| 摘要 |
PROBLEM TO BE SOLVED: To achieve highly accurate displacement vector measurement of actual time on the basis of a beam forming method which can minimize an error due to tissue displacement during generation of one echo data frame without requiring time for beam forming.SOLUTION: A displacement measurement device includes: driving and processing means which generates an ultrasonic echo data frame in each of a plurality of time phases on the basis of ultrasonic echo data obtained by scanning a measurement object with an ultrasonic beam in a rectangular coordinate system including orthogonal axes in an axial direction and a lateral direction; and a data processing part which calculates a displacement vector component on each position in the axial direction and the lateral direction by solving simultaneous equations obtained on each position for the ultrasonic echo data generated in the plurality of time phases for carrier frequencies and phases in the axial direction and the lateral direction or one of a single eight-quadrant spectrum, a single four-quadrant spectrum and a single half-band spectrum. |
