This ultrasound phantom is excellent for hands-on ultrasound training for guiding fine needle biopsies and cyst aspirations. This ultrasound phantom is excellent for hands-on ultrasound training for guiding fine needle biopsies and cyst aspirations. Develop your ultrasound skills while targeting multiple focal masses with a variety of ultrasound imaging characteristics. Contains a variety of mass sizes for training evolution; masses from 4–10 mm. The masses are present in both the central breast tissue as well as the Tail of Spence. Size: 18 x 13 x 5 cm, weight: 0.6 kg