DENIS DE SENNEVILLE, Baudouin; ROUJOL, Sébastien; MOONEN, Chrit; RIES, Mario

doi:10.1002/mrm.22514

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

DENIS DE SENNEVILLE, Baudouin
Institut de Mathématiques de Bordeaux [IMB]

ROUJOL, Sébastien
Imagerie moléculaire et fonctionnelle: de la physiologie à la thérapie

MOONEN, Chrit
Imagerie moléculaire et fonctionnelle: de la physiologie à la thérapie

Langue

Article de revue

Ce document a été publié dans

Magnetic Resonance in Medicine. 2010, vol. 64, n° 5, p. 1373–1381

Wiley

Résumé en anglais

Reliable temperature and thermal-dose measurements using proton resonance frequency shift-based MR-thermometry AQ2 for MR-guided ablation of abdominal organs require a robust correction of artefacts induced by the target displacement through an inhomogeneous and time-variant magnetic field. Two correction approaches emerged recently as promising candidates to allow continuous real-time MR-thermometry under free-breathing conditions: The multibaseline correction method, which relies on a pre-recorded correction table allowing to correct for periodic phase changes, and the referenceless method, which depends on a background phase estimation in the target area based on the assumption of a smooth spatial variation of the phase across the organ. This study combines both methods with real-time in-plane motion correction to permit both temperature and thermal-dose calculations on the fly. Subsequently , the practical aspects of both methods are compared in two application scenarios, a radio frequency-ablation and a high-intensity focused ultrasound ablation. A hybrid approach is presented that exploits the strong points of both methods, allowing accurate and precise proton resonance frequency-thermometry measurements during periodical displacement, even in the presence of spontaneous motion and strong susceptibility variations in the target area.< Réduire

Mots clés en anglais

artifacts

technique development

technical research

correction

susceptibility

Métadonnées

Partager cette publication !

Licence d’utilisation du document

Motion correction in MR thermometry of abdominal organs: A comparison of the referenceless vs. the multibaseline approach

Langue

Ce document a été publié dans

Résumé en anglais

Mots clés en anglais

URI

DOI

Origine

Unités de recherche