IL40460A - Nuclear imaging system - Google Patents

Nuclear imaging system

Info

Publication number
IL40460A
IL40460A IL40460A IL4046072A IL40460A IL 40460 A IL40460 A IL 40460A IL 40460 A IL40460 A IL 40460A IL 4046072 A IL4046072 A IL 4046072A IL 40460 A IL40460 A IL 40460A
Authority
IL
Israel
Prior art keywords
particles
accordance
pattern
regions
spatially
Prior art date
Application number
IL40460A
Other versions
IL40460A0 (en
Original Assignee
Raytheon Co
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 Raytheon Co filed Critical Raytheon Co
Publication of IL40460A0 publication Critical patent/IL40460A0/en
Publication of IL40460A publication Critical patent/IL40460A/en

Links

Classifications

    • 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
    • G01T1/1641—Static instruments for imaging the distribution of radioactivity in one or two dimensions using one or several scintillating elements; Radio-isotope cameras
    • G01T1/1645—Static instruments for imaging the distribution of radioactivity in one or two dimensions using one or several scintillating elements; Radio-isotope cameras using electron optical imaging means, e.g. image intensifier tubes, coordinate photomultiplier tubes, image converter
    • 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
    • A61B6/4258—Arrangements for detecting radiation specially adapted for radiation diagnosis characterised by using a particular type of detector for detecting non x-ray radiation, e.g. gamma radiation
    • 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
    • G01T1/1641—Static instruments for imaging the distribution of radioactivity in one or two dimensions using one or several scintillating elements; Radio-isotope cameras
    • 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
    • G01T1/1641—Static instruments for imaging the distribution of radioactivity in one or two dimensions using one or several scintillating elements; Radio-isotope cameras
    • G01T1/1642—Static instruments for imaging the distribution of radioactivity in one or two dimensions using one or several scintillating elements; Radio-isotope cameras using a scintillation crystal and position sensing photodetector arrays, e.g. ANGER cameras
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
    • G01T1/29—Measurement performed on radiation beams, e.g. position or section of the beam; Measurement of spatial distribution of radiation
    • G01T1/2914—Measurement of spatial distribution of radiation
    • G01T1/2921—Static instruments for imaging the distribution of radioactivity in one or two dimensions; Radio-isotope cameras
    • G01T1/295—Static instruments for imaging the distribution of radioactivity in one or two dimensions; Radio-isotope cameras using coded aperture devices, e.g. Fresnel zone plates

Landscapes

  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Medical Informatics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Molecular Biology (AREA)
  • Engineering & Computer Science (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Radiology & Medical Imaging (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Pathology (AREA)
  • Biophysics (AREA)
  • Nuclear Medicine (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Claims (20)

