Acoustic intensity measurements. (A) Skull attenuation and geometric deformation of acoustic temporal peak pressure recorded in water and through a sample of cadaver parietal bone (“skull”). Center of the beam and FWHM are displayed. Lateral shift displayed in (A) and axial shift in (C). The periodic variation in peak intensity in the axial plane in panel C is thought to be due to standing waves created by the annular geometry of the transducer. (B) Skull-attenuated ultrasound intensity map is overlaid on a single subject’s MRI. Estimation of peak focus was Read More