Acoustic transmission losses and field alterations due to human scalp hair.
Hair is a potential transmission barrier for diagnostic and therapeutic ultrasound. We tested hair phantoms for insertion losses and field effects at 0.27-2.8 MHz. The negligible losses observed below 0.5 MHz suggest that, at such frequencies, hair removal is unnecessary for low-power imaging or therapeutic applications.
Raymond
Scott B
SB
Hynynen
Kullervo
K
D000162:Acoustics; D003198:Computer Simulation; D004735:Energy Transfer / Q000502:physiology*; D006197:Hair / Q000000981:diagnostic imaging* / Q000502:physiology* / Q000528:radiation effects; D006801:Humans; D066298:In Vitro Techniques; D008954:Models, Biological; D011874:Radiometry / Q000379:methods*; D012542:Scattering, Radiation; D014465:Ultrasonics; D014463:Ultrasonography