國家衛生研究院 NHRI:Item 3990099045/8931

NHRI > Institute of Biomedical Engineering and Nanomedicine > Ze-Kai Hsiau(2001-2004) > Patents > Item 3990099045/8931

Please use this identifier to cite or link to this item: http://ir.nhri.org.tw/handle/3990099045/8931

Title:	Device and method for digitizing gamma ray energy and characterizing peak time and decay time constant without the use of ADC
Authors:	Guo, XQ;Kao, CM;Hsiau, Zk;Chen, CT
Contributors:	Institute of Biomedical Engineering and Nanomedicine
Abstract:	A device and method used in high resolution positron emission tomography (PET) systems for digitizing gamma ray energy and characterizing peak time and decay time constant, models a voltage pulse generated upon a PET event detection as a fast linearly rising edge followed by a slower exponential decay. The model includes parameters of the voltage pulse that are relevant for PET event detection including a decay constant, a peak voltage value, and a peak time, which are determined from time interval measurements of the voltage pulse. The time interval measurements are made using comparators and counters in an exemplary electronic implementation.
Date:	2007-04-03
Relation:	US7199370B2/2007-04-03
Link to:	http://v3.espacenet.com/publicationDetails/biblio?CC=US&NR=7199370&KC=B2
Appears in Collections:	[Ze-Kai Hsiau(2001-2004)] Patents

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