| 摘要 |
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 tissue. In the embodiment claimed in this divisional application, the phantom is comprised of an open-cell foam matrix for generating back-scatter from an ultrasonic wave, and has at least two hollow regions which do not generate back-scatter from the ultrasonic wave. The hollow regions are separated and are not aligned within the flow phantom structure. Other phantoms disclosed and claimed in related U.S. Pat. No. 5,560,242 include a movable member, such as a movable belt having a density different than that of the surrounding foam. The geometric relationship between the moving member and the surrounding open-cell foam material provides a quantitative basis of assessing the beam forming characteristics of the imager as well as the ability of the system to separate the Doppler shifted signal from the stationary clutter signal. In another embodiment, a rotating disk has similar material as the belt such that differing blood flow rates between adjacent blood vessels can be simulated for ultrasonic imaging.
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