US2667585A - Device for producing screening images of body sections - Google Patents

Device for producing screening images of body sections Download PDF

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Publication number
US2667585A
US2667585A US266373A US26637352A US2667585A US 2667585 A US2667585 A US 2667585A US 266373 A US266373 A US 266373A US 26637352 A US26637352 A US 26637352A US 2667585 A US2667585 A US 2667585A
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US
United States
Prior art keywords
image
electron
deflection
source
ray tube
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 - Lifetime
Application number
US266373A
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English (en)
Inventor
Gradstein Stephan
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.)
Hartford National Bank and Trust Co
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Hartford National Bank and Trust Co
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Publication date
Application filed by Hartford National Bank and Trust Co filed Critical Hartford National Bank and Trust Co
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Publication of US2667585A publication Critical patent/US2667585A/en
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    • 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
    • A61B6/42—Arrangements for detecting radiation specially adapted for radiation diagnosis
    • A61B6/4208—Arrangements for detecting radiation specially adapted for radiation diagnosis characterised by using a particular type of detector
    • A61B6/4225—Arrangements for detecting radiation specially adapted for radiation diagnosis characterised by using a particular type of detector using image intensifiers
    • 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
    • A61B6/4021—Arrangements for generating radiation specially adapted for radiation diagnosis involving movement of the focal spot
    • A61B6/4028—Arrangements for generating radiation specially adapted for radiation diagnosis involving movement of the focal spot resulting in acquisition of views from substantially different positions, e.g. EBCT
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/50—Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output
    • H01J31/503—Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output with an electromagnetic electron-optic system

