http://www.cnr.it/ontology/cnr/individuo/prodotto/ID322602
Fast generation of T2* maps in the entire range of clinical interest: Application to thalassemia major patients (Articolo in rivista)
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- Label
- Fast generation of T2* maps in the entire range of clinical interest: Application to thalassemia major patients (Articolo in rivista) (literal)
- Anno
- 2015-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1016/j.compbiomed.2014.10.020 (literal)
- Alternative label
Positano, Vincenzo; Meloni, Antonella; Santarelli, Maria Filoména; Gerardi, Calogera M.; Bitti, Pier Paolo; Cirotto, Carla; De Marchi, Daniele; Salvatori, Cristina; Landini, Luigi; Pepe, Alessia (2015)
Fast generation of T2* maps in the entire range of clinical interest: Application to thalassemia major patients
in Computers in biology and medicine; Pergamon Press, Oxford (Regno Unito)
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Positano, Vincenzo; Meloni, Antonella; Santarelli, Maria Filoména; Gerardi, Calogera M.; Bitti, Pier Paolo; Cirotto, Carla; De Marchi, Daniele; Salvatori, Cristina; Landini, Luigi; Pepe, Alessia (literal)
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- http://www.scopus.com/record/display.url?eid=2-s2.0-84916918625&origin=inward (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
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- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- Consiglio Nazionale delle Ricerche; Istituto di Fisiologia Clinica del CNR; ASP Agrigento; Servizio Immunoematologia e Medicina Trasfusionale; Azienda USL 1; Universita di Pisa (literal)
- Titolo
- Fast generation of T2* maps in the entire range of clinical interest: Application to thalassemia major patients (literal)
- Abstract
- T2n maps obtainedbytheprocessingofmultiechoMRsequencescanbeusefulinseveralclinical
applications. T2n map generationproceduresshouldjoinaprocessingtimecompatiblewithon-line
image analysiswithagoodprecisionintheentire T2n rangeofclinicalinterest.Fastgenerationof T2n
maps canbeachievedbytheestimationofthe T2n valuesbytheweightedlinear fitting ofthelogarithm
of thesignal(WLSL)method.Thisapproachfailsifthesignaldecaydivergesfromapureexponential
decay,ashappensatlow T2n valueswheretherapiddecayinthesignalintensityleadstoaplateauinthe
later echotimes(TE). Theproposedmethodimplementstheautomatictruncationofthesignaldecay
curves tobe fitted inordertocompensateforthesignalcollapseatlow T2n values,allowingthe
extensionoftheWLSLmethodthroughtheentireclinicalrangeof T2n values.
Validation wasperformedonsyntheticimagesandon60thalassemiamajorpatientswithdifferent
levels ofmyocardialironoverload.Phantomexperimentsshowedthata5% fitting errorthreshold
representedthebestcompromisebetween T2n valuemeasurementprecisionandprocessingtime.A
good agreementwasfoundbetween T2n map pixel-wisemeasurementsandROI-basedmeasurements
performed byexpertreaders(CoV¼1.84%inglobalheart T2n, CoV¼5.8% insegmentalanalysis).In
conclusion, thedevelopedprocedurewaseffectiveingeneratingcorrect T2n maps fortheentire T2n
clinical range. (literal)
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