GB1374610A - Radiographic apparatus - Google Patents
Radiographic apparatusInfo
- Publication number
- GB1374610A GB1374610A GB5540471A GB5540471A GB1374610A GB 1374610 A GB1374610 A GB 1374610A GB 5540471 A GB5540471 A GB 5540471A GB 5540471 A GB5540471 A GB 5540471A GB 1374610 A GB1374610 A GB 1374610A
- Authority
- GB
- United Kingdom
- Prior art keywords
- powder
- filter device
- exposure
- different
- intensity
- 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
- 239000000843 powder Substances 0.000 abstract 11
- 230000005855 radiation Effects 0.000 abstract 3
- 239000006096 absorbing agent Substances 0.000 abstract 2
- 239000007788 liquid Substances 0.000 abstract 2
- 239000007787 solid Substances 0.000 abstract 2
- 238000003491 array Methods 0.000 abstract 1
- 239000011230 binding agent Substances 0.000 abstract 1
- ZOAIGCHJWKDIPJ-UHFFFAOYSA-M caesium acetate Chemical compound [Cs+].CC([O-])=O ZOAIGCHJWKDIPJ-UHFFFAOYSA-M 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 238000009499 grossing Methods 0.000 abstract 1
- 235000015110 jellies Nutrition 0.000 abstract 1
- 239000008274 jelly Substances 0.000 abstract 1
- 229910001338 liquidmetal Inorganic materials 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 abstract 1
- 229910052753 mercury Inorganic materials 0.000 abstract 1
- 238000002601 radiography Methods 0.000 abstract 1
- 229910052761 rare earth metal Inorganic materials 0.000 abstract 1
- 150000002910 rare earth metals Chemical class 0.000 abstract 1
- 239000000725 suspension Substances 0.000 abstract 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
-
- 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
- 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)
- Pulmonology (AREA)
- Theoretical Computer Science (AREA)
- Apparatus For Radiation Diagnosis (AREA)
Abstract
1374610 X-ray apparatus MEDINOVA AB 29 Nov 1971 [30 Nov 1970] 55404/71 Heading H5R [Also in Division G1] In radiography, in order to even out the exposure of the recording medium (a film fluorescent screen or image intensifier) over the whole area of the recording medium and so compensate for differences from area to area which occur due to differences in thickness, density at different portions of the object (person) being radiographed, a plurality of X-ray detectors are arranged beyond the object to sense the average intensities at different areas, and by means of a plurality of respective control means, a compensating filter device, which has a plurality of portions corresponding in number to the different areas, is varied in thickness by different amounts for the different respective areas. If a film is present while adjustment of filter device is made, the intensity from the source is low enough to avoid exposure of the film. Alternatively, the film is absent, but a low intensity is still used to avoid unnecessary exposure of the patient. The radiograph is then carried out with full intensity. The detectors may be located beyond the image plane; alternatively they may be located above the image plane and be sufficiently translucent to avoid shadow images on the film or mounted for removal before the radiograph is taken. The filter device may be moved outside the radiation path during the adjustment and then returned to the path for the radiographic exposure. In the embodiment of Fig. 2, 1 is the X-ray source, 3 the subject being radiographed and 5 the image plane where the recording medium is located. The filter device comprises two solid wedge-shaped absorbers 11a, 11b, which may be varied in position so as to prevent different thicknesses at two areas in the radiation path. The absorbers are moved under control of servomotors receiving the outputs of differential amplifiers 13a, 13b which compare signals representing the intensity in the respective areas of detectors 14a, 14b, with that at a central area of detector 15 which acts as a reference. Fig. 3 (not shown) illustrates a more complex arrangement, with two arrays of elongated detectors (and filter device elements) on either side of a central elongated reference detector. Since a diaphragm arrangement, formed by four plates and which is adjustable in two dimensions, is provided, the control link to the filter device includes potentiometers to allow for the positions of the diaphragm plates. Construction of filter device.