Definitions

  • x-ray images having an extremely small depth of sharpness may be obtained by particular technical measures.
  • X-ray apparatus suitable for this purpose is distinguished from apparatus for producing the conventional X-ray images in that the source of rays is displaced during the production or the radiograph, for example, in a path lying in a fiat plane at right angles to the section to be reproduced.
  • the image carrier which is parallel to the section to be reproduced, is moved in an opposite sense in a manner such that an X-ray passing through a particular point of the section to be reproduced during the operation invariably strikes the same point of the image carrier.
  • a device of this kind is furthermore used for screening.
  • the image carrier is constituted by a fluorescent screen and with the use of an optical system comprising a mirror or one or more lenses and moved in a suitable manner, the optical image may be caused to move in a sense opposite to the image of the moving image carrier, so that this image seems to be stationary.
  • a device according to the invention also serves to produce X-ray images of thin sectional portions with the use of a moving X-ray source. It may be used both vfor medical examination and for the examination of materials.
  • the image carrier collecting the X-rays is not moved, but it 00- operates with an electron-optical reproducing device comprising means to convert the moving image into a directly visible image which is stationary to the operators eye.
  • photo-cathode being arranged in optical contact with this image layer.
  • the means used in accordance with the invention to convert the moving image projected onto the image carrier into a stationary image are constituted by eleotro-static or magnetic fields, which are arranged transversely to the direction of the electron rays from the photo-cathode. They serve to deflect the electron paths extending between the photo-electric cathode and the collecting screen.
  • the electro-static deflection fields may be produced with the use of one or more pairs of parallel plates, between which a voltage is maintained. The plates of each pair are arranged each on one side of the electron paths.
  • Rnthe magnetic fields use may be made of mag- I X-rays.
  • the deflection of the bunch of electron paths may be varied in accordance with the displacement of the X-ray image by varying the voltage between the plates or the energising current of the coils.
  • a very suitable embodiment of the invention is obtained with the use of an X-ray tube having a moving focal spot.
  • An X-ray tube is known, in which the focal spot is moved across the anode surface by deflecting the electron beam producing the X-rays with the use of electrostatic or magnetic fields.
  • the control-members By coupling the control-members with the use of which the strength of these deflection fields is varied with the members for controlling the strength of the deflection fields in the X-ray image amplifier, an accurate agreement between the displacement of the focal spot in the X-ray tube and that of the amplified X-ray image may be obtained.
  • the displacement may be performed at high speed, since mass forces need not be overcome as is the case with apparatus comprising mechanically actuated parts.
  • Fig. 1 shows diagrammatically an arrangement of the principal parts of a device according to the invention, comprising a moving X-ray tube and Fig. 2 shows a similar device comprising an X- ray tube having a movable focal spot.
  • a shadow image of part of the object 3 is produced on the image layer l, which is arranged on the fiat bottom 5, which closes one end of the cylindrical glass tube 6.
  • the other end of the glass tube is closed by a fiat wall 1.
  • This wall is provided with a fluorescent screen 8.
  • the image layer 4 is made of a material which radiates luminescent light, when it is struck by On the image layer 4 a photo-electric cathode 9 is arranged. It is made of a material which emits electrons under the action of the light produced in the image layer 4. It is known that an image corresponding with that of the photo-cathode can be reproduced on the fluorescent screen 8. Use may be made in this case of an electric acceleration held and of an electronoptical lens.
  • the magnet coil 10 serves to produce the lens field.
  • the acceleration field is obtained by providing a conductive coating H on the inner wall of the tube 6, extending as far as the proximity of the photo-electric cathode and by applying an electric voltage to the photo-cathode.
  • the fluorescent screen 8 is preferably arranged on a thin, transparent conductive layer, which is electrically connected to the conductive coating II.
  • An image of the section I2 of the object 3 is obtained during the operation by moving the X-ray tube I between the two extreme positions a and 1), indicated in Fig. l by broken lines.
  • the focal spot of the tube I need not perform a rectilinear movement; it may, for example, describe a circular or a helical path in a plane parallel to the plane I2 of the section.
  • the X-ray tube I taking up the neutral position, an image I5 of the arrow I4 is projected onto the image layer 4, this image I 5 being transmitted with the use of the photo-cathode 9 by electron-optical projection to the fluorescent screen 8 and being indicated by the arrow I6.
  • the electrons from the photocathode travel along paths which strike the screen at points, whose distance from the tube axis is proportional to that of the initial points.
  • the X-ray tube I takes up the position a the image of the arrow I4 has shifted upwards.
  • this image must be caused to coincide with the image I6.
  • This may be effected by energising the deflection coils I3 in a manner such that under the action of the magnetic field produced the electron paths are deflected through the correct angle.
  • the strength of the deflection field must now be continuously varied during the displacement of the X-ray tube.
  • a control-device for the coil current may be coupled with the movement of the X-ray tube and thus the current variation across the coils I 3 may be derived from the movement of the X-ray tube.
  • the deflection coils I3 Upon movement of the X-ray tube I into the position b, the deflection coils I3 must be energised in opposite sense. Parts of the object located in front of the section indicated by the arrow I4 or behind it are not reproduced sharply,'but, if the X-ray tube is displaced with sufficient speed, they form a vague background, against which the image of the section to be reproduced is sharply outlined.
  • the X-day tube is moved very rapidly in order to make the background of the image sufiiciently indistinct and therefore it will be preferable to move the X-ray tube along a circular closed path.
  • a second set of deflection coils is arranged in the image amplifier the axis of the field of these coils being at an angle of with respect to the axis of the field, which is produced by the first coils.
  • a further embodiment of the device according to the invention which is shown in Fig. 2
  • greater profit is derived from the advantage that the image layer does not move and that no mass forces occur when the fluorescent screen image obtained by electron-optical means is immobilised.
  • Use is made of an X-ray tube I! having a focal spot moving across the anode. The movement of the focal spot is produced by deflecting the electron beam which produces the X-rays. In this case the X-ray tube need not be displaced.
