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Compressed-Sensing MP2RAGE sequence: Application to the detection of brain metastases in mice at 7T

dc.relation.isnodoubled6866ee6-11f9-4169-8ed3-533e6eda9cff*
dc.relation.isnodoubled1c1c4fe-9f04-4bf8-b0e9-4a7c68d19382*
hal.structure.identifierCentre de résonance magnétique des systèmes biologiques [CRMSB]
dc.contributor.authorTROTIER, Aurelien
hal.structure.identifierCentre de résonance magnétique biologique et médicale [CRMBM]
dc.contributor.authorRAPACCHI, Stanislas
hal.structure.identifierCentre de résonance magnétique des systèmes biologiques [CRMSB]
dc.contributor.authorFALLER, Thibaut
hal.structure.identifierCentre de résonance magnétique des systèmes biologiques [CRMSB]
dc.contributor.authorMIRAUX, Sylvain
IDREF: 150967047
hal.structure.identifierCentre de résonance magnétique des systèmes biologiques [CRMSB]
dc.contributor.authorRIBOT, Emeline
dc.date.accessioned2021-10-07T16:30:00Z
dc.date.available2021-10-07T16:30:00Z
dc.date.issued2019-01
dc.identifier.issn0740-3194
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/112679
dc.description.abstractEnTo develop a Compressed Sensing (CS)-MP2RAGE sequence to drastically shorten acquisition duration and then detect and measure the T1 of brain metastases in mice at 7 T.METHODS:The encoding trajectory of the standard Cartesian MP2RAGE sequence has been modified (1) to obtain a variable density Poisson disk under-sampling distribution along the ky -kz plane, and (2) to sample the central part of the k-space exactly at TI1 and TI2 inversion times. In a prospective study, the accuracy of the T1 measurements was evaluated on phantoms containing increasing concentrations of gadolinium. The CS acceleration factors were increased to evaluate their influence on the contrast and T1 measurements of brain metastases in vivo. Finally, the 3D T1 maps were acquired with at 4-fold increased spatial resolution. The volumes and T1 values of the metastases were measured while using CS to reduce scan time.RESULTS:The implementation of the CS-encoding trajectory did not affect the T1 measurements in vitro. Accelerating the acquisition by a factor of 2 did not alter the contrast or the T1 values of the brain metastases. 3D T1 maps could be obtained in < 1 min using a CS factor of 6. Increasing the spatial resolution enabled more accurately measurement of the metastasis volumes while maintaining an acquisition duration below 5 min.CONCLUSION:The CS-MP2RAGE sequence could be of great interest in oncology to either rapidly obtain mouse brain 3D T1 maps or to increase the spatial resolution with no penalty on the scan duration.
dc.language.isoen
dc.publisherWiley
dc.subject.enmouse brain
dc.subject.enmetastases
dc.subject.encompressed sensing
dc.subject.enMP2RAGE
dc.subject.en7T
dc.title.enCompressed-Sensing MP2RAGE sequence: Application to the detection of brain metastases in mice at 7T
dc.typeArticle de revue
dc.identifier.doi10.1002/mrm.27438
dc.subject.halSciences du Vivant [q-bio]/Ingénierie biomédicale/Imagerie
dc.subject.halPhysique [physics]/Physique [physics]/Physique Médicale [physics.med-ph]
bordeaux.journalMagnetic Resonance in Medicine
bordeaux.page551-559
bordeaux.volume81
bordeaux.hal.laboratoriesCentre de Résonance Magnétique des Systèmes Biologiques (CRMSB) - UMR 5536*
bordeaux.issue1
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionCNRS
bordeaux.peerReviewedoui
hal.identifierhal-02117900
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02117900v1
bordeaux.COinSctx_ver=Z39.88-2004&amp;rft_val_fmt=info:ofi/fmt:kev:mtx:journal&amp;rft.jtitle=Magnetic%20Resonance%20in%20Medicine&amp;rft.date=2019-01&amp;rft.volume=81&amp;rft.issue=1&amp;rft.spage=551-559&amp;rft.epage=551-559&amp;rft.eissn=0740-3194&amp;rft.issn=0740-3194&amp;rft.au=TROTIER,%20Aurelien&amp;RAPACCHI,%20Stanislas&amp;FALLER,%20Thibaut&amp;MIRAUX,%20Sylvain&amp;RIBOT,%20Emeline&amp;rft.genre=article


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