Method of calibrating ultrasound velocity

摘要

A method of calibrating ultrasound velocity is provided, including receiving an ultrasound non-delayed data set; performing a beam-forming process on the ultrasound non-delayed data set with a plurality of velocities to generate a plurality of aperture images; performing a Mean Absolute Percentage Error (MAPE) process to obtain a velocity and two sub-aperture images corresponding to an MAPE value located within an MAPE range; finding a first sub-aperture and a second sub-aperture corresponding to the two sub-aperture images, generating a first aperture image and a second aperture image with corresponding velocity; performing the MAPE process on the first aperture image and the second aperture image to generate an image error corresponding figure having an error curve; finding a trend curve according to the error curve; and finding a lowest point of MAPE value on the trend curve and finding a velocity correspondingly to obtain the calibrated ultrasound velocity.

主权项

1. A method of calibrating ultrasound velocity to obtain a calibrated ultrasound velocity for imaging, the method comprising the following steps:
(a) receiving an ultrasound non-delayed data set; (b) performing a beam-forming process on the ultrasound non-delayed data set with a plurality of velocities defining a plurality of sub-apertures of a probe to generate a plurality of sub-aperture images; (c) performing a Mean Absolute Percentage Error (MAPE) process on the sub-aperture images to obtain MAPE values defining a MAPE range, obtaining an intermediate calibration velocity and two calibration sub-aperture images corresponding to a pre-selected MAPE value located within said MAPE range; (d) selecting a first sub-aperture and a second sub-aperture corresponding to the two calibration sub-aperture images, performing the beam-forming process on the ultrasound non-delayed data set with the intermediate calibration velocity to generate a first aperture image corresponding to the first sub-aperture and a second aperture image corresponding to the second sub-aperture; (e) utilizing the first aperture image and the second aperture image to generate an image error figure having an error curve; (f) finding a trend curve according to the error curve; and (g) finding a lowest point on the trend curve and finding a velocity corresponding to the lowest point to obtain the calibrated ultrasound velocity, wherein the lowest point on the trend curve shows the lowest MAPE value.