DE8618125U1 - Radiation-absorbing staircase - Google Patents
Radiation-absorbing staircaseInfo
- Publication number
- DE8618125U1 DE8618125U1 DE19868618125 DE8618125U DE8618125U1 DE 8618125 U1 DE8618125 U1 DE 8618125U1 DE 19868618125 DE19868618125 DE 19868618125 DE 8618125 U DE8618125 U DE 8618125U DE 8618125 U1 DE8618125 U1 DE 8618125U1
- Authority
- DE
- Germany
- Prior art keywords
- staircase
- radiation
- absorbing
- teflon
- absorbent material
- 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
Links
- 239000004809 Teflon Substances 0.000 claims description 5
- 229920006362 Teflon® Polymers 0.000 claims description 5
- 230000002745 absorbent Effects 0.000 claims description 5
- 239000002250 absorbent Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000011889 copper foil Substances 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 244000309464 bull Species 0.000 claims 1
- 239000004033 plastic Substances 0.000 claims 1
- 238000012360 testing method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000001228 spectrum 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
- A61B6/58—Testing, adjusting or calibrating thereof
- A61B6/582—Calibration
- A61B6/583—Calibration using calibration phantoms
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
- G03C5/02—Sensitometric processes, e.g. determining sensitivity, colour sensitivity, gradation, graininess, density; Making sensitometric wedges
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
- G03C5/16—X-ray, infrared, or ultraviolet ray processes
-
- 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
- G21K1/10—Scattering devices; Absorbing devices; Ionising radiation filters
Landscapes
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Medical Informatics (AREA)
- High Energy & Nuclear Physics (AREA)
- General Physics & Mathematics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Biomedical Technology (AREA)
- General Engineering & Computer Science (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Optics & Photonics (AREA)
- Pathology (AREA)
- Radiology & Medical Imaging (AREA)
- Biophysics (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Description
Die Erfindung betrifft eine besondere strahlenabsorbierende Treppe (Prüfkörper).Aufnahmen dieser Treppen dienen zur Überprüfung von Entwicklungseinrichtungen,insbesondere bei &zgr;ahnmedizinischen Röntgenanlagen.The invention relates to a special radiation-absorbing staircase (test specimen). Images of these staircases are used to check development facilities, particularly dental X-ray systems.
&rgr; Röntgenanlagen (Gebrauchsmusteranaa!dung G 85 35 120.2 k &rgr; X-ray systems (utility model application G 85 35 120.2 k
1.) einer strahlenabsorbierenden Treppe, deren strahlenschwächende Wirkung so ausgelegt ist, daß eine bestimmte Stufe in Ihrer Absorption der oberen Holaren entspricht (effektive Ordnungszahl 13, Kupferfolie 0,3 mm, Teflonschicht 3 mm).Bei der Prüfung sind Aufnahmen von der strahlenabsorbierenden Treppe anzufertigen. Die Stufenhöhe ist so ausgelegt, daß der Unterschied der optischen Dichten zwischen den Stufen den Toleranzwerten nach DIN 6868 entspricht. 2.) einem Strahlendetektor,der hinter der strahlenabsorbierenden Treppe (filmseitig) angeordnet ist. 3.) einem Meßteil und einem Anzeigeteil,die das1.) a radiation-absorbing staircase, the radiation-attenuating effect of which is designed so that a certain step corresponds in its absorption to the upper holar (effective atomic number 13, copper foil 0.3 mm, Teflon layer 3 mm). During the test, pictures of the radiation-absorbing staircase must be taken. The step height is designed so that the difference in optical density between the steps corresponds to the tolerance values according to DIN 6868. 2.) a radiation detector, which is arranged behind the radiation-absorbing staircase (on the film side). 3.) a measuring part and a display part, which
Signal des Detektors auswerten. 4.) einer Zentrierhilfe die gleichzeitig zurEvaluate the detector signal. 4.) a centering aid which also serves to
überprüfung der Strahlenrichtung benutzt werden kannjdiese besteht aus angebrachten Kreisen,bzw. Rechtecken,die in ihren Abmessungen den gängigen Tubusabmessungen angepaßt sind.can be used to check the beam direction. This consists of attached circles or rectangles, the dimensions of which are adapted to the standard tube dimensions.
