摘要:
Disclosed is a displacement estimating method of iteratively estimating displacement using ultrasound signals, and the method includes: transmitting, to a medium, at least one of the ultrasound signals to scan the medium; receiving the ultrasound signal reflected from the scanned medium; calculating a size of a window; calculating a border of the window based on the calculated window size; estimating displacement for each depth of the ultrasound signal, using the window with the calculated border; warping the ultrasound signal based on the estimated displacement; and guiding convergence of the method using the warped ultrasound signal so that a correlation value of the ultrasound signal is larger.
摘要:
Disclosed is a displacement estimating method of iteratively estimating displacement using ultrasound signals, and the method includes: transmitting, to a medium, at least one of the ultrasound signals to scan the medium; receiving the ultrasound signal reflected from the scanned medium; calculating a size of a window; calculating a border of the window based on the calculated window size; estimating displacement for each depth of the ultrasound signal, using the window with the calculated border; warping the ultrasound signal based on the estimated displacement; and guiding convergence of the method using the warped ultrasound signal so that a correlation value of the ultrasound signal is larger.
摘要:
A temperature estimation method including: receiving a scan signal generated by scanning the target region using the ultrasound signal, and estimating, based on the scan signal, an echo shift which is an amount of change in time required for the ultrasound signal to pass through the target region, the time changing depending on the temperature in the target region; estimating, based on the estimated echo shift, a strain which is an apparent change rate of a travel distance required for the ultrasound signal to pass through the target region, the travel distance changing depending on the temperature in the target region; estimating, based on the estimated strain, a strain rate which is a temporal change rate of the strain; and estimating the temperature in the target region corresponding to the strain and the strain rate, based on a predetermined relationship between a strain, a strain rate, and a temperature.
摘要:
To detect a malignant tumor more accurately by detecting a feature of a cancerous tumor pulsation more appropriately, a tissue malignant tumor detection method according to the present invention includes: segmenting, into blocks, a region scanned with ultrasound (S100); estimating, based on a scan signal, a tissue pulsation that is a temporal variation in tissue displacement derived from pulsations of a tissue (S101); extracting, for each of the blocks, pulsation-related features that are parameters related to the tissue pulsation (S103); calculating distribution characteristics of the pulsation-related features for each of the blocks (S104); and classifying, based on the distribution characteristics, whether or not each of the blocks is a malignant block that is a block including the malignant tumor (S105).