  • the X-ray tube II comprises a glass tube I9, which is provided with a limb 20.
  • the electrode system for producing a directional electron beam comprising a cathode 2
  • a great potential difference is applied between the accelerating electrode 23 and the anode I8 arranged in the wide portion of the tube.
  • a stay member 24, which is secured to the tube wall, serves to secure the anode I8.
  • the X-ray tube is arranged in a manner such that the surface struck by the electrons is parallel to the section 26 to be reproduced, indicated by a broken line.
  • the image amplifier 21 is arranged, which may be constructed in accordance with the device described above.
  • Fig. 2 shows a device having electrostatic focusing of the electron rays.
  • the electrons from the photocathode 28, which is combined with the image layer for collecting X-rays, travel through a'small aperture 30 in the anode 29 to the fluorescent screen 3I.
  • the anode tube comprises the pair of deflection plates 32.
  • an image of the wanted section 26 may be selected by applying a suitable alternating potential difference to the plates 32.
  • the required deflection voltages are-derived from a potentiometer 33, which is connected to a voltage source 34. The latter is provided with terminals 35for theconnection to thesupply
  • the voltage source 84 is constituted by a transformer for converting the mains voltage into a value required for the deflection.
  • the centre 36 of the potentiometer 33 is electrically connected to the cathode 22 of the X-ray tube I1 and to the anode 29 oi the image amplifier 21.
  • the plates 32 are electrically connected to the adjusting members 31 and the deflection plate 25 are connected to the adjusting members 38 of the potentiometer, so that the deflection fields in the X-ray tube and the image amplifier are coupled and at the some time an accurate adjustment of the two field strengths is permitted.
  • a device for producing images of a thin section of a stationary object comprising a source of X-radiation disposed on one side of said object, means for moving said source along a path lying in a fiat plane, a stationary image carrier disposed on the other side of said object for receiving the X-radiation after it has passed through said object, said image carrier comprising a photo-cathode for converting the X-ray image produced when the X-radiation traverses said object into an electron image, a fluorescent screen for converting the electron image into a visible image, and electron-optical means for deflecting the electrons produced by the photo-cathode in accordance with the position of said source to produce on the fluorescent screen a fixed corresponding image of the thin section as the source of X-radiation moves relative thereto.
  • a device for producing images of a thin section of a stationary object comprising a source of Xradiation disposed on one side of said object, means for moving said source along a path lying in a flat plane, a stationary image carrier disposed on the other side of said object for receiving the X-radiation after it has passed through said object, said image carrier comprising a photo-cathode for converting the X ray image produced when the X-radiation traverses said object into an electron image, a fluorescent screen for converting the electron image into a visible image, electron-optical means for deflecting the electrons produced by the photo-cathode, and
  • a device for producing images of a thin section of a stationary object comprising a source of X-radiation disposed on one side of said object, means for moving said source alon a linear path lying in a flat plane, a stationary image carrier disposed on the other side of said object for receiving the X-radiation after it has passed through said object, said image carrier comprising a photo-cathode for converting the X-ray image produced when the X-radiation traverses said object into an electron image, a fluorescent screen for converting the electron image into a visible image, electron-optical means for deflecting the electrons produced by the photo-cathode, said electron-optical means including a pair of coils disposed on opposite sides 01.
  • a device for producing images or a thin section of a stationary object comprising a source of X-radiation disposed on one side of said object, means for moving said source along a circular path lying in a flat plane, a stationary image carrier disposed on the other side of said object for receiving the X-radiation after it has passed through said object, said image carrier comprising a photo-cathode for converting the X-ray image produced when the X-radiation traverses said object into an electron image, a fluorescent screen for converting the electron image into a visible image, electron-optical means for deflecting the electrons produced by the photo-cathode, said electron optical means including a pair of coils disposed on opposite sides of the path of the electrons and producing a magnetic deflection field transverse thereto and a second pair of coils at right angles to the first pair for producing a second transverse deflection field, and means coupled to the means for moving the source for varyin the extent of the transverse deflection fields in accordance with the position of
  • a device for producing images of a thin section of a stationary object comprising in combination; an X-ray tube including an anode having a large surface disposed on one side of said object, means for producing an electron beam within said tube, and deflection means wltnin said tube for deflecting the electron beam onto different areas of the anode to produce a variably-positioned source of X-radiation therefrom, said areas lying along a path in a flat plane; a stationary image carrier disposed on the other side of said object for receiving the X-radiation after it has passed through said object, said image carrier comprising a photo-cathode for converting the X-ray image produced when the X-radiation traverses said object into an elec tron image, a fluorescent screen for converting the electron image into a visible image, electronoptical means for deflecting the electrons produced by the photo-cathode; a source of variable potential; means for connecting said source of variable potential to said deflection means within said X-ray tube where
  • a device for producing images of a thin section of a stationary object comprising in combinatlon; an X-ray tube including an anode having a large surface disposed on one side of said object, means for producing an electron beam within said tube, and deflection means within said tube for deflecting the electron beam onto different areas of the anode to produce a variably-positioned source of X-radiation therefrom, said areas lying along a path in a flat plane; a stationary image carrier disposed on the other side of said object for receiving the X-radiation after it has passed through said object, said image carrier comprising a photo-cathode for converting the X-ray image produced when the X-radiation traverses said object into an electron image, a fluorescent screen for converting the electron image into a visible image, electron-optical means for deflecting the electrons produced by the photo-cathode; said electron-optical means including a pair of deflection plates disposed on opposite sides of the path of the electrons for producing a

