstrahlung auf letzteres projiziert. Hierbei ergibt sich die Schwierigkeit, das Filter richtig zu projizieren. Es muß in einem solchen Abstand zwischen Strahlenquelle und Objekt angebracht werden, daß die entsprechenden Punkte von Filter und Objekt übereinstimmen. Da die Abmessungen ein und derselben Obj ektart wegen verschiedener Körpergröße des Patienten wechseln, müssen bei gleichem Filterabstand und gleichem Abstand StrahlenquellObjekt verschieden große Filter für eine Objektart verwendet werden, oder es muß der Filterabstand von Fall zu Fall eingestellt werden. To compensate for different object thicknesses in x-rays compensating filters constructed in relief are known. These are between x-ray tube and attached to the object to be recorded and by the X-ray radiation on the latter projected. This results in the difficulty of projecting the filter correctly. It must be placed at such a distance between the radiation source and the object, that the corresponding points of filter and object match. As the dimensions change one and the same type of object due to different body sizes of the patient, must be different with the same filter spacing and the same spacing from the radiation source object Large filters can be used for an object type, or the filter spacing must be used to be adjusted on a case-by-case basis.
Eine solche wechselnde Einstellung des Filterabstandes kann nur dann richtig vorgenommen werden, wenn Einrichtungen vorhanden sind, welche die Übereinstimmung der Projektion des Filters mit dem Objekt erkennen lassen. Such a changing setting of the filter spacing can only then be made correctly when facilities are in place to ensure compliance the projection of the filter with the object.
Hierzu sind beispielsweise Bohrungen im Filter vorgeschlagen worden, welche mit durchsichtigen Stoffen gleicher Strahlenschwächung ausgefüllt sind. Es können damit einzelne Punkte des Filters mit den entsprechenden Punkten des Objektes in Ubereinstimmung gebracht werden. Die Einstellung erfolgt mittels eines bekannten Lichtvisiers. Der Nachteil dieser Anordnung liegt darin, daß nur nach vereinzelten Punkten eingestellt werden kann und daß ferner diese Marken nicht oder nur mit sehr hohem Aufwand so ausgebildet werden können, daß sie auf dem Röntgenbild keine Schatten oder Aufhellungen erzeugen. Infolgedessen hat sich dieses Verfahren in der Praxis nicht eingeführt. For this purpose, for example, holes in the filter have been proposed, which are filled with transparent materials with the same radiation attenuation. It can use it to match individual points of the filter with the corresponding points of the object be brought into agreement. The setting is made by means of a known Light visors. The disadvantage of this arrangement is that only after a few Points can be set and that these brands also not or only with very can be designed with great effort so that they do not have any shadows on the X-ray image or create lightening. As a result, this procedure has proven itself in practice not introduced.
Es ist die Aufgabe gestellt, ein Ausgleichsfilter zu schafEen, welches mittels eines bekannten Lichtvisiers in allen Einzelteilen mit dem Objekt deutlich zur Übereinstimmung gebracht werden kann und welches für alle Patientengrößen bei einer Objektart anwendbar ist. The task is to create a compensation filter which by means of a known light sight in all individual parts with the object clearly can be matched and which for all patient sizes an object type is applicable.
Die Lösung wurde erfindungsgemäß mit Hilfe einer durchsichtigen Einstellplatte erzielt, die eine im gleichen Maßstab wie das Reliefbild des Filters gegenüber dem Objekt verkleinerte Schemazeichnung der aufzunehmenden Objektart aufweist und am Blendenort gegen die Blende auswechselbar ist. Eingestellt wird nach dieser Zeichnung, belichtet wird mit dem an ihrer Stelle tretenden Ausgleichsfilter. The solution was made according to the invention with the aid of a transparent adjustment plate achieved the one on the same scale as the relief image of the filter compared to the Object has scaled-down scheme drawing of the object type to be recorded and on Aperture location is interchangeable with the aperture. Adjustments are made according to this drawing, is exposed with the compensating filter taking its place.
Fig. 1 zeigt ein Ausführungsbeispiel einer solchen Platte mit Schemazeichnung einer Ganz-Wirbelsäule. Fig. 1 shows an embodiment of such a plate with a schematic drawing a whole spine.
Fig. 2 zeigt das dazugehörige Ausgleichsfilter im Längsschnitt. Fig. 3 zeigt im Querschnitt diese beiden Teile, beispielsweise durch ein Scharnier verbunden.Fig. 2 shows the associated compensating filter in a longitudinal section. Fig. 3 shows these two parts in cross section, for example connected by a hinge.
Diese Anordnung kann in einer an sich bekannten Auslegerhalterung befestigt werden, welche beispielsweise an der bekannten Aufnahme-Stativsäule des Röntgengerätes zwischen Röntgenröhre und Objekt verschieblich angebracht ist. Die Anordnung für die Aufnahme zeigt Fig. 4, wobei das Stativ und die Halterungen weggelassen sind. In Fig. 5 ist gezeigt, wie das gleiche Filter durch Veränderung des Filterabstandes 4 bzw. 4' an einem kleineren Patienten angewendet werden kann.This arrangement can be in a cantilever holder known per se be attached, which for example on the well-known recording stand column of the X-ray device is mounted displaceably between the X-ray tube and the object. the The arrangement for the recording is shown in FIG. 4, the stand and the brackets being omitted are. In Fig. 5 it is shown how the same filter by changing the filter spacing 4 or 4 'can be used on a smaller patient.
Das Wechseln der Einstellplatte mit dem Ausgleichsfilter kann außer mittels Scharnier auch noch auf andere Arten erfolgen, beispielsweise indem die beiden Bestandteile nebeneinander in der Art eines Schieberahmens angeordnet werden. Changing the setting plate with the compensation filter can also by means of a hinge also take place in other ways, for example by the two components are arranged side by side in the manner of a sliding frame.
