research Ultra-High-Frequency Ultrasound as an Innovative Imaging Evaluation of Hyaluronic Acid Filler in Nasolabial Folds
This study observed that using ultra-high-frequency ultrasound with 70 MHz probes effectively assessed the distribution of hyaluronic acid fillers and improvements in nasolabial fold wrinkles, with significant changes in dermal thickness and wrinkle scores maintained 24 weeks after treatment.