40460 2 ,ΗΛΤ IS CLAIMED IS:
1. The method comprising the steps of: introducing radioactive material into an organ of a living body; forming a spatially coded pattern of high energy particles emitted from said radioactive material with a spatial code having at least a component which is substantially symmetrical about an axis substantially parallel to the average direction of motion of said particles by directing said particles through a structure comprising a plurality of regions of different sizes substantially permeable to said particles separated by intervening differently spaced regions substantially less permeable to said high energy particles than said substantially permeable regions, with the average thickness of said less permeable regions in a direction along said axis being on the same order of magnitude as the average of said spacings in a direction transverse to said axis; spatially detecting at least a portion of said pattern; and deriving an image of said radioactive material in said organ from said spatial detection of said pattern.
2. The method in accordance with claim 1 wherein said spatially coded pattern is formed at least in part by selectively absorbing certain of said particles as a function of said spatial code, with particles emitted from any point in said radioactive material passing through any of a majority of said apertures.
3. The method in accordance with claim 2 wherein 40460 2 said spatially detecting step comprises converting the energy level of said nuclear particles radiated from said organ to radiation of a lower intensity than the intensity of said nuclear particles*
4. The method in accordance with claim 2 wherein said image deriving step comprises recording a spatial pattern having at least a component of said spatially coded pattern and deriving an image therefrom with a beam of substantially coherent light.
5. The method in accordance with claim 1 wherein said detection comprises producing electrical signals in response to the detection of said nuclear particles,
6. The method comprising the steps of: introducing radioactive material into an organ of a living body; spatially coding high energy particles emitted from said radioactive material in accordance with a spatial coding pattern having at least a component which is substantially symmetrical about an axis parallel to the average direction of motion of the spatially coded pattern of said particles; forming a spatially coded pattern of high energy particles emitted from said radioactive material with a spatial code having at least a component which is substantially symmetrical about an axis substantially parallel to the average direction of motion of said particles by directing said particles through a structure having a plurality of regions substantially 40 60 2 permeable to said particles separated by differently spaced intervening regions substantially less permeable to said high energy particles, with the thickness of said regions in a direction parallel to said axis being less than the largest of said spacings in a direction perpendicular to said axis; and spatially detecting said spatially coded pattern of high energy particles.
7. The method in accordance with claim 6 wherein: said spatial coding step comprises absorbing certain of said particles by said coding structure as a function of said spatial code; and the distance between said radioactive material and said coding structure is on the same order of magnitude as the distance between the coding structure and the region where said spatially coded pattern is detected.
8. The method in accordance with claim 6 wherein at least a component of said spatially coded pattern comprises at least a portion of a Fresnel zone pattern
9. The method in accordance with claim 6 wherein at least a component of said pattern comprises an off-center section of a Fresnel zone pattern.
10. The method in accordance with claim 9 wherein said spatially detecting step comprises producing elec trical signals. 40460
11. The method in accordance with claim 9 wherein the spatial frequency response of the detection is matched to at least a component of said spatially coded pattern.
12. Apparatus for detecting a spatially coded pattern of radiation having an energy level above visible radiation derived from a radiopharmaceutical selectively absorbed by an organ of a living body comprising: means for forming a spatially coded pattern of high energy particles emitted from a plurality of areas of said radiopharmaceutical with a spatial code having at least a component which is substantially symmetrical about an axis substantially parallel to the average direction of motion of said particles comprising a structure having a plurality of regions of different sizes substantially permeable to said particles separated by intervening regions of different sizes which are substantially less permeable to said high energy particles than said permeable regions, with the thickness of said intervening regions in a direction parallel to said axis being less than the average width of said intervening regions in a direction perpendicular to said axis; and means for spatially detecting at least a portion of said pattern.
13. The apparatus in accordance with claim 12 wherein: the spacing of said permeable regions and said thickness of said intervening regions permit high energy particles 40460 2 emitted from a point in said radiopharmaceutical in said organ to pass through any of the majority of said apertures.
14. The apparatus in accordance with claim 12 wherein: said permeable regions are of different arcuate sizes.
15. The apparatus in accordance with claim 12 wherein: said spatial code has spatial frequencies lying in the same frequency range as the majority of the spatial frequency components of the spatial informational content of said particles emitted from the radiopharmaceutical.
16. The apparatus in accordance with claim 15 wherein: said regions are of different arcuate sizes.
17. The apparatus in accordance with claim 16 wherein: said coding structure comprises a mask forming at least a portion of a Fresnel zone pattern.
18. The apparatus in accordance with claim 17 wherein: said mask forms the off-center section of a Fresnel zone pattern.
19. The apparatus in accordance with claim 18 wherein: said detecting means comprises means for converting said high energy particles to radiation of a lower energy level and means for spatially detecting said lower energy level.
20. The apparatus in accordance with claim 19, and means for reproducing an image of the loaations of said radiopharmaceutical in said organ from said spatially detected pattern. CO P. O. Box 33116 , Tel-Aviv Attorneys for A plicant
IL40460A 1971-11-01 1972-09-28 Nuclear imaging system IL40460A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US19438271A 1971-11-01 1971-11-01

Publications (2)

Publication Number Publication Date
IL40460A0 IL40460A0 (en) 1972-11-28
IL40460A true IL40460A (en) 1976-05-31

Family

ID=22717385

Family Applications (1)

Application Number Title Priority Date Filing Date
IL40460A IL40460A (en) 1971-11-01 1972-09-28 Nuclear imaging system

Country Status (12)

Country Link
JP (1) JPS4853782A (en)
AT (1) AT337321B (en)
AU (1) AU467247B2 (en)
BR (1) BR7207577D0 (en)
CA (1) CA972477A (en)
CH (1) CH573124A5 (en)
DE (1) DE2253197A1 (en)
FR (1) FR2159932A5 (en)
GB (1) GB1379084A (en)
IL (1) IL40460A (en)
IT (1) IT966476B (en)
NL (1) NL7214774A (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4420637Y1 (en) * 1968-03-01 1969-09-03

Also Published As

Publication number Publication date
IT966476B (en) 1974-02-11
ATA926472A (en) 1976-10-15
CA972477A (en) 1975-08-05
CH573124A5 (en) 1976-02-27
JPS4853782A (en) 1973-07-28
FR2159932A5 (en) 1973-06-22
AT337321B (en) 1977-06-27
IL40460A0 (en) 1972-11-28
GB1379084A (en) 1975-01-02
AU4713572A (en) 1974-04-04
NL7214774A (en) 1973-05-03
AU467247B2 (en) 1975-11-27
DE2253197A1 (en) 1973-05-10
BR7207577D0 (en) 1973-12-18

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