US3922552A - Diagnostic X-ray systems - Google Patents

Diagnostic X-ray systems Download PDF

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Publication number
US3922552A
US3922552A US443042A US44304274A US3922552A US 3922552 A US3922552 A US 3922552A US 443042 A US443042 A US 443042A US 44304274 A US44304274 A US 44304274A US 3922552 A US3922552 A US 3922552A
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United States
Prior art keywords
frame
patient
radiation
source
carrier
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US443042A
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English (en)
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Robert S Ledley
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Individual
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Individual
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Priority to US443042A priority Critical patent/US3922552A/en
Priority to CA219,880A priority patent/CA1025131A/en
Priority to JP50017558A priority patent/JPS50122292A/ja
Priority to FR7504729A priority patent/FR2260977B1/fr
Priority to ZA00750949A priority patent/ZA75949B/xx
Priority to IT4817675A priority patent/IT1029734B/it
Priority to GB639575A priority patent/GB1463234A/en
Priority to AU78223/75A priority patent/AU491377B2/en
Priority to DE19752506377 priority patent/DE2506377A1/de
Priority to AT115175A priority patent/AT353899B/de
Priority to US05/628,708 priority patent/US4005311A/en
Application granted granted Critical
Publication of US3922552A publication Critical patent/US3922552A/en
Priority to AU34577/78A priority patent/AU518378B2/en
Priority to JP1980019783U priority patent/JPS5910975Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • A61B6/40—Arrangements for generating radiation specially adapted for radiation diagnosis
    • A61B6/4064—Arrangements for generating radiation specially adapted for radiation diagnosis specially adapted for producing a particular type of beam
    • A61B6/4071—Pencil beams
    • 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
    • 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
    • A61B6/06—Diaphragms
    • 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
    • A61B6/08—Auxiliary means for directing the radiation beam to a particular spot, e.g. using light beams
    • 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
    • A61B6/10—Safety means specially adapted therefor
    • 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
    • A61B6/44—Constructional features of apparatus for radiation diagnosis
    • A61B6/4429—Constructional features of apparatus for radiation diagnosis related to the mounting of source units and detector units
    • A61B6/4435—Constructional features of apparatus for radiation diagnosis related to the mounting of source units and detector units the source unit and the detector unit being coupled by a rigid structure
    • A61B6/4447—Tiltable gantries
    • 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
    • A61B6/50—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications
    • A61B6/501—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications for diagnosis of the head, e.g. neuroimaging or craniography
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
    • G01T1/16—Measuring radiation intensity
    • G01T1/161—Applications in the field of nuclear medicine, e.g. in vivo counting
    • G01T1/164—Scintigraphy

