Rapid motion correction in MR-guided high-intensity focused ultrasound heating using real-time ultrasound echo information

Philippe Lourenço de Oliveira (1) , Baudouin Denis de Senneville (2) , Iulius Dragonu (1) , Chrit T W Moonen (1)

1 Imagerie moléculaire et fonctionnelle: de la physiologie à la thérapie
2 IMB - Institut de Mathématiques de Bordeaux

The objective of this study was to evaluate the feasibility of integrating real-time ultrasound echo guidance in MR-guided high-intensity focused ultrasound (HIFU) heating of mobile targets in order to reduce latency between displacement analysis and HIFU treatment. Experiments on a moving phantom were carried out with MRI-guided HIFU during continuous one-dimensional ultrasound echo detection using separate HIFU and ultrasound imaging transducers. Excellent correspondence was found between MR-and ultrasound-detected displacements. Real-time ultrasound echo-based target tracking during MR-guided HIFU heating is shown with the dimensions of the heated area similar to those obtained for a static target. This work demonstrates that the combination of the two modalities opens up perspectives for motion correction in MRI-guided HIFU with negligible latency.

Mots clés: ultrasound echo; motion correction; real time; MRI

Domaines: Traitement du signal et de l'image [eess.SP]; Imagerie

Philippe Lourenço de Oliveira, Baudouin Denis de Senneville, Iulius Dragonu, Chrit T W Moonen. Rapid motion correction in MR-guided high-intensity focused ultrasound heating using real-time ultrasound echo information. NMR in Biomedicine, 2010, 23 (9), pp.1103-1108. ⟨10.1002/nbm.1526⟩. ⟨hal-01503908⟩