Data acquisition electronics for gamma ray emission tomography using width-modulated leading-edge discriminators

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dc.contributor.author Tapias, Gustavo
dc.contributor.author Villena, José L.
dc.contributor.author Desco Menéndez, Manuel
dc.contributor.author Vaquero López, Juan José
dc.contributor.author Lage Negro, Eduardo
dc.date.accessioned 2011-09-16T10:40:24Z
dc.date.available 2011-09-16T10:40:24Z
dc.date.issued 2010-08
dc.identifier.bibliographicCitation Physics in Medicine and Biology, Ago. 2010, vol. 55, n. 15, p. 4291-4308
dc.identifier.issn 0031-9155 (print version)
dc.identifier.issn 1361-6560 (online version)
dc.identifier.uri http://hdl.handle.net/10016/12101
dc.description.abstract We present a new high-performance and low-cost approach for implementing radiation detection acquisition systems. The basic elements used are chargeintegrating ADCs and a set of components encapsulated in an HDL (hardware definition language) library which makes it possible to implement several acquisition tasks such as time pickoff and coincidence detection using a new and simple trigger technique that we name WMLET (width-modulated leading-edge timing). As proof of concept, a 32-channel hybrid PET/SPECT acquisition system based on these elements was developed and tested. This demonstrator consists of a master module responsible for the generation and distribution of trigger signals, 2×16-channelADCcards (12-bit resolution) for data digitization and a 32-bit digital I/OPCI card for handling data transmission to a personal computer. System characteristics such as linearity, maximum transmission rates or timing resolution in coincidence mode were evaluated with test and real detector signals. Imaging capabilities of the prototype were also evaluated using different detector configurations. The performance tests showed that this implementation is able to handle data rates in excess of 600k events s−1 when acquiring simultaneously 32 channels (96-byte events). ADC channel linearity is >98.5% in energy quantification. Time resolution in PET mode for the tested configurations ranges from 3.64 ns FWHM to 7.88 ns FWHM when signals from LYSO-based detectors are used. The measured energy resolution matched the expected values for the detectors evaluated and single elements of crystal matrices can be neatly separated in the acquired flood histograms
dc.description.sponsorship This project was supported and funded by the CENIT Program (Ministerio de Industria), CIBER CB07/09/0031 (Ministerio de Sanidad y Consumo), TEC2007-64731/TCM and TEC2008-06715-C02-01 (Ministerio de Educación y Ciencia), and the ARTEMIS program P2009/DPI-1802, Comunidad de Madrid
dc.format.mimetype application/pdf
dc.language.iso eng
dc.publisher IOPscience
dc.rights © 2010 Institute of Physics and Engineering in Medicine
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subject.other Positron emission tomography (PET) ; Ancillary equipment ; Image quality ; Medical physics
dc.title Data acquisition electronics for gamma ray emission tomography using width-modulated leading-edge discriminators
dc.type article
dc.description.status Publicado
dc.relation.publisherversion http://dx.doi.org/10.1088/0031-9155/55/15/007
dc.subject.eciencia Biología y Biomedicina
dc.identifier.doi 10.1088/0031-9155/55/15/007
dc.rights.accessRights openAccess
dc.relation.projectID Comunidad de Madrid. S2009/DPI-1802/ARTEMIS
dc.type.version acceptedVersion
dc.identifier.publicationfirstpage 4291
dc.identifier.publicationissue 15
dc.identifier.publicationlastpage 4308
dc.identifier.publicationtitle Physics in Medicine and Biology
dc.identifier.publicationvolume 55
dc.identifier.uxxi AR/0000007153
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