Definitions

  • ABSTRACT A machine for examining the interior of a patient which includes a movable support for the patient, a frame having an opening adapted to circumscribe the patient, a shutter assembly, an X-ray beam source mounted on one side of the opening with a detector unit mounted on the opposite side of the opening such that a beam emitted by the source passes through the patient prior to reception by the detector.
  • the machine includes mechanisms for rotating the framework about the patient while there is a relative translational movement of the Xray source and receptor relative thereto.
  • the apparatus also includes mechanism for tilting the framework such that other-than-vertical planes may be examined.
  • the opening of the machine is sufficiently large to receive a human body and eliminates the requirement of water bags and other such paraphernalia commonly associated with equipment of this type,
  • FIGIIC HGIIB DIAGNOSTIC X-RAY SYSTEMS The concept of utilizing X-ray scanning with thin beams for analysis by computers for storing and reconstructing the results in tangible form is well known. Reference is made to US. Pat. No. 3,106,640 to Oldendorf, US. Pat. No. 3,591,806 to Brill, dated July 6, 1971, US. Pat. No. 3,499,146 to Richards, dated Mar. 3, 1970, and US. Pat. No. 3,778,614 to Hounsfieid, dated Dec. 1 l, 1973. Each of these patents, at least in part, discloses a scanning technique wherein thin tomographic slices or cross-sections of an organ of the human body are analyzed and thereafter presented in a manner which can be interpreted by a physician.
  • Another principal objective of this invention is to provide a tomographic scanner having a capability of scanning any portion of the human body with equal efficiency and accuracy.
  • Another important object of the invention is to provide a medical diagnostic apparatus of the type described in which the plane of the scanner can be titled over a relatively wide range of attitudes.
  • the mechanism of this invention has means to rotate the scanning device while the scanning mechanism can be moved transversely after each partial rotation. This is common in tomographic photography.
  • an important objective of this invention is to provide means wherein the translational scanning has an in creased degree of adjustability. For instance, a 9 inch scan can be used for the head, arm, or leg, while a 15 to 20 inch scan may be necessary for the trunk of the body.
  • the instant machine is readily adjustable for accomplishing either.
  • Another important objective of this invention is to provide an instrument wherein the rotational movement can be adjusted in degree increments from 1 to 6'.
  • this objective of the invention can reduce radiation dose given to a particular patient by perhaps taking a scan at every 6 rather than at each degree.
  • a further objective of the invention is to provide means to adjust the distance between transverse scans as determined by the medical requirements of the particular patient.
  • Another principal objective of this invention is to provide a shutter arrangement.
  • This shutter arrangement obviates the necessity for water bags. This substantially increases the flexibility of use. Water bags, of course, create the possibility of breakage, thereby creating an extremely dangerous condition in view of the high voltage electronic equipment associated with X-ray machines.
  • FIG. I is a diagrammatic perspective view of the invention showing its general arrangement and construc tion;
  • FIG. 2 is a series of diagrams illustrative of the tomographic scanning pattern taken during operation
  • FIG. 3 is an exploded perspective of the major elements of FIG. 1;
  • FIG. 4 is a side elevation
  • FIG. 5 is a plan view
  • FIG. 6 is a rear view
  • FIG. 7 is a sectional view taken along the lines '7-7 of FIG. 6;
  • FIG. 8 is a sectional view taken along the lines 8-8 of FIG. 6;
  • FIG. 9 is a cross-sectional view taken along the lines 99 of FIG. 6;
  • FIG. 10 is an enlarged sectional view of one element of the machine.
  • FIGS. 11a 11c are diagrammatic sketches showing operation of the shutter mechanism.
  • the numeral 10 generally indicates the scanning apparatus of this invention.
  • the apparatus has as its principal supporting mechanism, a framework 12 supported by a ground-engaging supporting base indicated by the numeral 14.
  • the framework 12 In addition to base 14 the framework 12 consists of first and second uprights l5 and 16 having a crossmember 18 extending between their upper ends.
  • a carrier frame 20 is disposed immediately in front of frame 16 and is pivotally mounted at points 21 to base member 14.
  • the particular pivot mounting means is any convenient structure providing it permits carrier frame 20 to tilt at least 10 toward frame 14 and approximately 20 therefrom, The desired extent of tilting is illustrated in dotted lines in FIG. 4.
  • the carrier frame 20 includes a pair of uprights 22 and 24 to which a housing 26 is secured.
  • the housing 26 is provided with an opening 28 sufficiently large to readily accommodate a patient represented by the letter P on the drawings.
  • a drive screw 30 Disposed on the upper surface of cross-beam I8 is a drive screw 30 which is rotated by a motor 32.
  • An unthreaded center of screw 30 is rotatably supported in a block 34 which is affixed to cross-beam 18.
  • the threads on opposite sides of block 14 are formed in opposing directions. This causes blocks 36 and 38 to move in opposite directions toward or away from each other, depending upon the direction of rotation of shaft 30.
  • the blocks 36 and 38 are interconnected to the upper end of frame by a pair of crossed bars 40 and 42 which have first ends, respectively, and rotatably connected to blocks 36 and 38 and their other ends, respectively, and rotatably connected to pins 44 and 46 located at the top of frame 20. Therefore, it can be seen that a rotation of drive shaft will cause the framework 22 to tilt about points 22 as determined by the degree of extension in the scissor-arranged bars and 42.
