New tissue mimicking materials for ultrasound phantoms

A phantom of tissure-equivalent material is important for quality control of an ultrasound diag -nostic equipment. This paper deals with polyure -thane gel and oil gels for the tissure-equvalent materials. The sound velocities of the materials are from 1450 to 1550 m/s and the attenuations are less than 0.4 dB/cm MHz. The attenuation constant of the materials is adjustable by dipersing suspended powder in the matrices. The materials are stable in their physical properties during the past a few month.