DE8618125U1 - Radiation-absorbing staircase - Google Patents

Radiation-absorbing staircase

Info

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
Application number
DE19868618125
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PRIER RAINER 8000 MUENCHEN DE
Original Assignee
PRIER RAINER 8000 MUENCHEN DE
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by PRIER RAINER 8000 MUENCHEN DE filed Critical PRIER RAINER 8000 MUENCHEN DE
Priority to DE19868618125 priority Critical patent/DE8618125U1/en
Publication of DE8618125U1 publication Critical patent/DE8618125U1/en
Expired legal-status Critical Current

Links

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

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  • 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

Rainer Prier: Strahlenabsorbierende Treppe Rainer Prier: Radiation-absorbing staircase

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.

Das Gerät zur Konstanzprüfung an zahnmedizinischenThe device for constancy testing on dental

&rgr; Röntgenanlagen (Gebrauchsmusteranaa!dung G 85 35 120.2 k &rgr; X-ray systems (utility model application G 85 35 120.2 k

O Anmeldernr.: 2863712) besteht aus:O Applicant No.: 2863712) consists of:

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

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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)

s*-»w»w»«^4i!»»T*«s*«SiSfB^^ Rainer Prier: Strahlenabsorbierende Treppe München 80 Schutzansprüches*-»w»w»«^4i!»»T*«s*«SiSfB^^ Rainer Prier: Radiation-absorbing staircase Munich 80 protection claims 1.) Strahlenabsorbierende Treppe,dadurch gekennzeichnet, daß die Basis der Treppe aus einem stark absorbieren Material besteht und die weiteren Stuf^a. aus einem schwach absorbierendem Material. 1.) Radiation-absorbing staircase, characterized in that the base of the staircase consists of a strongly absorbent material and the further steps of a weakly absorbent material. 2.) Strahlenabsorbierende Treppe nach Anspruch 1,2.) Radiation-absorbing staircase according to claim 1, C)C) dadurch gekennzeichnet,daß das stark absorbiendecharacterized in that the highly absorbent Metall Cr, Fe, Ni vorzugsweise Kupfer auf die Kunststoff- oder sonstigem Material- mit einer effektiven Ordnungezahl kleiner als 14, vorzugsweise Teflontreppe aufgeklebt ist.Metal Cr, Fe, Ni, preferably copper, is glued to the plastic or other material with an effective atomic number less than 14, preferably Teflon. 3.) Strahlenabsorbierende Treppe nach Anspruch 1, dadurch gekennzeichnet,daß die Kupferfolie 0,2 bis 1,5 mm,vorzugsweise 0,3 mm dick ist.3.) Radiation-absorbing staircase according to claim 1, characterized in that the copper foil is 0.2 to 1.5 mm, preferably 0.3 mm thick. 4.) Strahlenabsorbierende Treppe nach Anspruch 1,4.) Radiation-absorbing staircase according to claim 1, dadurch gekennzeichnet,daß die Teflontreppe eine Stufenhöhe von 1,5 bis 5,mm,vorzugsweise 3 mm, besitzt.characterized in that the Teflon staircase has a step height of 1.5 to 5 mm, preferably 3 mm. * * i »ti «a·« ■■
• * ♦ »4 · et « ■ t · t * * i »ti «a·« ■■
• * ♦ »4 · et « ■ t · t
DE19868618125 1986-07-07 1986-07-07 Radiation-absorbing staircase Expired DE8618125U1 (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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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