  • a plurality of circumferentially arranged bearing members 48 which rotatably mount, and position, a ring 50.
  • a plurality of threaded studs 52 Extending forwardly of ring 50 are a plurality of threaded studs 52.
  • the ring 50 also has a flange 54.
  • the flange 54 is formed with gear teeth 55 which mate with a drive gear 56.
  • Gear 56 is rotated by the motor 58.
  • motor 58 is the power source for rotating ring 50.
  • the rotating frame 60 includes a plate 62 having an opening 64 generally coextensive in size and axial placement with the opening 28 as defined more particularly by the inner circumference of ring 50. Disposed about the opening 64 are a series of apertures 66 which receive the aforementioned threaded studs 52. This arrangement causes the frame 60 to rotate with ring 50. Affixed to the upper side of framework 60 is an upper bracket 66 and affixed to the lower side of framework 60 is a lower bracket 68. The brackets 66 and 68 carry counterweight assemblies 70a and 70b therebetween. The lower edges of upper brackets 66 and the upper edges of brackets 68 are formed, respectively, with grooves 72 and 74 to receive a transversely moving frame 80.
  • the lower bracket 68 has transverse supporting rods 76 and 78 which slidably receive the transverse frame 80 via blocks 82 lower 84 which are slidably received thereon.
  • the transverse moving framework 80 has an upper side 86, a base 90, a first side 92, and a second side 94. Side 94 is slightly peaked as best seen in FIG. 3.
  • a radiation source 96 is a conventional X-ray machine capable of producing a narrow ribbon or beam indicated on the drawings by the letter B.
  • a crystal detector 98 On the upper side 86 of the frame is a crystal detector 98 adapted to receive the beam B and convert it into electronic signals which are thereafter processed into the desired display by a computer C.
  • the computer and wires leading thereto are shown diagrammatically. However, suitable computer programming used for tomography scanning of the type performed by this invention is discussed in an article, Proceedings, National Academy of Science USA Volume 68, No.9 pages 2236-2240 (September 1971).
  • FIGS. 6 through 9 best disclose the translational or transverse movement of the X-ray machine and the collector.
  • a stepping motor 102 is mounted on a bracket 104. The output of motor 102 is fed to a gear reducer 106 which in turn rotates a pulley 108.
  • About pulley 108 is a drive tape or belt 1 10 to which frame 80 is connected.
  • the weight is assumed by rods 76 and 78.
  • a counterweight 118 of counterweight assembly 70b is carried by rod I19.
  • counterweight 118 is secured to a cable which in turn is supported by pulleys 112 and 114 as best shown in FIG. 9.
  • Cable 120 is connected to the X-ray carrying frame 80 by connector 116. Therefore, as the X-ray 96 is moved in one direction, the counterweight I18 moves in the other.
  • Another series of pulleys 122 and 124 are mounted near the top of the assembly and have a cable 126 extending thereabout.
  • the detector 98 is secured to tape 126 via the bracket 128.
  • This assembly also includes a movable counterweight 130 slidably received on the rod 132.
  • a stationary counterweight 134 is provided to counterbalance the relatively heavy X-ray mechanism attached to the lower side of frame 80.
  • FIG. 2 there is illustrated the mechanical movements of the X-ray source and the detector as they examine the interior of the skull portion of a patient.
  • the patient is located within the opening in framework 80.
  • the physician in many instances, knows the approximatel plane of the tumor.
  • a marking can be placed on the exterior of the patient's head.
  • the patient is then accurately located within the framework 80 by *sighting" through the elongated slot 95 in side 94.
  • the motor 102 then moves the transverse framework laterally as shown in FIGS. 28 and 2C in order to take the series of scans diagrammatically depicted.
  • frame 60 is rotated angularly counter-clockwise (as seen in FIG. 2) to the position shown in FIG. 2D.
  • the frame 60 is rotated a selected amount from 1 to 6 as indicated by the angle a.
  • the X-ray source and collector move transversely through for another series of scans, as seen in FIG. 2E.
  • FIG. 2F the rotating frame is rotated again to a two a position where the series of scans is again taken. This sequence continues until the rotating frame has been rotated l80".
  • the computer receives the information required for it to make a pictorial or other type of display in a single particular plane. After one plane is completed, the apparatus is returned to the start position of FIG. 2A. The patient is moved forwardly approximately two to six millimeters and another series of scans is taken in the conventional tomographic scanning manner.
  • the entire assembly can be tilted by operating the motor 32 as hereinbefore described.
  • the purpose of tilting is to locate the plane of the scanning assembly normal to a center axis of the organ under investiga tion.
  • the motors operate in accordance with a selected sequence which requires no further mechanical operation by the operator.
  • the motor 58 through a series of conventional switches, is set to move the ring 5 at one to six degree intervals.
  • the motor I02 is selected to take a beam scan from zero to six millimeters. The combination of settings is determined from the medical requirements of the particular patient under diagnosis. Additionally, the number of planes required is likewise determined from the medical requirements.
  • FIGS. 11A and 118 The shutter arrangement and its operation is shown in FIGS. 11A and 118.
  • a solenoid secured to frame 80 is disposed between the X-ray source 96 and the crystal detector 98.
  • On the upper side 86 of transverse framework 80 are a pair of photocells 142 and 144 located directly above a pair of light sources 146 and 148 on the bottom side 90.
