Figure 4
From: Improvement of light penetration in biological tissue using an ultrasound-induced heating tunnel
(a) The ultrasound B-mode images acquired during HIFU heating with different parameters (4–9 MPa, 100 Hz pulse repetition rate, 7600 cycles, 50% duty cycle, 60 s). (b) The backscattering signal intensity within heating area measured from ultrasound B-mode images.