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Medical Informatics (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Pathology (AREA)
  • Public Health (AREA)
  • Biophysics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Optics & Photonics (AREA)
  • Veterinary Medicine (AREA)
  • Radiology & Medical Imaging (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Electromagnetism (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
  • X-Ray Techniques (AREA)
US266373A 1951-02-15 1952-01-14 Device for producing screening images of body sections Expired - Lifetime US2667585A (en)

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Application Number Priority Date Filing Date Title
NL298667X 1951-02-15

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US2667585A true US2667585A (en) 1954-01-26

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US (1) US2667585A (de)
CH (1) CH298667A (de)
DE (1) DE940775C (de)
FR (1) FR1050819A (de)
GB (1) GB704586A (de)

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2748304A (en) * 1950-03-27 1956-05-29 Hartford Nat Bank & Trust Co Electric discharge tube for intensifying fluorescent images produced with the use ofchi-rays
US2998518A (en) * 1956-05-09 1961-08-29 Optische Ind De Oude Delft Nv Tomoscope
US3002101A (en) * 1954-03-17 1961-09-26 Westinghouse Electric Corp Image amplifier
US3091692A (en) * 1953-11-14 1963-05-28 Philips Corp Apparatus for tomographic fluoroscopy with the use of image amplification
US3432658A (en) * 1966-05-26 1969-03-11 Gen Electric Stereoscopic x-ray apparatus employing image converting and polarizing means
US3497700A (en) * 1965-11-19 1970-02-24 Itek Corp Method of analyzing vibrations of a vibrating object
US3809900A (en) * 1972-08-08 1974-05-07 Collmann Gmbh & Co Apparatus for the continuous, overall x-ray examination of a motor vehicle tire
US4002917A (en) * 1974-08-28 1977-01-11 Emi Limited Sources of X-radiation
US4007376A (en) * 1975-08-07 1977-02-08 Samuel Morton Zimmerman Video x-ray imaging system and method
US4144457A (en) * 1976-04-05 1979-03-13 Albert Richard D Tomographic X-ray scanning system
US4234794A (en) * 1977-12-22 1980-11-18 Statia De Verificare Si Intretinere A Aparaturii Medicale Installation of radiodiagnosis with sweep
US4282438A (en) * 1977-02-14 1981-08-04 Tokyo Shibaura Electric Co., Ltd. Computed tomography apparatus and method using penetrating radiation
US4340816A (en) * 1976-10-19 1982-07-20 Siemens Aktiengesellschaft Method of producing tomograms with x-rays or similarly penetrating radiation
US4349740A (en) * 1976-12-23 1982-09-14 Siemens Aktiengesellschaft Apparatus for displaying fluoroscopic tomographic images of the body
US4718075A (en) * 1986-03-28 1988-01-05 Grumman Aerospace Corporation Raster scan anode X-ray tube
WO1989004477A1 (en) * 1987-10-30 1989-05-18 Four Pi Systems Corporation Automated laminography system for inspection of electronics
US5081656A (en) * 1987-10-30 1992-01-14 Four Pi Systems Corporation Automated laminography system for inspection of electronics
US5097492A (en) * 1987-10-30 1992-03-17 Four Pi Systems Corporation Automated laminography system for inspection of electronics
US5259012A (en) * 1990-08-30 1993-11-02 Four Pi Systems Corporation Laminography system and method with electromagnetically directed multipath radiation source
US5561696A (en) * 1987-10-30 1996-10-01 Hewlett-Packard Company Method and apparatus for inspecting electrical connections
US5583904A (en) * 1995-04-11 1996-12-10 Hewlett-Packard Co. Continuous linear scan laminography system and method
US5621811A (en) * 1987-10-30 1997-04-15 Hewlett-Packard Co. Learning method and apparatus for detecting and controlling solder defects
US5644612A (en) * 1993-01-25 1997-07-01 Cardiac Mariners, Inc. Image reconstruction methods
US5682412A (en) * 1993-04-05 1997-10-28 Cardiac Mariners, Incorporated X-ray source
US5687209A (en) * 1995-04-11 1997-11-11 Hewlett-Packard Co. Automatic warp compensation for laminographic circuit board inspection
US6060713A (en) * 1993-04-05 2000-05-09 Cardiac Mariners Inc X-ray detector
US6183139B1 (en) 1998-10-06 2001-02-06 Cardiac Mariners, Inc. X-ray scanning method and apparatus
US6208709B1 (en) 1998-10-06 2001-03-27 Cardiac Mariners, Inc. Detection processing system
EP2269511A4 (de) * 2008-09-18 2012-03-07 Canon Kk Mehrfach-röntgenphotographievorrichtung und steuerverfahren dafür

