Fig. 7

Steering pressure patterns. Hydrophone scans of the phase correction method applied to the ex vivo skull flap with beam steering at a location 5 mm transverse to the geometric focus. The intended treatment location is at 0 mm in y and 5 mm in x. a Hydrophone scans with no phase correction. b Corrections using simulated phases. c Correction using hydrophone-measured phases. The arrow indicates a primary side lobe with 54 % of the main lobe pressure