This atlas describes andillustrates a novel approach, referred to as full breast ultrasonography (FBU),that represents a challenge to conventional breast imaging diagnosis. Thecoverage encompasses examination technique, diagnostic criteria, the imagingfeatures of a wide variety of lesions, and role in follow-up. FBU involves anatomicultrasound scanning based on the ductal echography technique proposed by MichelTeboul, supplemented by Doppler and real-time sonoelastography. The approach offersa variety of advantages. Compared with MRI it has a lower cost, wider availability,better resolution, and improved correlation with anatomy. Compared withmammography it has the benefits of absence of irradiation and pain, applicabilityin all cases, and better overall accuracy. Furthermore, the standardizedtechnique of acquisition and interpretation means that it is suitable as a screeningtest, unlike classic ultrasonography. FBU is applicable in ultrasound BI-RADSassessment and is of value in depicting both benign and malignant conditions. It can be recommended as a first-line method of diagnosis and for the follow-upof treated breasts, regardless of the patient's age, sex, or physicalcondition.