DENIS DE SENNEVILLE, Baudouin; EL HAMIDI, Abdallah; MOONEN, Chrit

doi:10.1109/TMI.2014.2371995

La plateforme OSKAR Bordeaux évolue pour rejoindre l'archive ouverte HAL. Retrouvez tous vos dépôts sur le nouveau portail HAL UB : https://u-bordeaux.hal.science/. Pour toute aide ou information, contactez-nous info@oskar-bordeaux.fr

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

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

EL HAMIDI, Abdallah
Laboratoire des Sciences de l'Ingénieur pour l'Environnement - UMR 7356 [LaSIE]

MOONEN, Chrit
Imaging Division

Langue

Article de revue

Ce document a été publié dans

IEEE Transactions on Medical Imaging. 2015-03-01, vol. 34, n° 4, p. 974-982

Institute of Electrical and Electronics Engineers

Résumé en anglais

Dynamic MR-imaging can provide functional and positional information in real-time, which can be conveniently used on-line to control a cancer therapy, e.g. using High Intensity Focused Ultrasound or Radio Therapy. However, a precise real-time correction for motion is fundamental in abdominal organs to ensure an optimal treatment dose associated with a limited toxicity in nearby organs at risk.This paper proposes a real-time direct PCA-based technique which offers a robust approach for motion estimation of abdominal organs and allows correcting motion related artifacts. The PCA was used to detect spatio-temporal coherences of the periodic organ motion in a learning step. During the interventional procedure, physiological contributions were characterized quantitatively using a small set of parameters. A coarse-to-fineresolution scheme is proposed to improve the stability of the algorithm and afford a predictable constant latency of 80 ms.The technique was evaluated on 12 free-breathing volunteers and provided an improved real-time description of motion related to both breathing and cardiac cycles. A reduced learning step of 10 s was sufficient without any need for patient-specific control parameters, rendering the method suitable for clinical use.< Réduire

Métadonnées

Partager cette publication !

Licence d’utilisation du document

A direct PCA-based approach for real-time description of physiological organ deformations

Langue

Ce document a été publié dans

Résumé en anglais

URI

DOI

Origine

Unités de recherche