  • the solenoid 140 carries a shutter 150 of copper or the like having a beam-receiving opening I52 therein.
  • a collimator 156 is disposed immediately below the crystal detector 98.
  • the beam-receiving slots in collimator 154 and 156 are, of course, in line with beam B.
  • the purpose of shutter 150 is to interrupt the beam until such time as the patient approaches beam B.
  • the photocells and the lights are movably mounted to their respective mounting members.
  • a band 157 of X-ray transmitting materials through which X-rays will readily pass (but opaque to light) is placed about the patients body at the section where the X-ray picture is to be taken.
  • the band 157 causes the solenoid 140 to energize just prior to the X'ray entering to thereby open the beam path.
  • FIG. 1113 shows the disposition as band 157 just interrupts the beam between light source 148 and photocell 144. This will activate the solenoid and move the slot 150 to the position shown; i.e., where the collimator slots and the slot 152 are along a common axis.
  • FIG. llC the dispostion is shown wherein the frame 80 is approaching the end of its translation movement for that portion of the body under investigation.
  • the solenoid is deenergized and a solid section of shutter will interrupt the beam between the X-ray source and detector 98.
  • the shutter is signaled to open slightly in advance and slightly after the pateint tissue enters the X-ray path. The shutter is closed when the patient is not in the path of the X-ray beam. Any simple electrical circuitry can be utilized to obtain this sequence.
  • Table 164 is comprised of a platform 166 supported by a pair of forward legs 168 and rearward legs 170. The legs are pivtoally mounted at their upper ends to the table 164 and at their lower ends, pivotally mounted to base 14.
  • An intermediate strut 172 is pivotally connected to one of the forward legs and to one of the rear legs intermediate their lengths. Strut 172 is also pivotally connected to upright 22 intermediate its length.
  • a second strut can be likewise mounted to the legs and upright 24 on the longitudinal side of the support, not shown, in FIGS. 3 and 4. Through this parallelogram arrangement the platform 166 is automatically lowered when framework is tilted.
  • a patient-carrier, stretcher-like member 180 is slidably received on platform 166 for longitudinal movement with respect thereto. Anti-friction elements can be disposed therebetween.
  • the plate 180 is formed with a rack 184 which is formed in the base of a groove extending the longitudinal length of member 180 and this rack is adapted to be engaged by the output pinion 186 of the stepping motor 188. This sliding arrangement permits the patient to be accurately moved the selected distance, usually from two to six millimeters, between the tomographic scans.
  • An improved diagnostic medical machine utilizing beams of radiation of small cross-sectional diameter for the purpose of mapping cross-sections of interior areas of the human body in combination with a computer, comprising,
  • a generally vertical first frame having an opening therethrough of a size sufficiently large to permit the patient and said table to move therethrough
  • a carrier frame rotatably mounted on said first frame and having a second opening generally coextensive with said first opening
  • first means mounting said source and collector to said carrier frame for translational movement with respect to said carrier
  • third means for tilting said first frame with respect to said patient.
  • said first means is a multisided framework and said source and collector are mounted on opposing sides thereof with said radiation beam lying in the plane of said framework, one side of said framework having an elongated opening therethrough whereby an operator can accurately align the patient with respect to said beam 3.
  • fourth means reciprocates said framework with respect to said carrier to move said source and said collector back and forth across said opening.
  • collector is a sodium iodide crystal for converting the variations in X-ray intensities into electronic signals in a form acceptable to said computer.
  • a supporting means interconnects said table to said first frame to lower said table upon a tilting of said first frame.
  • An improved diagnostic medical machine utilizing beams of radiation of small cross-sectional diameter for the purpose of mapping tomographic cross-sections of interior areas of the human body in combination with a computer, comprising,
  • a vertical first frame extending upwardly from a base and having an opening therethrough of a size sufficiently large to permit the patient to move there through
  • a carrier frame rotatably mounted with respect to said first frame and having a second opening generally coextensive and co-axial with said first open a third frame
  • first means mounting said third frame to said carrier frame for movement transverse with respect to the plane of said carrier frame and for rotation the rewith
  • a collector to receive said beamed radiation mounted on said third frame on an opposing side of said second frame.
  • third means to incrementally move said table horizontally to locate said table accurately with respect to source.
  • collector is a sodium iodide crystal for converting the variations 8 in X-ray intensities into electronic signals in arithmatic form 12.
  • a supporting means interconnects said table to said first frame to lower said table upon a tilting of said first frame.
  • counterbalance weights are mounted on said carrier frame, said frame having a center axis means operably connected to said third frame to cause said weights to shift a distance to one side of said center axis proportionate to the shift of said source and said detector to the opposite side of said center axis caused by the incremental rotational movement of said carrier frame

