Description: Module 1 in the Breast Review eCourse series begins with a discussion of transducer selection, including frequency, linear format, bandwidth, beam focusing, and contrast/spatial resolution. Ultrasound system controls are reviewed with an emphasis on receiver gain, output power, overall gain, time gain compensation, dynamic range, and focal zone placement. In addition, techniques of image optimization are considered. The Doppler section covers pulsed wave, color, power, and contrast Doppler. Common specialty applications such as dual and extended field-of-view imaging and harmonic, tissue harmonic, convex-linear, spatial compound, and 3D-multiplanar imaging are presented. The module concludes with a review of common artifacts including reverberation, refraction, attenuation, propagation speed, slice thickness, clutter, acoustic speckle, and system noise. Core Concepts: 90 min Focus Session: 70 min CME 1.75 SDMS CME