Fig. 4From: The influence of low-intensity physiotherapeutic ultrasound on the initial stage of bone healing in rats: an experimental and simulation study a Wave propagation along the tissue. b Signal of receiver R8 positioned in the center of the fracture gap showing the time-of-flight of the first arriving signal (TOFFAS). c TOFFAS of receivers R1 to R15. d Sound pressure level (SPL) of receivers R1 to R15. e Root mean square (RMS) of receivers R1 to 15Back to article page