Fig. 2.

Axial view of the FUS experimental set-up used here. The transducer was attached at the bottom of a custom-built tank and immersed in a bath of degassed, de-ionized water. The size of the tank was designed to fit into an eight-channel head coil. A gel phantom was placed over the transducer. The focused ultrasound beam was delivered through water into the gel phantom, with focus within the phantom. Temperature mapping images were acquired in the axial plane that included the focal location.