Table 3.

Summary of the main characteristics of the acoustic field during high intensity focused ultrasound (HIFU) treatment for different exposure parameters

Exposure	Acoustic power	Maximum absolute pressure	Maximum magnitude of intensity	Location
	W	MPa	W/cm2
NFD0.8, 0.6 J	4.00	32.0	25,778	Dermis
NFD0.8, 0.4 J	2.67	26.1	17,137	Dermis
NFD1.3, 0.5 J	3.33	22.9	13,284	Dermis
NFD1.3, 0.3 J	2.00	17.7	7970	Dermis

Time of single exposure was equal to 0.15 s and it was the same for all HIFU treatments

NFD nominal focal depth