Fig. 1. Coronal (A) and sagittal (B) magnetic resonance (MR) thermometry images show temperature overlay and the magnetic resonance (MR); white lines, white arrow) during volumetric MR imaging (MRI)-guided high intensity focused ultrasound surgery (MRgFUS) ablation with a 16 mm treatment cell. X-shaped two white triangles are their presumed sonication pathway. Yellow box indicate the 30-240 EM area, the possible thermal damage (yellow arrow). MR thermometry show the temperature of abdominal skin (C) & tissues adjacent to sacrum (D).