EP1648019A1 - Dispositif de radiographie de type a fonctionnement a balayage et variantes - Google Patents

Dispositif de radiographie de type a fonctionnement a balayage et variantes Download PDF

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Publication number
EP1648019A1
EP1648019A1 EP04748960A EP04748960A EP1648019A1 EP 1648019 A1 EP1648019 A1 EP 1648019A1 EP 04748960 A EP04748960 A EP 04748960A EP 04748960 A EP04748960 A EP 04748960A EP 1648019 A1 EP1648019 A1 EP 1648019A1
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EP
European Patent Office
Prior art keywords
radiation
cathode
ionizing
ionizing radiation
detector
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
Application number
EP04748960A
Other languages
German (de)
English (en)
Other versions
EP1648019A4 (fr
Inventor
Semen Efimovich Baru
Vladimir Romanovich Groshev
Victor Vasilyevich Leonov
Vyacheslav Victorovich Porosev
Gennadiy Alekseevich Savinov
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.)
BUDKER INSTITUTE OF NUCLEAR PHYSICS RUSSIAN ACADEMY OF SCIENCES SIBERIAN BRANCH
Original Assignee
BUDKER INSTITUTE OF NUCLEAR PHYSICS RUSSIAN ACADEMY OF SCIENCES SIBERIAN BRANCH
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 BUDKER INSTITUTE OF NUCLEAR PHYSICS RUSSIAN ACADEMY OF SCIENCES SIBERIAN BRANCH filed Critical BUDKER INSTITUTE OF NUCLEAR PHYSICS RUSSIAN ACADEMY OF SCIENCES SIBERIAN BRANCH
Publication of EP1648019A1 publication Critical patent/EP1648019A1/fr
Publication of EP1648019A4 publication Critical patent/EP1648019A4/fr
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J47/00—Tubes for determining the presence, intensity, density or energy of radiation or particles
    • H01J47/02—Ionisation chambers
    • H01J47/04—Capacitive ionisation chambers, e.g. the electrodes of which are used as electrometers