Die mittels der Einstellplatte erzielbare Genauigkeit ermöglicht es ferner, daß das Ausgleichsfilter mit einer Bleiumrandung, auch von unregelmäßiger Gestalt, versehen werden kann, welche das Bild auf das diagnostisch interessierende Gebiet ausblendet. Die Umrandung wird in diesem Falle ebenfalls auf der Einstellplatte eingezeichnet. The accuracy that can be achieved by means of the setting plate is made possible it also that the compensating filter with a lead border, also of irregular Shape, which can be provided, which the image on the diagnostically interesting Hides the area. In this case, the border is also on the setting plate drawn.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEM40446A DE1079448B (en) | 1959-02-10 | 1959-02-10 | Arrangement for aligning a compensation filter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEM40446A DE1079448B (en) | 1959-02-10 | 1959-02-10 | Arrangement for aligning a compensation filter |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1079448B true DE1079448B (en) | 1960-04-07 |
Family
ID=7303707
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEM40446A Pending DE1079448B (en) | 1959-02-10 | 1959-02-10 | Arrangement for aligning a compensation filter |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1079448B (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3069549A (en) * | 1960-04-27 | 1962-12-18 | Thompson Joseph Clay | X-ray timing apparatus |
EP0001523A1 (en) * | 1977-10-11 | 1979-04-18 | Compagnie Generale De Radiologie | Method and apparatus for axial transverse tomography |
DE3307725A1 (en) * | 1983-03-04 | 1984-09-06 | Stb Strahlentechnische Bilddiagnostik Heinz Fleck, 2080 Pinneberg | PROTECTIVE MASK FOR X-RAY ENGINEERING |
US5185775A (en) * | 1989-11-24 | 1993-02-09 | General Electric Cgr S.A. | X-ray apparatus including a homogenizing filter |
FR2693097A1 (en) * | 1992-07-03 | 1994-01-07 | Flageat Jean | Radiological system for human body examination - has head and femoral neck compensation module on rotatable pivoting support |
WO1994010908A2 (en) * | 1992-11-16 | 1994-05-26 | Lunar Corporation | Compact c-arm tomographic bone scanning system |
-
1959
- 1959-02-10 DE DEM40446A patent/DE1079448B/en active Pending
Non-Patent Citations (1)
Title |
---|
None * |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3069549A (en) * | 1960-04-27 | 1962-12-18 | Thompson Joseph Clay | X-ray timing apparatus |
EP0001523A1 (en) * | 1977-10-11 | 1979-04-18 | Compagnie Generale De Radiologie | Method and apparatus for axial transverse tomography |
DE3307725A1 (en) * | 1983-03-04 | 1984-09-06 | Stb Strahlentechnische Bilddiagnostik Heinz Fleck, 2080 Pinneberg | PROTECTIVE MASK FOR X-RAY ENGINEERING |
US5185775A (en) * | 1989-11-24 | 1993-02-09 | General Electric Cgr S.A. | X-ray apparatus including a homogenizing filter |
FR2693097A1 (en) * | 1992-07-03 | 1994-01-07 | Flageat Jean | Radiological system for human body examination - has head and femoral neck compensation module on rotatable pivoting support |
WO1994010908A2 (en) * | 1992-11-16 | 1994-05-26 | Lunar Corporation | Compact c-arm tomographic bone scanning system |
WO1994010908A3 (en) * | 1992-11-16 | 1994-09-01 | Lunar Corp | Compact c-arm tomographic bone scanning system |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE2302695C3 (en) | Photographic focusing screen camera | |
DE1297357B (en) | Device for measuring the interpupillary distance | |
DE1079448B (en) | Arrangement for aligning a compensation filter | |
DE2433580A1 (en) | SELECTION PROCEDURE FOR DETERMINING DYSMETRIC DYSLEXIA | |
DE1288245B (en) | Device for coordinating an eccentrically fixing eye with the healthy eye | |
DE1844885U (en) | COMPENSATION FILTER. | |
DE3425913A1 (en) | METHOD AND DEVICE FOR DETERMINING THE DIMENSIONS OF AN OBJECT BY PHOTOGRAPHIC WAY | |
DE726708C (en) | Photographic or cinematographic camera with interchangeable lenses and viewfinder with adjustable field of view | |
DE69519345T2 (en) | Device for diagnosis and treatment of scoliosis | |
DE1051677B (en) | Device for profiling templates for glasses | |
DE3344497A1 (en) | Universal supporting and fixing device for arms, legs, skull and X-ray cassettes | |
DE657249C (en) | Cassette holder for the X-ray examination | |
DE685256C (en) | Auxiliary device for telescope images | |
DE2127872C3 (en) | Device for producing an X-ray image of a dental arch | |
DE2335917A1 (en) | DEVICE FOR TAKING X-ray images of the temporomandibular joints | |
DE896700C (en) | X-ray irradiation machine | |
DE579802C (en) | Device for recording and viewing orthomorphic, stereoscopic X-ray images | |
DE373217C (en) | Apparatus for recording and displaying stereoscopic x-ray images | |
EP0228614B1 (en) | Diagnostic dental x-ray apparatus | |
DE654263C (en) | Device for making the line of mirror text to be printed visible in reading text | |
DE967779C (en) | X-ray recording device for the production of X-ray layer recordings | |
DE650682C (en) | Protective goggles with telescopes fitted into the holes in the glasses | |
DD249368A3 (en) | Filter arrangement or training on a cephalostat | |
DE625619C (en) | Dial indicator | |
DE391239C (en) | Straightener for setting the X-ray cone |