An ultrasound phantom is disclosed which can be used in an imaging method that quantifies data in decibels based on the log of a ratio of the signal intensity between adjacent regions within the ultrasound phantom. A variety of flow phantoms are disclosed that can simulate the flow of blood within surrounding...http://www.google.fr/patents/US5886245?utm_source=gb-gplus-shareBrevet US5886245 - Ultrasonic system evaluation phantoms
