Effects of sinogram filtering in the quality of PET reconstructions: preliminary results

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dc.contributor.author Abella García, Mónica
dc.contributor.author Redondo, Santiago
dc.contributor.author Vaquero López, Juan José
dc.contributor.author Sánchez González, Javier
dc.contributor.author Desco Menéndez, Manuel
dc.date.accessioned 2011-10-06T10:21:28Z
dc.date.available 2011-10-06T10:21:28Z
dc.date.issued 2006
dc.identifier.bibliographicCitation 2006 IEEE Nuclear Science Symposium Conference Record, 2006, vol. 4, p. 2206 - 2209
dc.identifier.isbn 1-4244-0560-2
dc.identifier.issn 1082-3654
dc.identifier.uri http://hdl.handle.net/10016/12240
dc.description Proceeding of: 2006 IEEE Nuclear Science Symposium Conference Record, San Diego, CA, Oct. 29 - Nov. 1, 2006
dc.description.abstract Low-pass filtering sinograms prior to reconstruction is a general practice to reduce noise. Sinograms are generally filtered in the radial direction, although other filtering schemes have been proposed. It is known that the Fourier transform of a sinogram shows a particular shape of the spectral energy distribution (“bow-tie”). In this work, this property has been exploited to perform an adapted filter, whose performance has been compared with previously reported methods: angular, axial and stackgram domain filtering. Stackgram and angular filtering degraded resolution (~16 and ~5.7 % respectively) while no significant enhancement in contrast to noise ratio (CNR) was achieved. Angular filtering resulted in a circle blurring artifact dependant on the distance to the center of the FOV. Bow-tie filtering showed the best results (enhancement of ~26% in resolution and of ~12% in CNR). Axial filtering degraded resolution but enhanced CNR (~14 %), appearing as a good strategy to reduce radial filtering. Experiments on rodent images showed a noticeable image quality enhancement achieved when using bow-tie filtering combined with radial and axial filters.
dc.description.sponsorship This work was supported in part by from Ministerio de Educación y Ciencia (FIS-PI052583 and TEC2004-07052-C02), Ministerio de Industria (CD-TEAM, CENIT program) and Comunidad de Madrid (GR/SAL/024104).
dc.format.mimetype application/pdf
dc.language.iso eng
dc.publisher IEEE
dc.rights © IEEE
dc.title Effects of sinogram filtering in the quality of PET reconstructions: preliminary results
dc.type bookPart
dc.type conferenceObject
dc.relation.publisherversion http://dx.doi.org/10.1109/NSSMIC.2006.354190
dc.subject.eciencia Biología y Biomedicina
dc.identifier.doi 10.1109/NSSMIC.2006.354190
dc.rights.accessRights openAccess
dc.relation.eventdate Oct. 29 - Nov. 1, 2006
dc.relation.eventplace San Diego, CA
dc.relation.eventtitle 2006 IEEE Nuclear Science Symposium Conference Record
dc.identifier.publicationfirstpage 2206
dc.identifier.publicationlastpage 2209
dc.identifier.publicationtitle 2006 IEEE Nuclear Science Symposium Conference Record
dc.identifier.publicationvolume 4
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