The SONOtrain™ SONOtrain™ Breast with Tumors is a realistic reproduction of a breast made from ultrasound material with three tumors for realistic punctures and biopsies. The material of the SONOtrain™ trainer simulates the feel of real soft tissue for carrying out palpations and injections and shows realistic texture and echogenicity on ultrasound images. The SONOtrain™ trainer is easy to use as a teaching tool for basic training and for improving dexterity and hand-eye coordination skills.