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1. WO1996005505 - STRUCTURED SCINTILLATION SCREENS

Publication Number WO/1996/005505
Publication Date 22.02.1996
International Application No. PCT/US1995/010392
International Filing Date 08.08.1995
Chapter 2 Demand Filed 14.02.1996
IPC
G01T 1/202 2006.01
GPHYSICS
01MEASURING; TESTING
TMEASUREMENT OF NUCLEAR OR X-RADIATION
1Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
16Measuring radiation intensity
20with scintillation detectors
202the detector being a crystal
G21K 4/00 2006.01
GPHYSICS
21NUCLEAR PHYSICS; NUCLEAR ENGINEERING
KTECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
4Conversion screens for the conversion of the spatial distribution of particles or ionising radiation into visible images, e.g. fluoroscopic screens
CPC
G01T 1/202
GPHYSICS
01MEASURING; TESTING
TMEASUREMENT OF NUCLEAR OR X-RADIATION
1Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
16Measuring radiation intensity
20with scintillation detectors
202the detector being a crystal
G21K 4/00
GPHYSICS
21NUCLEAR PHYSICS; NUCLEAR ENGINEERING
KTECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
4Conversion screens for the conversion of the spatial distribution of X-rays or particle radiation into visible images, e.g. fluoroscopic screens
Applicants
  • UNIVERSITY OF MASSACHUSETTS MEDICAL CENTER [US/US]; 55 Lake Avenue North Worcester, MA 01655, US (AllExceptUS)
  • KARELLAS, Andrew [US/US]; US (UsOnly)
Inventors
  • KARELLAS, Andrew; US
Agents
  • CLARK, Paul, T. ; Fish & Richardson P.C. 225 Franklin Street Boston, MA 02110, US
Priority Data
08/287,23908.08.1994US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) STRUCTURED SCINTILLATION SCREENS
(FR) ECRANS STRUCTURES A SCINTILLATION
Abstract
(EN)
A method for fabricating x-ray detecting structured screens using laser-based micro-machining techniques results in devices having improved spatial resolution. In one case, each pixel (74) of the screen contains an optically active scintillating material (72) surrounded with an optically inactive material (76) having a relatively lower refractive index; following absorption of light, each pixel (74) channels x-ray-induced phosphorescence to a small region of a detector. Alternatively, the optically active material (72) can be a photoconducting material, such as selenium, and the surrounding optically inactive material (76) is chosen to have a relatively high resistivity.
(FR)
Procédé de fabrication d'écrans structurés de détection de rayons X mettant en ÷uvre des techniques de micro-usinage à laser et permettant d'obtenir des dispositifs présentant une résolution spatiale améliorée. Dans l'un des cas, chaque pixel (74) de l'écran renferme un matériau scintillant optiquement actif (72) enrobé dans un matériau optiquement inactif (76) présentant un indice de réfraction relativement plus faible. Après absorption de la lumière, chaque pixel (74) achemine la phosphorescence induite par les rayons X vers une petite région d'un détecteur. Selon un autre mode de réalisation, le matériau optiquement actif (72) peut être un matériau photoconducteur, comme le sélénium, tandis que le matériau optiquement inactif (76) enrobant ce dernier est choisi pour sa résistance relativement élevée.
Also published as
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