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Medical Informatics (AREA)
  • Physics & Mathematics (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Optics & Photonics (AREA)
  • Molecular Biology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Veterinary Medicine (AREA)
  • Pathology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Biophysics (AREA)
  • Public Health (AREA)
  • Radiology & Medical Imaging (AREA)
  • Neurology (AREA)
  • Neurosurgery (AREA)
  • Dentistry (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
US443042A 1974-02-15 1974-02-15 Diagnostic X-ray systems Expired - Lifetime US3922552A (en)

Priority Applications (13)

Application Number Priority Date Filing Date Title
US443042A US3922552A (en) 1974-02-15 1974-02-15 Diagnostic X-ray systems
CA219,880A CA1025131A (en) 1974-02-15 1975-02-12 Tomographic scanner
JP50017558A JPS50122292A (enrdf_load_stackoverflow) 1974-02-15 1975-02-13
GB639575A GB1463234A (en) 1974-02-15 1975-02-14 Tomographic apparatus
ZA00750949A ZA75949B (en) 1974-02-15 1975-02-14 Tomographic scanner
IT4817675A IT1029734B (it) 1974-02-15 1975-02-14 Perfezionamento negli apparecchi per tomografia
FR7504729A FR2260977B1 (enrdf_load_stackoverflow) 1974-02-15 1975-02-14
AU78223/75A AU491377B2 (en) 1974-02-15 1975-02-14 Tomographic scanner
DE19752506377 DE2506377A1 (de) 1974-02-15 1975-02-14 Tomographischer abtaster
AT115175A AT353899B (de) 1974-02-15 1975-02-17 Diagnosevorrichtung fuer medizinische zwecke
US05/628,708 US4005311A (en) 1974-02-15 1975-11-04 Diagnostic X-ray systems
AU34577/78A AU518378B2 (en) 1974-02-15 1978-03-29 Tomographic scanner
JP1980019783U JPS5910975Y2 (ja) 1974-02-15 1980-02-20 断層写真機械

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US443042A US3922552A (en) 1974-02-15 1974-02-15 Diagnostic X-ray systems
AU34577/78A AU518378B2 (en) 1974-02-15 1978-03-29 Tomographic scanner

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US05/628,708 Continuation-In-Part US4005311A (en) 1974-02-15 1975-11-04 Diagnostic X-ray systems

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US3922552A true US3922552A (en) 1975-11-25

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US (1) US3922552A (enrdf_load_stackoverflow)
JP (1) JPS50122292A (enrdf_load_stackoverflow)
AT (1) AT353899B (enrdf_load_stackoverflow)
AU (1) AU518378B2 (enrdf_load_stackoverflow)
CA (1) CA1025131A (enrdf_load_stackoverflow)
DE (1) DE2506377A1 (enrdf_load_stackoverflow)
FR (1) FR2260977B1 (enrdf_load_stackoverflow)
GB (1) GB1463234A (enrdf_load_stackoverflow)

Cited By (27)