-Besides solid bodies, liquid and powder media may be used. The arrangement of Fig. 4, comprises a radiation absorbing liquid 24, e.g. mercury or other liquid metal, a solution, e.g. cesium acetate solution, or a suspension, contained within a rigid base member 26 and a flexible, e.g. rubber diaphragm 27 having attached thereto a plurality of wires 28 coupled to the servomotors 31 so that the thickness of the device can be varied at different points across its area. The diaphragm has higher rigidity along lines joining the wires In another arrangement, Fig. 10, the medium 36 is a powder mixed with binding agent, a paste or a jelly carried in a tray 35. A dispensing member 51 is moved along the tray and its exit slot is shaped under the control of the servomotors so as to deliver the required layer thickness of the medium at different areas actoss the tray. At the same time a slit diaphragm is moved across the image plane. The tray may be arranged for use with a powder, by constructing the base 45 to be permeable to air but not to powder, which is subject to a reduced pressure at 47, so that the powder is maintained stable. In the arrangement of Fig. 11, the powder is added to shape the filter device, by means of a powder jet 53, which is raster scanned across the tray 35 in synchronism with scanning of the image plane by a television camera 56 coupled to an image intensifier, the intensity of the powder jet being modulated to give the required filter thickness at different areas. To effect the scanning of the powder jet, it is passed through two pairs of electrostatic plates (62, 63), Fig. 12 (not shown). The intensity of the jet is modulated by a further pair of plates which direct powder out of the main beam as necessary. Alternatively, the sweep velocity of the scan may be varied. After an exposure has been made using the powder type of filter device, a flat layer is reproduced by reinstatement of removed material or smoothing out of the surface. The degree of equalization of the exposure may be varied, e.g. by feedback loop 45 in Fig. 2, or by using different X-ray energies during setting up of the filter and subsequent radiographic exposure. A discusion of the use of media in respect of their absorbtion edges is given and the use of rare earth metals suggested.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE16209/70A SE347859B (en) | 1970-11-30 | 1970-11-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1374610A true GB1374610A (en) | 1974-11-20 |
Family
ID=20301887
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5540471A Expired GB1374610A (en) | 1970-11-30 | 1971-11-29 | Radiographic apparatus |
Country Status (7)
Country | Link |
---|---|
US (1) | US3755672A (en) |
DE (1) | DE2159365A1 (en) |
FR (1) | FR2116168A5 (en) |
GB (1) | GB1374610A (en) |
IT (1) | IT945161B (en) |
NL (1) | NL7116455A (en) |
SE (1) | SE347859B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0417964A2 (en) * | 1989-09-06 | 1991-03-20 | General Electric Company | A scanning mammography system |
US5267295A (en) * | 1989-11-23 | 1993-11-30 | Planmed Oy | Methods and device related to automatic exposure in X-ray diagnostics in particular in mammography |
WO2007110796A3 (en) * | 2006-03-29 | 2008-01-24 | Philips Intellectual Property | Dynamic optimization of the signal-to-noise ratio of dual-energy attenuation data for reconstructing images |
Families Citing this family (88)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3882314A (en) * | 1973-02-09 | 1975-05-06 | Siemens Ag | Device for X-ray treatment |