Ineiner Ausführungsform besteht das Gerät aus einer dreistufigen Aluminiumtreppe (8mm,10mm,12 mm),einem Halbleiterfotodetektor,einer Auswertschaltung und einem Digitalvoltmeter, die in einem Gehäuse zusammengefaßt sind.In one embodiment, the device consists of a three-stage aluminum staircase (8 mm, 10 mm, 12 mm), a semiconductor photodetector, an evaluation circuit and a digital voltmeter, which are combined in a housing.
-2--2-
WSffiWSffi
&igr;,&igr;,
Il I»The I»
Rainer PrierV strahlenabsorbieVende Treppe Rainer PrierV radiation-absorbing staircase
-2--2-
Die bisher zur Kontrolle von Röntgenanlagen verwendeten strahlenabsorbierenden Treppen zeigen eine Abhängigkeit der Grauabstufungen von der Röhrenspannung. Diese Tatsache ist bei der Überprüfung von Filmverarbeitungseinrichtungen von Nachteil, und wird erfindungsgemäß -von der beschriebenen Treppe vermieden.The radiation-absorbing steps previously used for checking X-ray systems show a dependence of the gray gradations on the tube voltage. This fact is a disadvantage when checking film processing equipment and is avoided according to the invention by the steps described.
Der neue Prüfkörper besteht aus einer stark absorbierenden Metallfolie (Cr* Fe, Ni1Cu),vorzugsweise Kupfer,auf der eine Treppe aus schwach absorbieren Material (effektive Ordnungszahl kleiner als 14),vorzugsweise Teflon angebracht ist. Die Wirkungsweise dieser Treppe beruht auf der energieabhängigen Konditionierung (Cu) des primären Strahlenspektrums bei anschließender von der Energieverteilung unabhängiger Schwächung (Teflon). Dadurch ist sichergestellt, daß unabhängig von der verwendeten Röhrenspannung gleiche Grauabstufungen auf Röntgenaufnahmen des Prüfkörpers erzeugt werden. The new test specimen consists of a highly absorbent metal foil (Cr* Fe, Ni 1 Cu), preferably copper, onto which a staircase made of weakly absorbent material (effective atomic number less than 14), preferably Teflon, is attached. The effect of this staircase is based on the energy-dependent conditioning (Cu) of the primary radiation spectrum with subsequent attenuation (Teflon) independent of the energy distribution. This ensures that the same shades of grey are produced on X-ray images of the test specimen, regardless of the tube voltage used.
-3--3-
Claims (4)
• * ♦ »4 · et « ■ t · t * * i »ti «a·« ■■
• * ♦ »4 · et « ■ t · t
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19868618125 DE8618125U1 (en) | 1986-07-07 | 1986-07-07 | Radiation-absorbing staircase |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19868618125 DE8618125U1 (en) | 1986-07-07 | 1986-07-07 | Radiation-absorbing staircase |
Publications (1)
Publication Number | Publication Date |
---|---|
DE8618125U1 true DE8618125U1 (en) | 1986-12-04 |
Family
ID=6796242
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19868618125 Expired DE8618125U1 (en) | 1986-07-07 | 1986-07-07 | Radiation-absorbing staircase |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE8618125U1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0449083A1 (en) * | 1990-03-26 | 1991-10-02 | General Electric Company | Bow-tie X-ray filter assembly for dual energy tomography |
-
1986
- 1986-07-07 DE DE19868618125 patent/DE8618125U1/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0449083A1 (en) * | 1990-03-26 | 1991-10-02 | General Electric Company | Bow-tie X-ray filter assembly for dual energy tomography |
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