Atlas Of Dermatologic Ultrasound Instant

: Also hyperechoic but slightly less so than the epidermis due to collagen content.

: Standard dermatologic exams require probes of at least 15 MHz ; ultra-high frequency (UHFUS) can reach up to 70 MHz for viewing minute structures like hair tracts. Layer Echogenicity : Epidermis : Appears as a bright, hyperechoic line. Atlas of Dermatologic Ultrasound

: Ultrasound helps measure the depth (ultrasonographic Breslow index) and check for nearby satellite metastases. : Also hyperechoic but slightly less so than

: Appears dark (hypoechoic) because it is mostly fat lobules. Atlas of Dermatologic Ultrasound