GB1475492A (en) * | 1973-06-01 | 1977-06-01 | Emi Ltd | Apparatus for examining objects by means of penetrating radiation |
US4069422A (en) * | 1973-06-01 | 1978-01-17 | E M I Limited | Apparatus for examining objects by means of penetrating radiation |
US3848130A (en) * | 1973-06-25 | 1974-11-12 | A Macovski | Selective material x-ray imaging system |
US3999073A (en) * | 1973-12-13 | 1976-12-21 | Emi Limited | Apparatus for examining a body by means of penetrating radiation |
US4002911A (en) * | 1974-05-20 | 1977-01-11 | Emi Limited | Data acquisition in tomography |
GB1462518A (en) * | 1974-11-05 | 1977-01-26 | Flocee R | Restriction of fields of radiation |
US3965358A (en) * | 1974-12-06 | 1976-06-22 | Albert Macovski | Cross-sectional imaging system using a polychromatic x-ray source |
US4123657A (en) * | 1975-11-28 | 1978-10-31 | Artronix Inc. | X-ray detector |
EP0001393A3 (en) * | 1977-08-25 | 1979-12-12 | Charles R. Henry | A system for the distribution, transmission, detection, collection or modulation of propagating energy and/or energy fields |
US4136388A (en) * | 1977-08-26 | 1979-01-23 | U.S. Philips Corporation | Data acquisition system for computed tomography |
US4181858A (en) * | 1977-12-30 | 1980-01-01 | Emi Limited | Adjustable compensating device for radiographic apparatus |
US4288695A (en) * | 1979-04-13 | 1981-09-08 | Technicare Corporation | Computerized tomographic scanner with shaped radiation filter |
DE3011912A1 (en) * | 1980-03-27 | 1981-10-01 | Siemens AG, 1000 Berlin und 8000 München | X-RAY DIAGNOSTIC SYSTEM WITH A CONTROL CIRCUIT FOR DOSING PERFORMANCE |
FR2485790A1 (en) * | 1980-06-24 | 1981-12-31 | Radiologie Cie Gle | Prim. filter for radiology - where geometric profile of filter can be modulated by remote control to alter contrast of image on viewing screen |
JPS5753677A (en) * | 1980-09-18 | 1982-03-30 | Toshiba Corp | Radiant ray detector |
US4481419A (en) * | 1981-10-29 | 1984-11-06 | Siemens Gammasonics, Inc. | Attenuation zone plate |
GB2129721B (en) * | 1982-10-04 | 1985-12-24 | Varian Associates | Apparatus for producing tissue compensating filter for use in radiation therapy |
FI68515C (en) * | 1983-01-07 | 1991-05-14 | Instrumentarium Oy | Soft tissue filter arrangement |
JPS59221643A (en) * | 1983-05-31 | 1984-12-13 | Toshiba Corp | Inspecting method of ceramic product |
US4497062A (en) * | 1983-06-06 | 1985-01-29 | Wisconsin Alumni Research Foundation | Digitally controlled X-ray beam attenuation method and apparatus |
NL8400845A (en) * | 1984-03-16 | 1985-10-16 | Optische Ind De Oude Delft Nv | DEVICE FOR GAP RADIOGRAPHY. |
FR2561516B1 (en) * | 1984-03-20 | 1988-03-04 | Thomson Cgr | COMPENSATOR FILTER RADIOLOGY SYSTEM |
NL8401411A (en) | 1984-05-03 | 1985-12-02 | Optische Ind De Oude Delft Nv | DEVICE FOR GAP RADIOGRAPHY. |
DE3500812A1 (en) * | 1985-01-11 | 1986-07-17 | Siemens AG, 1000 Berlin und 8000 München | X-RAY DIAGNOSTIC DEVICE WITH SEMI-TRANSPARENT PANEL |
US4701942A (en) * | 1985-06-10 | 1987-10-20 | American Technologies, Inc. | Ink jet fluid for radiology |
NL8501795A (en) * | 1985-06-21 | 1987-01-16 | Optische Ind De Oude Delft Nv | APPARATUS AND METHOD FOR SLITTLE RADIOGRAPHY WITH DIFFERENT VENT RADIATION ENERGIES. |
US4638502A (en) * | 1985-07-08 | 1987-01-20 | The Ontario Cancer Institute | Anthropomorphic phantoms |
US4672648A (en) * | 1985-10-25 | 1987-06-09 | Picker International, Inc. | Apparatus and method for radiation attenuation |
US4905268A (en) * | 1985-10-25 | 1990-02-27 | Picker International, Inc. | Adjustable off-focal aperture for x-ray tubes |
CA1244971A (en) * | 1985-11-14 | 1988-11-15 | Shih-Ping Wang | X-ray radiography method and system |
US4737647A (en) * | 1986-03-31 | 1988-04-12 | Siemens Medical Laboratories, Inc. | Target assembly for an electron linear accelerator |
US4972458A (en) * | 1986-04-14 | 1990-11-20 | The University Of Rochester | Scanning equalization radiography |
US4791300A (en) * | 1986-08-25 | 1988-12-13 | Qtr Corporation | Miniature gamma camera |
