| 摘要 |
An edge between a tumor and a normal tissue is detected even when acoustic impedance and elasticity of those are not changed. An edge position of tissue is estimated by setting a plurality of estimation regions of an inspection object, detecting direction of motion of the inspection object within each estimation region, and computing the point of inflexion in the direction of motion. Moreover, these edge positions are overlapped on the cross-sectional images and thereby an operator can easily detect the edge lines.
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