Citations (5)

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Publication number Priority date Publication date Assignee Title
GB601806A (de) *
US2000497A (en) * 1927-11-29 1935-05-07 Pohl Ernst Method of and apparatus for making rontgen projections
US2048094A (en) * 1932-06-21 1936-07-21 Applebaum David Television receiver
US2153586A (en) * 1934-03-20 1939-04-11 Communications Patents Inc Radiating, transformation and reinforcement system
US2555545A (en) * 1947-08-28 1951-06-05 Westinghouse Electric Corp Image intensifier

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* Cited by examiner, † Cited by third party
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DE726595C (de) * 1935-11-01 1942-10-16 Mueller C H F Ag Verfahren und Einrichtung zur Darstellung von Koerperschnitten mittels Roentgenstrahlen
AT152528B (de) * 1936-06-08 1938-02-25 Telefunken Gmbh Anordnung zur Übertragung von Filmbildern beim Fernsehen.
FR876016A (fr) * 1940-10-22 1942-10-12 Fernseh Gmbh Procédé d'exploration d'une pellicule utilisant un tube accumulateur d'image

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB601806A (de) *
US2000497A (en) * 1927-11-29 1935-05-07 Pohl Ernst Method of and apparatus for making rontgen projections
US2048094A (en) * 1932-06-21 1936-07-21 Applebaum David Television receiver
US2153586A (en) * 1934-03-20 1939-04-11 Communications Patents Inc Radiating, transformation and reinforcement system
US2555545A (en) * 1947-08-28 1951-06-05 Westinghouse Electric Corp Image intensifier

