Ultrasound-mediated transdermal drug delivery of fluorescent nanoparticles and hyaluronic acid into porcine skin in vitro
Wang Huan-Lei1, 2, Fan Peng-Fei1, Guo Xia-Sheng1, Tu Juan1, †, , Ma Yong3, ‡, , Zhang Dong1
       

Confocal images showing penetration depth and concentration in skin samples exposed to 10-min ultrasound with different frequencies and amplitudes.