US4868843A (en) * | 1986-09-10 | 1989-09-19 | Varian Associates, Inc. | Multileaf collimator and compensator for radiotherapy machines |
US4868857A (en) * | 1987-10-30 | 1989-09-19 | Duke University | Variable compensation method and apparatus for radiological images |
US5081659A (en) * | 1987-10-30 | 1992-01-14 | Duke University | Variable compensation method and apparatus for radiological images |
US5132996A (en) * | 1988-10-28 | 1992-07-21 | Kermath Manufacturing Company | X-ray imaging system with a sweeping linear detector |
US5014290A (en) * | 1988-10-28 | 1991-05-07 | Moore Robert M | Method and apparatus for generating radiation blockers |
FR2654917A1 (en) * | 1989-11-24 | 1991-05-31 | Gen Electric Cgr | RADIOLOGY APPARATUS WITH HOMOGENIZATION FILTER. |
US5037374A (en) * | 1989-11-29 | 1991-08-06 | Carol Mark P | Stereotactic-guided radiation therapy system with variable-length compensating collimator |
US4975933A (en) * | 1990-03-26 | 1990-12-04 | General Electric Company | Bow-tie X-ray filter assembly for dual energy tomography |
NL9000896A (en) * | 1990-04-17 | 1991-11-18 | Philips Nv | ROENTGEN RADIATION ABSORBENT FILTER. |
FR2664708B1 (en) * | 1990-07-10 | 1992-09-25 | Gen Electric Cgr | METHOD FOR CORRECTING THE HARDENING OF AN X-RAY BEAM IN A SCANNER. |
NL9100019A (en) * | 1991-01-09 | 1992-08-03 | Philips Nv | ROENTGEN RESEARCH DEVICE. |
JP3419821B2 (en) * | 1992-05-26 | 2003-06-23 | 山之内製薬株式会社 | K filter for continuous high-speed rotation image capture, continuous high-speed rotation image capture device, continuous high-speed rotation image capture method, and continuous high-speed rotation image capture / observation device |
FI103176B1 (en) * | 1993-06-15 | 1999-05-14 | Planmeca Oy | Soft tissue filter device for kephalostat |
EP0717875B1 (en) * | 1994-06-30 | 1998-10-14 | Koninklijke Philips Electronics N.V. | X-ray examination apparatus comprising a filter |
EP0740839B1 (en) * | 1994-10-25 | 1998-09-23 | Koninklijke Philips Electronics N.V. | X-ray apparatus comprising a filter |
US5778046A (en) * | 1996-01-19 | 1998-07-07 | The Regents Of The University Of California | Automatic X-ray Beam Equalizer |
JP3839059B2 (en) * | 1996-02-14 | 2006-11-01 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴイ | X-ray inspection apparatus having an X-ray filter |
WO1997038329A1 (en) * | 1996-04-10 | 1997-10-16 | Xitec, Inc. | Optical imaging system |
DE19638621C1 (en) * | 1996-09-20 | 1998-02-05 | Siemens Ag | Radiological emission filter has two chambers separated by membrane |
US5878111A (en) * | 1996-09-20 | 1999-03-02 | Siemens Aktiengesellschaft | X-ray absorption filter having a field generating matrix and field sensitive liquids |
IT1286819B1 (en) * | 1996-12-11 | 1998-07-17 | Gd Spa | METHOD OF MEASURING THE INTENSITY OF RADIATION TRANSMITTED THROUGH A BODY |
US6201852B1 (en) | 1997-04-11 | 2001-03-13 | University Of Medicine & Denistry Of New Jersey | Method and means for variably attenuating radiation |
US6108403A (en) * | 1998-04-21 | 2000-08-22 | Picker International, Inc. | X-ray equalization filter |
US6823044B2 (en) * | 2001-11-21 | 2004-11-23 | Agilent Technologies, Inc. | System for collecting multiple x-ray image exposures of a sample using a sparse configuration |
US6836535B2 (en) * | 2002-04-22 | 2004-12-28 | General Electric Company | Method and apparatus of modulating the filtering of radiation during radiographic imaging |
US20040015073A1 (en) * | 2002-04-26 | 2004-01-22 | Michael Schell | Target repositioning error correction filter and method |
DE10222397A1 (en) * | 2002-05-21 | 2003-12-04 | Siemens Ag | Method for controlling the aperture of a computer tomograph and computer tomograph |
US6920203B2 (en) * | 2002-12-02 | 2005-07-19 | General Electric Company | Method and apparatus for selectively attenuating a radiation source |
US6919572B2 (en) * | 2003-05-02 | 2005-07-19 | The Titan Corporation | Compensating for variations in article speeds and characteristics at different article positions during article irradiation |
