THE SOUND SPEED CORRECTION METHOD AND APPARATUS BASED ON LATERAL SPATIAL FREQUENCY ANALYSIS

摘要

PURPOSE: A device and a method of estimating a lateral spatial frequency characteristics based optimal ultrasound speed provide an image with improved spatial resolution, contrast, and a low noise level by estimating the optimal ultrasound speed to be used for image restoration. CONSTITUTION: An ultrasound speed estimating device includes an envelope detection part (200) detecting an envelope from in-phase components and quadrature components of beam focusing in a specific ultrasound speed; a kernel part (210) outputting the size of a lateral spatial frequency added along an axis direction of an image from the envelope by lateral frequency; and a focusing calculation part (220) calculating the focusing corresponding to the specific ultrasound speed by adding the lateral frequency outputted from the kernel part. The ultrasound speed estimating device estimates an ultrasound speed corresponding to the largest focusing as an optimal ultrasound speed after calculating the focusing of multiple ultrasound speeds selected in a predetermined ultrasound speed section. [Reference numerals] (200) Envelope detection part; (210) Kernel part; (213) Normalization part; (220) Focusing calculation part; (230) Interpolation part; (240) Smoothing part; (250) Speed estimation part; (AA) Beam-focused I/Q data