Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Reexamination Certificate
2007-09-26
2011-10-25
Porta, David (Department: 2884)
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
Reexamination Certificate
active
08044357
ABSTRACT:
Light emitted in correspondence to ionizing radiation incident from a scintillator is fed through an optical fiber to a photoelectron multiplier tube by which it is converted to an electrical signal. The electrical signal is amplified by a signal amplifying circuit, and any light emission events of given or higher intensity are discriminated by a discriminator and counted by a counter. The count value is fed to a computer. The computer converts the count value to a dosage on the basis of an exponential relationship lying between the light emission intensity and the number of emission events, thereby attaining detection of the dosage.
REFERENCES:
patent: 6320935 (2001-11-01), Shinar et al.
patent: 2004/0034269 (2004-02-01), Ozaki
patent: 2004/0238749 (2004-12-01), Fontbonne et al.
patent: 2001-56381 (2001-02-01), None
patent: 2003-194953 (2003-07-01), None
patent: 2004-191327 (2004-07-01), None
patent: 2004-526155 (2004-08-01), None
patent: 2005/008287 (2005-01-01), None
International Search Report for International Application No. PCT/JP2007/068675; Date of mailing Nov. 20, 2007; with English translation.
Cantor & Colburn LLP
National University Corporation Hokkaido University
Porta David
Taningco Marcus
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