Definitions

  • the invention belongs to the field of registration of X-rays and can be used both in medical radiography and for physical search for security purposes for the purpose of detecting dangerous and hidden in or on the body or in clothing items or fabrics.
  • the resolution of scintillation detectors does not exceed 1-2 line pairs per mm.
  • the maximum channel width is 1 mm
  • sintillation electronic radiation detectors are new generation hard-body detectors, state, development prospects, industrial application, sv D. Ryzhikov et al., Preprint., Chartcov, Scientific Technological Group "Monokristallov Institute” / Institute of Monocrystals , 1996]
  • detectors with non-light isolated channels such detectors as used in the paper Automated by SN Selesnev et al., 1996, No. 6, p. 80, is the spatial resolution due to light binding It is 1.3 line pairs per mm, and a reduction in the scintillator width to improve the resolution results in a deterioration in the quality of the detector due to the efficiency reduction of the photon registration.
  • This plant comprises an ionizing radiation source whose radiation diverge, a collimator in the form of an elongated gap, wherein the collimator a flat radiation beam supplies, a registration device of the flat radiation beam, wherein the radiation passes through the object to be examined, and a read-out electronics.
  • the registration device includes at least one ionization particle detector having a gas chamber with a side and front radiation input window and three flat electrodes arranged in parallel with each other. In the space between the first electrode and the second electrode, the radiation is converted into electrons, and amplification is achieved in the space between the second and third electrodes by multiplication of these electrons.
  • the disadvantage of this device is the three-electrode system in which the second electrode should be transparent, so that the electrons produced in the conversion space reach the multiplication space.
  • Such an electrode is mostly made of wires that vibrate when scanned, thereby significantly degrading the work of the detector.
  • the gas amplification also limits the quick action of the detector due to the influence of the space charge and allows the filling of the detector with gas under a pressure of about 10 6 Pa (10at) not to, be limited so that the spatial resolution.
  • Another disadvantage associated with the use of gas boosting is the requirement for the purity of the gas mixture, which must be replaced more often.
  • the object of the invention is the development of a high-resolution X-ray system, more efficient registration of ionization quanta, which ensures a greater charge capacity, and with a simpler and thus safer structure.
  • an ionizing radiation source in the known, scanning, radiographic system an ionizing radiation source, a collimator in the form of an elongated gap, which is intended to generate a flat radiation beam, and a registration device of the radiation beam, wherein the radiation through the subject to be examined, including readout, data processing and output electronics and at least one detector of ionizing particles are provided, which has a dense, gas-filled housing, which consists of radiation-transparent material at least at the entry and exit point of the ionizing radiation and in a planar capacitor is arranged parallel to the surface of the radiation path with a lying on both sides of the capacitor full anode and cathode; the cathode is divided into strips which are fan-shaped and aligned to a point which is the focal point of the X-ray source; the stripe length of the cathode is designed to ensure complete interaction of the ionization radiation, each stripe being connected to a single storage capacitor whose charge is read by the electronics.
  • the space between the housing wall at the entrance of the radiation and the planar capacitor may be filled with a dielectric medium having a lower ionization radiation absorption compared to the gas.
  • the dielectric means may be partially disposed between the anode and the cathode of the flat capacitor.
  • the solid anode and the cathode of the planar capacitor are provided at the leading edges in the direction of the radiation beam with plates of ionizing radiation absorbing material which together with the intervening dielectric means form a diaphragm.
  • an additional body can be arranged, which is intended to fix the space between them.
  • the membrane formed by plates of the ionizing radiation absorbing material and the dielectric agent provide the required resolution in the scanning direction and reduce the demands on the allowable vibration level and on the adjustment of individual parts of the scanning system.
  • the system comprises an ionization radiation source 1, which is preferably an X-ray source, a collimator 2, designed in the form of a diaphragm with an oblong gap for producing a flat radiation beam 3, a radiation detector 4 passing through an object 5 to be examined, which has a sealed housing 6 and filled with gas under a pressure of 20-49 at and at least at the input point of the radiation for the ionizing radiation permeable material, wherein in the radiation detector 4, a flat capacitor with a solid anode 7 and a divided into strips cathode 8 is.
  • the solid anode 7 and the cathode 8 are arranged on opposite sides of the flat radiation beam, which runs parallel to the object to be examined.
  • the strips are fan-shaped and aligned to a point which is the focal point of the ionizing radiation.
  • the length of the strips is designed so that the ionizing radiation can interact with the gas in the space between the solid anode 7 and the cathode 8 to almost 100%.
  • a dielectric means 9 is disposed between the housing wall 6 at the entrance of the radiation and the planar capacitor and projects partially into the space between the solid anode 7 and the cathode 8 of the capacitor.
  • Radiopaque material plates 10 secured to the edges of the solid anode 7 and the cathode 8 together with the dielectric means 9 form a diaphragm which ensures the required tripping in the scanning direction.
  • An additional body 11 located between the solid anode 7 and the cathode 8 at the end of the radiation path fixes the space therebetween.
  • a read-out, data processing and output electronics 12 is partially disposed within and partially outside the detector housing 6.
  • the system works in the following way.
  • the ionization radiation of the source 1 passes through the collimator 2, taking the form of a flat radiation beam 3, and passes after passing through the object to be examined 5 to the detector 4 in the condenser space between the electrodes 7, 8 of the planar capacitor, the is under high voltage and ionizing the housing 6 filling gas to form electrons and ions.
  • the charges travel to the solid anode 7 and cathode 8, charging the capacitors connected to the strips of the cathode 8.
  • the charge accumulated on each strip is measured by the read, data processing and output electronics 12.
  • the X-ray image is then generated by scanning the detector together with the radiation source 1 along the object 5 to be examined.
  • the invention can be used in many fields of science, business and medicine.
  • a large dynamic range of the gas detector allows the system to be used to detect the internal structure of various materials, products and devices in the industry.
  • the device can be used in repeated, preventive X-ray examinations on both the patient and the healthy person.
EP04748960A 2003-07-08 2004-07-06 Dispositif de radiographie de type a fonctionnement a balayage et variantes Pending EP1648019A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2003120994/28A RU2257639C2 (ru) 2003-07-08 2003-07-08 Рентгенографическая установка сканирующего типа (варианты)
PCT/RU2004/000266 WO2005004190A1 (fr) 2003-07-08 2004-07-06 Dispositif de radiographie de type a fonctionnement a balayage et variantes

