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1. WO2019050862 - MICRO-DOSE CALIBRATOR

Publication Number WO/2019/050862
Publication Date 14.03.2019
International Application No. PCT/US2018/049399
International Filing Date 04.09.2018
IPC
G01T 1/20 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
G01T 7/00 2006.01
GPHYSICS
01MEASURING; TESTING
TMEASUREMENT OF NUCLEAR OR X-RADIATION
7Details of radiation-measuring instruments
G01T 1/167 2006.01
GPHYSICS
01MEASURING; TESTING
TMEASUREMENT OF NUCLEAR OR X-RADIATION
1Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
16Measuring radiation intensity
167Measuring radioactive content of objects, e.g. contamination
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
G01T 1/40 2006.01
GPHYSICS
01MEASURING; TESTING
TMEASUREMENT OF NUCLEAR OR X-RADIATION
1Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
36Measuring spectral distribution of X-rays or of nuclear radiation
40Stabilisation of spectrometers
CPC
G01T 1/167
GPHYSICS
01MEASURING; TESTING
TMEASUREMENT OF NUCLEAR OR X-RADIATION
1Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
16Measuring radiation intensity
167Measuring radioactive content of objects, e.g. contamination
G01T 1/2006
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
2006using a combination of a scintillator and photodetector which measures the means radiation intensity
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
G01T 1/2023
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
2023Selection of materials
G01T 1/40
GPHYSICS
01MEASURING; TESTING
TMEASUREMENT OF NUCLEAR OR X-RADIATION
1Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
36Measuring spectral distribution of X-rays or of nuclear radiation ; spectrometry
40Stabilisation of spectrometers
G01T 7/005
GPHYSICS
01MEASURING; TESTING
TMEASUREMENT OF NUCLEAR OR X-RADIATION
7Details of radiation-measuring instruments
005calibration techniques
Applicants
  • THE UNITED STATES OF AMERICA, as represented by THE SECRETARY, DEPARTMENT OF HEALTH AND HUMAN SERVICES [US]/[US]
Inventors
  • ADLER, Stephen, S
Agents
  • ROHATGI, Rajeev
Priority Data
62/554,98006.09.2017US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) MICRO-DOSE CALIBRATOR
(FR) ÉTALONNEUR DE MICRO-DOSE
Abstract
(EN)
Methods and apparatus for calibrating radioactive sources are described. An array of scintillation detectors form a receptacle within which a sample or sample container can be retained by a holder. The scintillation detectors are coupled via light transducers such as photomultiplier tubes (PMTs) to independent electronic counters. Coincidence processing of time-tagged events yields a correlated event rate. One or more corrections can be applied as needed, for background counts, deadtime, or random coincidences. Voltage tuning of PMTs yields improved reproducibility. Variations are disclosed. 1% accuracy has been demonstrated over a range of 10 kBq - 3 MBq, covering a gap in the capabilities of conventional technology.
(FR)
L'invention concerne des procédés et un appareil d'étalonnage de sources radioactives. Un réseau de détecteurs de scintillation forme un réceptacle dans lequel un échantillon ou un récipient d'échantillon peut être retenu par un support. Les détecteurs de scintillation sont couplés par l'intermédiaire de transducteurs de lumière tels que des tubes photomultiplicateurs (PMT) à des compteurs électroniques indépendants. Un traitement de coïncidence d'événements marqués dans le temps produit un taux d'événements corrélé. Une ou plusieurs corrections peuvent être appliquées selon les besoins, pour des comptages d'arrière-plan, des temps morts ou des coïncidences aléatoires. L'accord en tension de plusieurs PMT produit une reproductibilité améliorée. L'invention concerne également des variantes. Une précision de 1 % a été démontrée sur une plage de 10 kBq à 3 MBq, couvrant un espace dans les capacités de la technologie classique.
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