Fig. 10
From: MRI-guided coupling for a focused ultrasound system using a top-to-bottom propagation
MR images (using T2-W FSE) of four overlapping thermal lesions created in the gel phantom by moving the X and Y stages of the robotic system in a 2 × 2 square grid. The acoustical power used was 30 W for 30 s. The spatial step between lesions was 3 mm