Publication:
Complete Scheme for Beam Hardening Correction in Small Animal Computed Tomography

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dc.affiliation.dptoUC3M. Departamento de Bioingenieríaes
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Biomedical Imaging and Instrumentation Groupes
dc.affiliation.grupoinvUC3M. Grupo de Investigación: BSEL - Laboratorio de Ciencia e Ingeniería Biomédicaes
dc.contributor.authorMolina, Claudia dees
dc.contributor.authorSisniega, Alejandroes
dc.contributor.authorDesco Menéndez, Manueles
dc.contributor.authorVaquero López, Juan Josées
dc.contributor.authorAbella García, Mónicaes
dc.date.accessioned2015-03-16T12:09:33Z
dc.date.available2015-03-16T12:09:33Z
dc.date.issued2012
dc.descriptionProceedings of: 2012 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC). Anaheim, California, USA. October 29 - November 3, 2012en
dc.description.abstractCT images are often affected by beam hardening artifacts (cupping and dark streaks) due to the polyenergetic nature of the X-ray beam. FDK is still the favorite reconstruction algorithm in commercial X-ray CT scanners. Several correction methods have been proposed to be included in an FDK reconstruction scheme. We present a complete correction scheme for beam hardening artifact correction in an FDK based reconstruction scenario that accounts for both cupping artifact and dark streaks avoiding the need of the knowledge of the source spectrum. The proposed correction scheme includes two steps: a linearization step of projection data and a post-reconstruction step. The first step assumes that the object is homogeneous and uses a linearization function that is calculated empirically in a previous calibration process with a simple phantom. The second step is based in the theoretical study described in Joseph and Spital, and calculates the non-linear beam-hardening distortion from a bone segmentation of the reconstructed image. The proposed correction scheme was evaluated in real studies acquired with a cone-beam micro-CT scanner: three polymethylmethacrylate cylinders (3, 4, and 6 cm diameter), a two-density cylindrical phantom and three rodent studies. Results show an average cupping reduction of 84 % in the three homogeneous phantoms and an average dark streaks reduction of 80 % in the two-density phantom and the three rodent studies. The proposed method could be incorporated easily in any cone beam micro-CT scanner and substitutes the need of the knowledge of the spectrum by empirical measurements and two parameters. Since it is based on empirical measurements, we expected to correct the artifacts derived from scattering.en
dc.description.sponsorshipThis work was supported in part by projects TEC2008-06715 and TEC2007-64731 (Ministerio de Ciencia e Innovaci6n), EU-FP7 FMTXCT-201792, ARTEMIS S2009/DPI-1802 (Comunidad de Madrid), and European Regional Development Funds (FEDER) and CDTI under the CENIT program (AMIT project, CEN-20101014).es
dc.description.statusPublicadoes
dc.format.extent4
dc.format.mimetypeapplication/pdf
dc.identifier.bibliographicCitationBo Yu (ed.) (2012). 2012 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC): Anaheim, California, USA. October 29 - November 3, 2012 . IEEE, 3835-3838en
dc.identifier.doi10.1109/NSSMIC.2012.6551880
dc.identifier.isbn978-1-4673-2028-3
dc.identifier.issn1082-3654
dc.identifier.publicationfirstpage3835
dc.identifier.publicationlastpage3838es
dc.identifier.publicationtitle2012 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC): Anaheim, California, USA. October 29 - November 3, 2012.en
dc.identifier.urihttps://hdl.handle.net/10016/20278
dc.identifier.uxxiCC/0000016003
dc.language.isoengen
dc.publisherIeee - The Institute Of Electrical And Electronics Engineers, Incen
dc.relation.eventdateOctober 29 - November 3, 2012en
dc.relation.eventplaceAnaheim, California, USAen
dc.relation.eventtitle2012 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)en
dc.relation.projectIDGobierno de España. TEC2008-06715es
dc.relation.projectIDGobierno de España. TEC2007-64731es
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/FP7/201792en
dc.relation.projectIDComunidad de Madrid. S2009/DPI-1802/ARTEMISes
dc.relation.publisherversionhttp://dx.doi.org/10.1109/NSSMIC.2012.6551880es
dc.rights© 2012 IEEE.es
dc.rights.accessRightsopen accessen
dc.subject.ecienciaBiología y Biomedicinaes
dc.subject.otherComputerised tomographyen
dc.subject.otherDiagnostic radiographyen
dc.subject.otherImage reconstructionen
dc.subject.otherMedical image processingen
dc.subject.otherPhantomsen
dc.titleComplete Scheme for Beam Hardening Correction in Small Animal Computed Tomographyen
dc.typeconference paper*
dc.type.hasVersionAM*
dspace.entity.typePublication
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