Fig. 4
From: The polony phantom: a cost-effective aid for teaching emergency ultrasound procedures
a The ultrasound image generated from a regular pork polony. This is an excellent product to create a phantom for training. b The ultrasound image generated from a processed mini-ham that contains larger pieces of muscle tissue. The image is poorer than that of a more highly refined product. c The ultrasound image generated from a chicken polony. The images are poor because the meat is less finely ground and less homogenous. Some products, such as this one, are not useful for creating phantoms