Ultrasonic probe calibration method

Abstract

The invention discloses an ultrasonic probe calibration method, which comprises the following steps that: obtaining the dead zone of an ultrasonic probe under a preset detection depth; putting the ultrasonic probe under a three-dimensional magnetic field, obtaining a first imaging graph obtained when the ultrasonic probe scans air, and a second imaging graph obtained when the acoustic lens of theultrasonic probe is in contact with the top end of a free sensor coated with coupling agent; according to a chromatic aberration specific value, independently selecting a first area with a longest continuous chromatic aberration and a second area with a longest continuous chromatic aberration on a corresponding circular arc, and calculating the intermediate value coordinate of the first area and the intermediate value coordinate of the second area; according to the intermediate value coordinate of the first area, the intermediate value coordinate of the second area and the dead zone, calculating the two-dimensional coordinate of the top end of a free sensor in the second imaging graph, and converting the two-dimensional coordinate into a three-dimensional coordinate to be detected; and according to the three-dimensional coordinate to be detected and free sensor, receiving the practical three-dimensional coordinate of a magnetic field, establishing a ternary equation set, and calculating the correction value of the ultrasonic probe under a three-dimensional magnetic field. By use of the method, measurement errors can be effectively lowered, and three-dimensional positioning accuracyis improved.

Description

technical field [0001] The invention relates to the field of ultrasonic technology, in particular to an ultrasonic probe calibration method. Background technique [0002] At present, ultrasonic diagnosis is an image diagnostic technology that uses ultrasonic waves to detect human tissue. It has the advantages of high resolution, good real-time performance, safety and non-invasiveness, and has been widely used in clinical image diagnosis. Ultrasound imaging has gradually become an important medical diagnostic technology. Ultrasound data of human tissues and organs are obtained through probes, and these data are processed to obtain more realistic three-dimensional ultrasound images of tissues and organs. Three-dimensional ultrasound has intuitive display and multi-angle observation. And other new features, superior to the traditional two-dimensional ultrasound, has important application value. [0003] Three-dimensional ultrasound imaging is obtained by three-dimensional reco...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a method for calibrating an ultrasonic probe to solve the technical problem of relatively large calibration errors of the existing ultrasonic probe. This method can effectively reduce the measurement error, thereby helping to improve the three-dimensional positioning accuracy

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