Very low scatter liquid and solid tissue mimicking material for

Details Very low scatter liquid and solid tissue mimicking material for Very low scatter liquid and solid tissue mimicking material for

1995-05-25

1997-04-29

Noland, Thomas P.

Measuring and testing

Instrument proving or calibrating

Apparatus for measuring by use of vibration or apparatus for...

738664, 2523151, G01N 3700, G01N 2906

Patent

active

056251378

ABSTRACT:
A tissue mimicking material for use in ultrasound scanner phantoms has a very low acoustic backscatter coefficient. The tissue mimicking material has the ultrasonic speed and attenuation characteristics of human tissue, with a backscatter coefficient of about 40 dB below that of human liver tissue. The tissue mimicking material may be in liquid or solid form. A component in both the liquid and solid forms is a filtered aqueous mixture of large organic water soluble molecules and emulsion of fatty acid esters. This mixture may be based on a combination of evaporated whole milk and water. The material also includes a hydroxy compound, such as n-propanol, to control the ultrasonic speed of propagation through the material. A preservative from bacterial invasion, such as thimerosal, is also preferably included in the material. The solid form of the material contains the same material as the liquid form, with a very pure gel-forming material included to form a solid material. The tissue mimicking material may be included in an ultrasound phantom container with solid scattering particles and/or test objects incorporated therein. The use of scattering particles allows a very broad range of relative backscatter levels to be achieved in ultrasound test object phantoms incorporating the tissue mimicking material of the invention.

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