US7068750B2 (en) * | 2003-10-27 | 2006-06-27 | General Electric Company | System and method of x-ray flux management control |
US7076029B2 (en) * | 2003-10-27 | 2006-07-11 | General Electric Company | Method and apparatus of radiographic imaging with an energy beam tailored for a subject to be scanned |
US7272208B2 (en) * | 2004-09-21 | 2007-09-18 | Ge Medical Systems Global Technology Company, Llc | System and method for an adaptive morphology x-ray beam in an x-ray system |
WO2006080144A1 (en) * | 2005-01-27 | 2006-08-03 | Hitachi Medical Corporation | X-ray measuring instrument |
US7397904B2 (en) * | 2005-05-11 | 2008-07-08 | Varian Medical Systems Technologies, Inc. | Asymmetric flattening filter for x-ray device |
US7391843B2 (en) * | 2005-06-20 | 2008-06-24 | General Electric Company | Systems and methods for adjusting noise in a medical imaging system |
JP5011482B2 (en) * | 2005-07-19 | 2012-08-29 | ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー | X-ray CT system |
US7308073B2 (en) * | 2005-10-20 | 2007-12-11 | General Electric Company | X-ray filter having dynamically displaceable x-ray attenuating fluid |
US7489764B2 (en) * | 2007-07-02 | 2009-02-10 | Moshe Ein-Gal | Adjustable aperture collimator |
US8208601B2 (en) * | 2008-08-13 | 2012-06-26 | Oncology Tech Llc | Integrated shaping and sculpting unit for use with intensity modulated radiation therapy (IMRT) treatment |
JP4847568B2 (en) * | 2008-10-24 | 2011-12-28 | キヤノン株式会社 | X-ray imaging apparatus and X-ray imaging method |
DE102009012631B4 (en) * | 2009-03-11 | 2011-07-28 | Bayer Schering Pharma Aktiengesellschaft, 13353 | Filter for a computer tomograph and computer tomograph |
WO2011060141A1 (en) * | 2009-11-12 | 2011-05-19 | Oncology Tech Llc | An integrated beam modifying assembly for use with a proton beam therapy machine |
FR2960642B1 (en) | 2010-05-28 | 2012-07-13 | Snecma | NON-DESTRUCTIVE CONTROL METHOD AND DEVICE FOR IMPLEMENTING THE METHOD |
US9044187B2 (en) * | 2010-12-09 | 2015-06-02 | Koninklijke Philips N.V. | Post-patient dynamic filter for computed tomography (CT) |
RU2014102766A (en) | 2011-06-30 | 2015-08-10 | Конинклейке Филипс Н.В. | X-RAY BEAM TRANSFER PROFILE |
DE102012220750B4 (en) | 2012-02-08 | 2015-06-03 | Siemens Aktiengesellschaft | Contour collimator with a magnetic, X-ray absorbing liquid and associated method |
DE102012201856B4 (en) | 2012-02-08 | 2015-04-02 | Siemens Aktiengesellschaft | Contour collimator and adaptive filter with electroactive polymer elements and associated method |
DE102012206953B3 (en) * | 2012-04-26 | 2013-05-23 | Siemens Aktiengesellschaft | Adaptive X-ray filter for varying intensity of local x-ray used for examining organs, has position elements to displace liquid partly and caps that are connected together in the shape of honeycomb proximate to position elements |
DE102012207627B3 (en) * | 2012-05-08 | 2013-05-02 | Siemens Aktiengesellschaft | Adaptive X-ray filter for changing local intensity of X-ray radiation subjected to patient, has heating device that is located to heat X-ray radiation-absorbing liquid |
DE102012209150B3 (en) | 2012-05-31 | 2013-04-11 | Siemens Aktiengesellschaft | Adaptive X-ray filter for altering local intensity of X-ray radiation applied to patient, has electrically deformable position element to change layer thickness of X-ray radiation absorbing liquid by displacing absorbing liquid |
US9173621B2 (en) * | 2013-04-02 | 2015-11-03 | Triple Ring Technologies, Inc. | Method and apparatus for adaptive X-ray filtration |
WO2018046377A1 (en) * | 2016-09-08 | 2018-03-15 | Koninklijke Philips N.V. | Source grating for x-ray imaging |
JP2020533059A (en) * | 2017-09-08 | 2020-11-19 | コーニンクレッカ フィリップス エヌ ヴェKoninklijke Philips N.V. | Dynamic bowtie filter and how to use it |
