Patent ID: 8328723

Claim:
An ultrasound diagnosis apparatus having an ultrasound probe in which a plurality of transducer elements are arrayed, and which converges and radiates an ultrasound on a patient and detects a reflection wave thereof; and imaging a tomogram of the patient, using the reflection wave, the apparatus comprising: a cross correlator for performing a pattern matching between the tomogram imaged with one frame and the tomogram imaged with another frame and operating a displacement signal, the pattern matching being performed by taking a cross correlation through application of a first displacement function for expressing a displacement such that a place becomes closer to a body surface at a shallow depth and a displacement such that a place becomes farther from the body surface at a greater depth; and a tissue expansion detector for performing a second pattern matching between the displacement signal and a second displacement function for expressing a displacement form caused by a partial tissue expansion of the patient, wherein a tissue expansion generated at a part of the patient is extracted from the second pattern matching.