Processing

Please wait...

Settings

Settings

Goto Application

1. WO2007046012 - PMT GAIN AND ENERGY CALIBRATIONS USING LUTETIUM BACKGROUND RADIATION

Publication Number WO/2007/046012
Publication Date 26.04.2007
International Application No. PCT/IB2006/053314
International Filing Date 15.09.2006
IPC
G01T 1/29 2006.1
GPHYSICS
01MEASURING; TESTING
TMEASUREMENT OF NUCLEAR OR X-RADIATION
1Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
29Measurement performed on radiation beams, e.g. position or section of the beam; Measurement of spatial distribution of radiation
G01T 1/164 2006.1
GPHYSICS
01MEASURING; TESTING
TMEASUREMENT OF NUCLEAR OR X-RADIATION
1Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
16Measuring radiation intensity
161Applications in the field of nuclear medicine, e.g. in vivo counting
164Scintigraphy
G01T 1/202 2006.1
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
CPC
A61B 6/037
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
6Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
02Devices for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
03Computerised tomographs
037Emission tomography
G01T 1/1644
GPHYSICS
01MEASURING; TESTING
TMEASUREMENT OF NUCLEAR OR X-RADIATION
1Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
16Measuring radiation intensity
161Applications in the field of nuclear medicine, e.g. in vivo counting
164Scintigraphy
1641Static instruments for imaging the distribution of radioactivity in one or two dimensions using one or several scintillating elements; Radio-isotope cameras
1644using an array of optically separate scintillation elements permitting direct location of scintillations
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 1/2985
GPHYSICS
01MEASURING; TESTING
TMEASUREMENT OF NUCLEAR OR X-RADIATION
1Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
29Measurement performed on radiation beams, e.g. position or section of the beam; Measurement of spatial distribution of radiation
2914Measurement of spatial distribution of radiation
2985In depth localisation, e.g. using positron emitters; Tomographic imaging (longitudinal and transverse section imaging; apparatus for radiation diagnosis sequentially in different planes, steroscopic radiation diagnosis);
Applicants
  • KONINKLIJKE PHILIPS ELECTRONICS, N.V. [NL]/[NL] (AllExceptUS)
  • COOKE, Steven [US]/[US] (UsOnly)
  • LAURENCE, Thomas [US]/[US] (UsOnly)
Inventors
  • COOKE, Steven
  • LAURENCE, Thomas
Common Representative
  • KONINKLIJKE PHILIPS ELECTRONICS, N.V.
Priority Data
60/728,43317.10.2005US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) PMT GAIN AND ENERGY CALIBRATIONS USING LUTETIUM BACKGROUND RADIATION
(FR) ETALONNAGE EN GAIN ET EN ENERGIE DES TUBES PHOTOMULTIPLICATEURS PAR L'UTILISATION DU RAYONNEMENT NATUREL DU LUTECIUM
Abstract
(EN)
A scintillator (18) includes radioactive elements which emit radiation of a characteristic energy, such as lutetium176, which emits 202 keV and 307 keV ϝ-rays. The scintillators have light output levels that vary and photomultiplier tubes that respond to the light scintillations tend to drift. When a scanner (10) is not generating diagnostic images, the photomultiplier tubes detect scintillations from the lutetium176 radiation. A self- calibration processor (40) adjusts the gain for each photomultiplier tube such that its output peak corresponds to 202 keV or 307 keV and adjusts a scaling factor for PMT outputs corresponding to each scintillator such that the output peaks have a common amplitude.
(FR)
L'invention concerne un scintillateur (18) qui comprend des éléments radioactifs lesquels émettent un rayonnement présentant une énergie caractéristique, tels que le lutecium176, qui émet de rayons $g(g) de 202 keV et de 307 keV. Les scintillateurs présentent des niveaux d'émission lumineuse variables et les tubes photomultiplicateurs (TPM) réagissant à ces scintillations lumineuses tendent à présenter une dérive. Lorsqu'un scanner (10) n'est pas en train de produire des images diagnostiques, les tubes photomultiplicateurs détectent les scintillations produites par le rayonnement du lutécium 176 . Un processeur (40) d'auto-étalonnage règle le gain de chaque tube photomultiplicateur de manière que son pic d'émission corresponde à 202 keV ou à 307 keV, et adapte un facteur d'échelle pour les émissions de TPM correspondant à chaque scintillateur de telle manière que les pics d'émission présentent la même amplitude.
Latest bibliographic data on file with the International Bureau