An ultrasound system for providing an ultrasound image of a volumetric region comprising a region of interest comprising: - a probe having an array of CMUT transducers, which array has a pitch value (p) in at least one of azimuth and elevation dimensions, which array is adapted to steer ultrasound beams in a variable frequency range over the volumetric region; - a beamformer coupled to the array and adapted to control the ultrasound beam steering and to provide an ultrasound image data of the volumetric region, wherein the beams are steered within at least one of azimuth and elevation steering angles; - a transducer frequency controller coupled to the beamformer and adapted to vary operation frequencies of the CMUT transducers within the frequency range, which frequency controller is arranged to set the operation frequency to a first frequency for the ultrasound beam steered in the volumetric region and to change the operation frequency to a second frequency for the ultrasound beams steered within the region of interest, the second frequency being higher than the first frequency; - an image processor responsive to the ultrasound image data, which is adapted to identify a location of a high intensity region within the volumetric region, said region of high intensity having signal intensity at least two times higher than the average intensity of the ultrasound image; and - an interferer analyzer coupled to the image processor and the transducer frequency controller, said analyzer is adapted to adjust at least one of the beam steering parameters of the beams steered within the region of interest, when the second frequency is above a first threshold frequency value derived from the location of the high intensity region with respect to the steering angle. - a probe having an array of CMUT transducers, which array has a pitch value (p) in at least one of azimuth and elevation dimensions, which array is adapted to steer ultrasound beams in a variable frequency range over the volumetric region; - a beamformer coupled to the array and adapted to control the ultrasound beam steering and to provide an ultrasound image data of the volumetric region, wherein the beams are steered within at least one of azimuth and elevation steering angles; - a transducer frequency controller coupled to the beamformer and adapted to vary operation frequencies of the CMUT transducers within the frequency range, which frequency controller is arranged to set the operation frequency to a first frequency for the ultrasound beam steered in the volumetric region and to change the operation frequency to a second frequency for the ultrasound beams steered within the region of interest, the second frequency being higher than the first frequency; - an image processor responsive to the ultrasound image data, which is adapted to identify a location of a high intensity region within the volumetric region, said region of high intensity having signal intensity at least two times higher than the average intensity of the ultrasound image; and - an interferer analyzer coupled to the image processor and the transducer frequency controller, said analyzer is adapted to adjust at least one of the beam steering parameters of the beams steered within the region of interest, when the second frequency is above a first threshold frequency value derived from the location of the high intensity region with respect to the steering angle.