Publications (2)

Publication Number Publication Date
EP1648019A1 true EP1648019A1 (fr) 2006-04-19
EP1648019A4 EP1648019A4 (fr) 2009-05-06

Family

ID=33563178

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04748960A Pending EP1648019A4 (fr) 2003-07-08 2004-07-06 Dispositif de radiographie de type a fonctionnement a balayage et variantes

Country Status (4)

Country Link
EP (1) EP1648019A4 (fr)
CN (1) CN1849692A (fr)
RU (1) RU2257639C2 (fr)
WO (1) WO2005004190A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2424535C1 (ru) * 2010-04-12 2011-07-20 Общество С Ограниченной Ответственностью "Консультации По Оптимизации Инвестиций И Структур" (Ооо "Оис-Консалтинг") Способ рентгеновского контроля тела человека
RU2530903C1 (ru) * 2013-03-01 2014-10-20 Федеральное государственное автономное образовательное учреждение высшего образования "Новосибирский национальный исследовательский государственный университет" (Новосибирский государственный университет, НГУ) Многоканальная газовая ионизационная камера
RU2612058C1 (ru) * 2015-12-22 2017-03-02 Федеральное государственное бюджетное учреждение науки Институт ядерной физики им. Г.И. Будкера Сибирского отделения РАН (ИЯФ СО РАН) Рентгенографическая установка
CN108445525B (zh) * 2018-01-31 2024-03-19 张岚 面阵列像素探测器、辐射探测系统及辐射场探测方法
RU189440U9 (ru) * 2019-01-10 2019-08-14 Публичное акционерное общество "Межрегиональная распределительная сетевая компания Юга" (ПАО "МРСК Юга") Мобильное устройство рентгенографического контроля высоковольтных выключателей

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1561007A (en) * 1976-04-12 1980-02-13 Gen Electric Ray detectors
US4275305A (en) * 1976-09-13 1981-06-23 General Electric Company Tomographic scanning apparatus with ionization detector means
WO2001059480A1 (fr) * 2000-02-08 2001-08-16 Xcounter Ab Detecteur et procede de detection de rayonnement ionisant
US6518578B1 (en) * 1999-04-14 2003-02-11 Xcounter Ab Method for detecting ionizing radiation, a radiation detector and an apparatus for use in planar beam radiography

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU811367A1 (ru) * 1978-10-02 1981-03-07 Предприятие П/Я Р-6303 Детектор рентгеновского излучени
RU2098929C1 (ru) * 1995-05-29 1997-12-10 Государственный научно-исследовательский институт "Пульсар" Рентгенографическая установка для медицинской диагностики
SE514475C2 (sv) * 1999-04-14 2001-02-26 Xcounter Ab Strålningsdetektor, en anordning för användning vid radiografi med plant strålknippe och ett förfarande för detektering av joniserande strålning

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1561007A (en) * 1976-04-12 1980-02-13 Gen Electric Ray detectors
US4275305A (en) * 1976-09-13 1981-06-23 General Electric Company Tomographic scanning apparatus with ionization detector means
US6518578B1 (en) * 1999-04-14 2003-02-11 Xcounter Ab Method for detecting ionizing radiation, a radiation detector and an apparatus for use in planar beam radiography
WO2001059480A1 (fr) * 2000-02-08 2001-08-16 Xcounter Ab Detecteur et procede de detection de rayonnement ionisant

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2005004190A1 *

Also Published As

Publication number Publication date
RU2257639C2 (ru) 2005-07-27
EP1648019A4 (fr) 2009-05-06
WO2005004190A1 (fr) 2005-01-13
CN1849692A (zh) 2006-10-18
RU2003120994A (ru) 2005-01-10

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