EP3712902B1 (en) | 2019-03-18 | 2021-05-26 | Siemens Healthcare GmbH | Filter system for local attenuation of x-rays, x-ray apparatus and method for locally modifying the intensity of x-ray radiation |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR816845A (en) * | 1936-01-27 | 1937-08-18 | Device for protecting the patient against injuries caused by chi rays | |
DE1145277B (en) * | 1960-05-27 | 1963-03-14 | Koch & Sterzel Kommanditgesell | X-ray apparatus with automatic exposure device used as a dose rate meter |
-
1970
- 1970-11-30 SE SE16209/70A patent/SE347859B/xx unknown
-
1971
- 1971-11-24 US US00201676A patent/US3755672A/en not_active Expired - Lifetime
- 1971-11-25 IT IT54359/71A patent/IT945161B/en active
- 1971-11-29 GB GB5540471A patent/GB1374610A/en not_active Expired
- 1971-11-30 FR FR7142828A patent/FR2116168A5/fr not_active Expired
- 1971-11-30 DE DE19712159365 patent/DE2159365A1/en active Pending
- 1971-11-30 NL NL7116455A patent/NL7116455A/xx unknown
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0417964A2 (en) * | 1989-09-06 | 1991-03-20 | General Electric Company | A scanning mammography system |
EP0417964A3 (en) * | 1989-09-06 | 1991-04-10 | General Electric Company | A scanning mammography system |
US5164976A (en) * | 1989-09-06 | 1992-11-17 | General Electric Company | Scanning mammography system with improved skin line viewing |
US5267295A (en) * | 1989-11-23 | 1993-11-30 | Planmed Oy | Methods and device related to automatic exposure in X-ray diagnostics in particular in mammography |
WO2007110796A3 (en) * | 2006-03-29 | 2008-01-24 | Philips Intellectual Property | Dynamic optimization of the signal-to-noise ratio of dual-energy attenuation data for reconstructing images |
US8155422B2 (en) | 2006-03-29 | 2012-04-10 | Koninklijke Philips Electronics N.V. | Dynamic optimization of the signal-to-noise ratio of dual-energy attenuation data for reconstructing images |
Also Published As
Publication number | Publication date |
---|---|
NL7116455A (en) | 1972-06-01 |
US3755672A (en) | 1973-08-28 |
FR2116168A5 (en) | 1972-07-07 |
SE347859B (en) | 1972-08-14 |
DE2159365A1 (en) | 1972-07-13 |
IT945161B (en) | 1973-05-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1374610A (en) | Radiographic apparatus | |
US4651002A (en) | Radiographic method and apparatus for reducing the effects of scatter in the image | |
US4323779A (en) | Scanning radiographic method | |
JPS60501492A (en) | Digitally controlled X-ray beam attenuation method and device | |
ATE207285T1 (en) | SELF-CALIBRATED TOMOSYNTHETIC RADIOGRAPHIC IMAGING SYSTEM, METHOD AND APPARATUS | |
GB1572347A (en) | Radiographic apparatus | |
JPS62290443A (en) | Apparatus and method for calculating two kinds of energy difference images by dynamic and static charge detector | |
EP0223432A2 (en) | X-ray radiography system | |
US5162919A (en) | Light beam scanning apparatus using sequentially activated shutters and light sources | |
US4173720A (en) | Method and apparatus for image construction | |
US4550419A (en) | Diagnostic radiology setup with means for suppressing stray radiation | |
US3963924A (en) | Method and apparatus for taking x-ray pictures | |
JPH06100657B2 (en) | X-ray equipment | |
JPH0678216A (en) | Device and method for photographing radiograph | |
US4020347A (en) | Mammography | |
EP0137465A3 (en) | Film-based dual energy radiography | |
JPS59102227A (en) | High speed photographing base using accumulative fluorescent body sheet | |
GB1225033A (en) | X-ray diagnostic apparatus for urological examinations | |
JPH02280099A (en) | Accumulation type fluorescent material sheet and energy subtraction method | |
EP0046609B1 (en) | Radiography apparatus with a fan-shaped beam | |
US3422264A (en) | Device for producing stereoscopic radiographs | |
GB1169787A (en) | Tomographic Apparatus | |
JPS6292663A (en) | Radiographic image information reader | |
DE3370758D1 (en) | Device for forming x-ray images of bodies | |
JP2772667B2 (en) | Radiation dose adjusting device in radiation imaging device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PLNP | Patent lapsed through nonpayment of renewal fees |