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US3973127A (en) * 1974-10-09 1976-08-03 Tokyo Shibaura Electric Co., Ltd. X-ray tomography apparatus
US4088888A (en) * 1977-02-25 1978-05-09 General Electric Company Gantry for computed tomography
US4093860A (en) * 1977-02-25 1978-06-06 General Electric Company Gantry for computed tomography
US4093862A (en) * 1977-02-25 1978-06-06 General Electric Company Gantry for computed tomography
US4093861A (en) * 1977-02-25 1978-06-06 General Electric Company Gantry for computed tomography
US4097746A (en) * 1975-10-02 1978-06-27 Emi Limited Driving and positioning arrangement for radiography
US4097747A (en) * 1976-02-03 1978-06-27 U.S. Philips Corporation Device for measuring absorption of radiation in a slice of a body
US4112303A (en) * 1977-02-25 1978-09-05 General Electric Company Gantry for computed tomography
US4115695A (en) * 1977-02-25 1978-09-19 General Electric Company Gantry for computed tomography
FR2381507A1 (fr) * 1977-02-25 1978-09-22 Gen Electric Structure basculante pour appareil de tomographie a rayons x
DE2820912A1 (de) * 1977-05-13 1978-12-07 Hitachi Medical Corp Abtastvorrichtung
US4134020A (en) * 1976-10-01 1979-01-09 U.S. Philips Corporation Apparatus for measuring local absorption differences
US4136284A (en) * 1977-06-16 1979-01-23 Elscint Ltd. Apparatus for examining a body by means of penetrating radiation
US4139775A (en) * 1976-07-28 1979-02-13 Emi Limited Radiography
US4177382A (en) * 1976-04-28 1979-12-04 E M I Limited Radiography
US4200800A (en) * 1977-11-03 1980-04-29 American Science & Engineering, Inc. Reduced dose CT scanning
US4219733A (en) * 1977-04-01 1980-08-26 Siemens Aktiengesellschaft X-Ray diagnostic apparatus producing transverse layer images
US4230949A (en) * 1978-07-03 1980-10-28 Siemens Aktiengesellschaft Tomographic apparatus for producing transverse layer images of a radiography subject
US4253027A (en) * 1978-06-14 1981-02-24 Ohio-Nuclear, Inc. Tomographic scanner
US4284895A (en) * 1978-02-21 1981-08-18 Ira Lon Morgan Method and apparatus for tomographic examination of an object by penetrating radiation
US4493039A (en) * 1980-05-06 1985-01-08 President And Directors Of Georgetown University Apparatus and method for image reproduction of materials using their magnetic and electric properties
WO1991007131A1 (en) * 1989-11-13 1991-05-30 Marquardt Mark R Examination unit including positionable patient chair, examination device and support system
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
US6060713A (en) * 1993-04-05 2000-05-09 Cardiac Mariners Inc X-ray detector
US6198802B1 (en) 1998-10-06 2001-03-06 Cardiac Mariners, Inc. Scanning beam x-ray source and assembly
US6234671B1 (en) 1998-10-06 2001-05-22 Cardiac Mariners, Inc. X-ray system with scanning beam x-ray source below object table

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5746967Y2 (enrdf_load_stackoverflow) * 1976-11-30 1982-10-15
JPS582695B2 (ja) * 1977-02-14 1983-01-18 株式会社東芝 透過性放射線による検査装置
JPS53123692A (en) * 1977-04-05 1978-10-28 Toshiba Corp X-ray tomograph by computer operation
JPS6027532B2 (ja) * 1977-04-16 1985-06-29 株式会社東芝 Ｃｔスキヤナ
US4114043A (en) * 1977-05-20 1978-09-12 U.S. Philips Corporation Cable-supporting arrangement for x-ray tomographic scanner
JPS53143191A (en) * 1977-05-20 1978-12-13 Hitachi Medical Corp Xxray inspecting device
DE2802593A1 (de) * 1978-01-21 1979-07-26 Philips Patentverwaltung Geraet zur ermittlung der raeumlichen verteilung der absorption von strahlung in einem ebenen bereich
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Cited By (37)

