Kimme-Smith C, Hansen M, Bassett L, Sarti D, King W 3rd.
Department of Radiological Sciences, University of California, Los Angeles School of Medicine.
Radiographics. 1985 Nov;5(6):955-69
In order to avoid serious pitfalls in the diagnosis of breast masses by sonography, it is important to understand the effects of technical factors such as focal zone placement and time gain compensation.