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hal.structure.identifierIHU-LIRYC
dc.contributor.authorOZENNE, Valéry
hal.structure.identifierIHU-LIRYC
dc.contributor.authorBOUR, Pierre
hal.structure.identifierModélisation Mathématique pour l'Oncologie [MONC]
hal.structure.identifierInstitut de Mathématiques de Bordeaux [IMB]
dc.contributor.authorDE SENNEVILLE, Baudouin Denis
hal.structure.identifierCentre de recherche Cardio-Thoracique de Bordeaux [Bordeaux] [CRCTB]
dc.contributor.authorTOUPIN, Solenn
hal.structure.identifierIHU-LIRYC
dc.contributor.authorVAUSSY, Alexis
hal.structure.identifierSiemens Healthcare [France]
dc.contributor.authorLEPETIT‐COIFFÉ, Matthieu
hal.structure.identifierIHU-LIRYC
hal.structure.identifierHôpital Haut-Lévêque [CHU Bordeaux]
dc.contributor.authorJAÏS, Pierre
hal.structure.identifierIHU-LIRYC
dc.contributor.authorCOCHET, Hubert
hal.structure.identifierInstitut de rythmologie et modélisation cardiaque [Pessac] [IHU Liryc]
hal.structure.identifierIHU-LIRYC
hal.structure.identifierCentre de recherche Cardio-Thoracique de Bordeaux [Bordeaux] [CRCTB]
hal.structure.identifierImagerie moléculaire et fonctionnelle: de la physiologie à la thérapie
dc.contributor.authorQUESSON, B.
dc.date.accessioned2024-04-04T02:48:36Z
dc.date.available2024-04-04T02:48:36Z
dc.date.issued2019-11
dc.identifier.issn0952-3480
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/191753
dc.description.abstractEnList of abbreviations and Declarations are specified at the end of the main text (after Conclusion).BACKGROUND:Magnetic resonance (MR) thermometry allows visualization of lesion formation in real-time during cardiac radiofrequency (RF) ablation. The present study was performed to evaluate the precision of MR thermometry without RF heating in patients exhibiting cardiac arrhythmia in a clinical setting. The evaluation relied on quantification of changes in temperature measurements caused by noise and physiological motion.METHODS:Fourteen patients referred for cardiovascular magnetic resonance imaging underwent an extra sequence to test the temperature mapping stability during free-breathing acquisition. Phase images were acquired using a multi-slice, cardiac-triggered, single-shot echo planar imaging sequence. Temperature maps were calculated and displayed in real-time while the electrocardiogram (ECG) was recorded. The precision of temperature measurement was assessed by measuring the temporal standard deviation and temporal mean of consecutive temperature maps over a period of three minutes. The cardiac cycle was analyzed from ECG recordings to quantify the impact of arrhythmia events on the precision of temperature measurement. Finally, two retrospective strategies were tested to remove acquisition dynamics related either to arrhythmia events or sudden breathing motion.RESULTS:ECG synchronization allowed categorization of inter-beat intervals (RR) into distinct beat morphologies. Five patients were in stable sinus rhythm, while nine patients showed irregular RR intervals due to ectopic beats. An average temporal standard deviation of temperature of 1.6°C was observed in patients under sinus rhythm with a frame rate corresponding to the heart rate of the patient. The temporal standard deviation rose to 2.5°C in patients with arrhythmia. The retrospective rejection strategies increased the temperature precision measurement while maintaining a sufficient frame rate.CONCLUSIONS:Our results indicated that real-time cardiac MR thermometry shows good precision in patients under clinical conditions, even in the presence of arrhythmia. By providing real-time visualization of temperature distribution within the myocardium during RF delivery, MR thermometry could prevent insufficient or excessive heating and thus improve safety and efficacy.
dc.description.sponsorshipContrôle des Ablations Radiofréquence par Thermométrie (IRM) pour Les Oreillettes et VEntricules - ANR-17-CE19-0007
dc.language.isoen
dc.publisherWiley
dc.subject.enMagnetic Resonance Thermometry
dc.subject.enProton Resonance Frequency Shift
dc.subject.enTemperature Mapping
dc.subject.enArrhythmia
dc.subject.enMotion Correction
dc.subject.enPatient
dc.subject.enLeft Ventricle
dc.title.enAssessment of left ventricle magnetic resonance temperature stability in patients in the presence of arrhythmias
dc.typeArticle de revue
dc.identifier.doi10.1002/nbm.4160
dc.subject.halSciences du Vivant [q-bio]/Ingénierie biomédicale
dc.subject.halSciences du Vivant [q-bio]/Ingénierie biomédicale/Imagerie
bordeaux.journalNMR in Biomedicine
bordeaux.volume32
bordeaux.hal.laboratoriesInstitut de Mathématiques de Bordeaux (IMB) - UMR 5251*
bordeaux.issue11
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionBordeaux INP
bordeaux.institutionCNRS
bordeaux.peerReviewedoui
hal.identifierhal-03033104
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03033104v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=NMR%20in%20Biomedicine&rft.date=2019-11&rft.volume=32&rft.issue=11&rft.eissn=0952-3480&rft.issn=0952-3480&rft.au=OZENNE,%20Val%C3%A9ry&BOUR,%20Pierre&DE%20SENNEVILLE,%20Baudouin%20Denis&TOUPIN,%20Solenn&VAUSSY,%20Alexis&rft.genre=article


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