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US3973127A (en) * 1974-10-09 1976-08-03 Tokyo Shibaura Electric Co., Ltd. X-ray tomography apparatus
US4097746A (en) * 1975-10-02 1978-06-27 Emi Limited Driving and positioning arrangement for radiography
US4097747A (en) * 1976-02-03 1978-06-27 U.S. Philips Corporation Device for measuring absorption of radiation in a slice of a body
US4177382A (en) * 1976-04-28 1979-12-04 E M I Limited Radiography
US4139775A (en) * 1976-07-28 1979-02-13 Emi Limited Radiography
US4134020A (en) * 1976-10-01 1979-01-09 U.S. Philips Corporation Apparatus for measuring local absorption differences
US4115695A (en) * 1977-02-25 1978-09-19 General Electric Company Gantry for computed tomography
US4112303A (en) * 1977-02-25 1978-09-05 General Electric Company Gantry for computed tomography
FR2381508A1 (fr) * 1977-02-25 1978-09-22 Gen Electric Appareil de tomographie
FR2381509A1 (fr) * 1977-02-25 1978-09-22 Gen Electric Appareil de tomographie a rayons x
FR2381507A1 (fr) * 1977-02-25 1978-09-22 Gen Electric Structure basculante pour appareil de tomographie a rayons x
FR2381510A1 (fr) * 1977-02-25 1978-09-22 Gen Electric Appareil de tomographie par rayons x
US4093861A (en) * 1977-02-25 1978-06-06 General Electric Company Gantry for computed tomography
US4093862A (en) * 1977-02-25 1978-06-06 General Electric Company Gantry for computed tomography
US4093860A (en) * 1977-02-25 1978-06-06 General Electric Company Gantry for computed tomography
US4088888A (en) * 1977-02-25 1978-05-09 General Electric Company Gantry for computed tomography
US4219733A (en) * 1977-04-01 1980-08-26 Siemens Aktiengesellschaft X-Ray diagnostic apparatus producing transverse layer images
DE2820912A1 (de) * 1977-05-13 1978-12-07 Hitachi Medical Corp Abtastvorrichtung
US4136284A (en) * 1977-06-16 1979-01-23 Elscint Ltd. Apparatus for examining a body by means of penetrating radiation
US4200800A (en) * 1977-11-03 1980-04-29 American Science & Engineering, Inc. Reduced dose CT scanning
US4284895A (en) * 1978-02-21 1981-08-18 Ira Lon Morgan Method and apparatus for tomographic examination of an object by penetrating radiation
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US4230949A (en) * 1978-07-03 1980-10-28 Siemens Aktiengesellschaft Tomographic apparatus for producing transverse layer images of a radiography subject
US4493039A (en) * 1980-05-06 1985-01-08 President And Directors Of Georgetown University Apparatus and method for image reproduction of materials using their magnetic and electric properties
WO1991007131A1 (en) * 1989-11-13 1991-05-30 Marquardt Mark R Examination unit including positionable patient chair, examination device and support system
US5042487A (en) * 1989-11-13 1991-08-27 Marquardt Mark R Examination unit including positionable patient chair, examination device and support system
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
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
US5644612A (en) * 1993-01-25 1997-07-01 Cardiac Mariners, Inc. Image reconstruction methods
US6649914B1 (en) 1993-01-25 2003-11-18 Cardiac Mariners, Inc. Scanning-beam X-ray imaging system
US5682412A (en) * 1993-04-05 1997-10-28 Cardiac Mariners, Incorporated X-ray source
US6060713A (en) * 1993-04-05 2000-05-09 Cardiac Mariners Inc X-ray detector
US6198802B1 (en) 1998-10-06 2001-03-06 Cardiac Mariners, Inc. Scanning beam x-ray source and assembly
US6234671B1 (en) 1998-10-06 2001-05-22 Cardiac Mariners, Inc. X-ray system with scanning beam x-ray source below object table

Also Published As

Publication number Publication date
GB1463234A (en) 1977-02-02
ATA115175A (de) 1979-05-15
AU518378B2 (en) 1981-10-01
DE2506377A1 (de) 1976-11-11
JPS50122292A (enrdf_load_stackoverflow) 1975-09-25
CA1025131A (en) 1978-01-24
AT353899B (de) 1979-12-10
FR2260977A1 (enrdf_load_stackoverflow) 1975-09-12
FR2260977B1 (enrdf_load_stackoverflow) 1979-05-11
AU3457778A (en) 1978-07-20

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