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

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

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