An ultrasound system employs an ultrasound probe (31), a strain sensor(33) and a workstation (20). The ultrasound probe (31) includes an ultrasound transducer for acquiring ultrasound images (40) of an anatomical region. The strain sensor(33) is arranged on the ultrasound probe (31) to measure a longitudinal strain applied by the anatomical region to the ultrasound probe (31) as the ultrasound transducer acquires ultrasound images (40) of the anatomical region. The strain sensor(33) encircles a longitudinal axis of the ultrasound probe (31) and is spaced from the ultrasound transducers relative to the longitudinal axis of the ultrasound probe (31). The workstation (20) reconstructs an ultrasound volume (41) from the ultrasound images (40) acquired by ultrasound transducer, and responsive to the longitudinal strain measured by strain sensor (33), determines an axial force and/or 36 a bending force applied by the anatomical region to the ultrasound probe (31) as the ultrasound transducer acquires ultrasound images (40) of the anatomical region.
