An ultrasound system (100) for imaging a volumetric region comprising a region of interest (12) comprising: a probe having an array of CMUT transducers (14) adapted to transmit ultrasound beams and receive returning echo signals over the volumetric region； a beamformer (64) coupled to the array and adapted to control ultrasound beam transmission and provide ultrasound image data of the volumetric region； a transducer controller (62) coupled to the beamformer and adapted to vary driving pulse characteristics of the CMUT transducers, a region of interest identifier (72) enabling an identification of a region of interest on the basis of the ultrasound image data； a beam path analyzer (70) responsive to the ROI identification and arranged to detect an attenuating tissue type in between the probe and the ROI based on a depth variation in attenuation of the received signal； wherein the transducer controller is further adapted to change, based on the attenuating tissue type detection, at least one parameter of the driving pulse characteristics.
