The anatomic dissections were performed at the Department of Human Anatomy, Jilin University. Eighty lower extremities specimens of 40 adult cadavers were dissected, 28 of which were male and 12 were female. All the specimens were xanthoderm, and their age ranged from 42 to 76 years, height ranged from 158 to 185 cm, and weight ranged from 44 to 85 kg. After checking body donation documents, we confirmed that no disease or past surgical incisions were noted in the areas dissected. All measurements were made by vernier caliper (minimum scale, 0.02 cm).
The ultrasonic protocol was performed at the Department of Ultrasound, First Hospital of Jilin University; it was approved by the ethics committee of First Hospital of Jilin University, and all participants were given written informed consent. We enrolled 60 healthy adult participants who were >18 years old and volunteered to participate in the study (38 female and 22 male; height range, 155–185 cm; weight range, 44–83 kg). All images were acquired by using an ultrasound device (GE LOGIQ E9 Ultrasound System [GE Healthcare, Fairfield, CT]) with a 10-MHz transducer for all the participants.
The ultrasonic protocol was performed at the Department of Ultrasound, First Hospital of Jilin University; it was approved by the ethics committee of First Hospital of Jilin University, and all participants were given written informed consent. We enrolled 60 healthy adult participants who were >18 years old and volunteered to participate in the study (38 female and 22 male; height range, 155–185 cm; weight range, 44–83 kg). All images were acquired by using an ultrasound device (GE LOGIQ E9 Ultrasound System [GE Healthcare, Fairfield, CT]) with a 10-MHz transducer for all the participants.