Cited By (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2748304A (en) * 1950-03-27 1956-05-29 Hartford Nat Bank & Trust Co Electric discharge tube for intensifying fluorescent images produced with the use ofchi-rays
US3091692A (en) * 1953-11-14 1963-05-28 Philips Corp Apparatus for tomographic fluoroscopy with the use of image amplification
US3002101A (en) * 1954-03-17 1961-09-26 Westinghouse Electric Corp Image amplifier
US2998518A (en) * 1956-05-09 1961-08-29 Optische Ind De Oude Delft Nv Tomoscope
US3497700A (en) * 1965-11-19 1970-02-24 Itek Corp Method of analyzing vibrations of a vibrating object
US3432658A (en) * 1966-05-26 1969-03-11 Gen Electric Stereoscopic x-ray apparatus employing image converting and polarizing means
US3809900A (en) * 1972-08-08 1974-05-07 Collmann Gmbh & Co Apparatus for the continuous, overall x-ray examination of a motor vehicle tire
US4002917A (en) * 1974-08-28 1977-01-11 Emi Limited Sources of X-radiation
US4007376A (en) * 1975-08-07 1977-02-08 Samuel Morton Zimmerman Video x-ray imaging system and method
US4144457A (en) * 1976-04-05 1979-03-13 Albert Richard D Tomographic X-ray scanning system
US4340816A (en) * 1976-10-19 1982-07-20 Siemens Aktiengesellschaft Method of producing tomograms with x-rays or similarly penetrating radiation
US4349740A (en) * 1976-12-23 1982-09-14 Siemens Aktiengesellschaft Apparatus for displaying fluoroscopic tomographic images of the body
US4282438A (en) * 1977-02-14 1981-08-04 Tokyo Shibaura Electric Co., Ltd. Computed tomography apparatus and method using penetrating radiation
US4234794A (en) * 1977-12-22 1980-11-18 Statia De Verificare Si Intretinere A Aparaturii Medicale Installation of radiodiagnosis with sweep
US4718075A (en) * 1986-03-28 1988-01-05 Grumman Aerospace Corporation Raster scan anode X-ray tube
US5097492A (en) * 1987-10-30 1992-03-17 Four Pi Systems Corporation Automated laminography system for inspection of electronics
US5621811A (en) * 1987-10-30 1997-04-15 Hewlett-Packard Co. Learning method and apparatus for detecting and controlling solder defects
US5081656A (en) * 1987-10-30 1992-01-14 Four Pi Systems Corporation Automated laminography system for inspection of electronics
WO1989004477A1 (en) * 1987-10-30 1989-05-18 Four Pi Systems Corporation Automated laminography system for inspection of electronics
JPH06100451B2 (ja) * 1987-10-30 1994-12-12 フォー・ピー・アイ・システムズ・コーポレーション エレクトロニクスの検査のための自動ラミノグラフシステム
US5561696A (en) * 1987-10-30 1996-10-01 Hewlett-Packard Company Method and apparatus for inspecting electrical connections
US4926452A (en) * 1987-10-30 1990-05-15 Four Pi Systems Corporation Automated laminography system for inspection of electronics
US5259012A (en) * 1990-08-30 1993-11-02 Four Pi Systems Corporation Laminography system and method with electromagnetically directed multipath radiation source
US5859893A (en) * 1993-01-25 1999-01-12 Cardiac Mariners, Inc. X-ray collimation assembly
US5651047A (en) * 1993-01-25 1997-07-22 Cardiac Mariners, Incorporated Maneuverable and locateable catheters
US5644612A (en) * 1993-01-25 1997-07-01 Cardiac Mariners, Inc. Image reconstruction methods
US5729584A (en) * 1993-01-25 1998-03-17 Cardiac Mariners, Inc. Scanning-beam X-ray imaging system
US5751785A (en) * 1993-01-25 1998-05-12 Cardiac Mariners, Inc. Image reconstruction methods
US5835561A (en) * 1993-01-25 1998-11-10 Cardiac Mariners, Incorporated Scanning beam x-ray imaging system
US6649914B1 (en) 1993-01-25 2003-11-18 Cardiac Mariners, Inc. Scanning-beam X-ray imaging system
US6060713A (en) * 1993-04-05 2000-05-09 Cardiac Mariners Inc X-ray detector
US5682412A (en) * 1993-04-05 1997-10-28 Cardiac Mariners, Incorporated X-ray source
US5687209A (en) * 1995-04-11 1997-11-11 Hewlett-Packard Co. Automatic warp compensation for laminographic circuit board inspection
US5583904A (en) * 1995-04-11 1996-12-10 Hewlett-Packard Co. Continuous linear scan laminography system and method
US6183139B1 (en) 1998-10-06 2001-02-06 Cardiac Mariners, Inc. X-ray scanning method and apparatus
US6208709B1 (en) 1998-10-06 2001-03-27 Cardiac Mariners, Inc. Detection processing system
EP2269511A4 (de) * 2008-09-18 2012-03-07 Canon Kk Mehrfach-röntgenphotographievorrichtung und steuerverfahren dafür
US9008268B2 (en) 2008-09-18 2015-04-14 Canon Kabushiki Kaisha Multi X-ray imaging apparatus and control method therefor

Also Published As

Publication number Publication date
DE940775C (de) 1956-03-29
FR1050819A (fr) 1954-01-11
GB704586A (en) 1954-02-24
CH298667A (de) 1954-05-15

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