Fast generation of T2* maps in the entire range of clinical interest: Application to thalassemia major patients (Articolo in rivista)

Type
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)
Pagina inizio
  • 200 (literal)
Pagina fine
  • 210 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://www.scopus.com/record/display.url?eid=2-s2.0-84916918625&origin=inward (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 56 (literal)
Rivista
Note
  • Scopu (literal)
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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