Title:
RADIATION POSITION DETECTOR
Document Type and Number:
WIPO Patent Application WO/2021/006061
Kind Code:
A1
Abstract:
This invention comprises: a light reception element array 12 in which unit light reception elements (12A, 12C-12K) of a unit size are arranged in a two-dimensional plane shape; a scintillator array 30 that comprises a plurality of scintillator elements (36) that are optically connected to the light reception element array 12 and has scintillator units 38, 38A-38H each disposed so as to straddle two unit light reception elements and each having a pair of two unit scintillators 36 that each have an incidence-surface cross-sectional size with 1/4 the surface area of a unit light reception element, are optically connected at least at portions of the incidence surface sides thereof, and are separated by a reflective material 34 at the other portions; and a position evaluation unit 40 that obtains a two-dimensional radiation detection position by specifying a scintillator unit according to the presence of reception signals from each unit light reception element and specifying one unit scintillator in the scintillator unit on the basis of the reception signal strengths where there are reception signals. As a result, the spatial resolution of a digital detector is doubled without significant cost.
Inventors:
YOSHIDA EIJI (JP)
YAMAYA TAIGA (JP)
YAMAYA TAIGA (JP)
Application Number:
PCT/JP2020/025134
Publication Date:
January 14, 2021
Filing Date:
June 26, 2020
Export Citation:
Assignee:
NATIONAL INSTITUTES FOR QUANTUM AND RADIOLOGICAL SCIENCE AND TECH (JP)
International Classes:
G01T1/161; G01T1/20
Domestic Patent References:
| WO2017046928A1 | 2017-03-23 |
Foreign References:
| JPH0651069A | 1994-02-25 | |||
| JP2017072573A | 2017-04-13 | |||
| JP2003240857A | 2003-08-27 | |||
| US20110192982A1 | 2011-08-11 | |||
| US20150226862A1 | 2015-08-13 | |||
| JP2013246156A | 2013-12-09 | |||
| JP2016017851A | 2016-02-01 | |||
| JP2013140024A | 2013-07-18 | |||
| JP2009053104A | 2009-03-12 | |||
| JP2016145819A | 2016-08-12 | |||
| JP2017072573A | 2017-04-13 |
Other References:
W. W. MOSES ET AL.: "Performance of a PET detector module utilizing an array of silicon photodiodes to identify the crystal of interaction", IEEE TRANS. NUCL. SCI., vol. 40, 1993, pages 1036 - 1040
H. UCHIDAT. SAKAIH. YAMAUCHIK. HAKAMATAK. SHIMIZU: "A novel single-ended readout depth-of-interaction PET detector fabricated using sub-surface laser engraving", PHY. MED. BIO., vol. 61, 2016, pages 6635, XP020308538, DOI: 10.1088/0031-9155/61/18/6635
ZHANG: "A depth encoding PET detector using four-crystals-to-one-SiPM coupling and light-sharing window method", MEDICAL PHYSICS, 20 May 2019 (2019-05-20), Retrieved from the Internet
See also references of EP 3998499A4
H. UCHIDAT. SAKAIH. YAMAUCHIK. HAKAMATAK. SHIMIZU: "A novel single-ended readout depth-of-interaction PET detector fabricated using sub-surface laser engraving", PHY. MED. BIO., vol. 61, 2016, pages 6635, XP020308538, DOI: 10.1088/0031-9155/61/18/6635
ZHANG: "A depth encoding PET detector using four-crystals-to-one-SiPM coupling and light-sharing window method", MEDICAL PHYSICS, 20 May 2019 (2019-05-20), Retrieved from the Internet
See also references of EP 3998499A4
Attorney, Agent or Firm:
MTS PARTNERS (JP)
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