SPECIMEN INFORMATION ACQUISITION APPARATUS

摘要

The present invention relates to formation of an image indicating viscoelastic characteristics in a specimen by a simple method.;Stepwise pressurization in which, after pressure is instantaneously increased to a certain pressure value, the certain pressure value is kept for a certain time period is performed to measure the variation with time of strain distribution in the specimen and to calculate a stress from strain distribution at a saturation measurement time when the effect of the viscosity of a viscoelasticity measurement reference layer is saturated, thereby evaluating the modulus of elasticity and the coefficient of viscosity of a body tissue.

主权项

1. A specimen information acquisition apparatus that transmits elastic waves to a specimen and receives the elastic waves reflected in the specimen to acquire information in the specimen, the specimen information acquisition apparatus comprising:
a conversion element configured to convert the received elastic waves into an electrical signal; a reference layer provided between the conversion element and the specimen, a modulus of elasticity of the reference layer being known; a measurement unit configured to measure a strain in the specimen and a strain of the reference layer when pressure is applied on the specimen and the reference layer by using the electrical signal; and a calculation unit configured to calculate a coefficient of viscosity of the specimen by using the modulus of elasticity of the reference layer, a variation in the strain in the specimen, and a saturation value of the strain of the reference layer.