Abstract: A discharge unit is connected to a power pad, a ground pad, and an I/O pad, and can discharge an electrostatic charge when an electrostatic pulse appears on any of the power pad, the ground pad, and the I/O pad. The discharge unit includes a first discharge unit and a second discharge unit, the first discharge unit is connected to the second discharge unit, the power pad, and the I/O pad, and the second discharge unit is connected to the ground pad and the I/O pad. The first discharge unit and/or the second discharge unit can discharge electrostatic charges on different pads, respectively.

Abstract: A three-dimensional ultrasound tomography method and system based on spiral scanning are provided. The method includes the following. (1) Collecting raw data: an emission array element is switched while a probe maintains a uniform linear motion, so that changes in trajectory with time of a position of an equivalent emission array element in a three-dimensional space show a spiral or a partial spiral, and echo data is received. (2) Pre-processing data. (3) Calculating coordinates of each equivalent emission array element. (4) Calculating coordinates of an imaging focus point. (5) Performing synthetic aperture focusing on each imaging focus point. (6) Post-processing data. The disclosure improves the principle of the imaging method, the design of the overall process, etc. Volume data containing information of continuous tissue layers is obtained through spiral scanning.

Abstract: A three-dimensional ultrasound tomography method and system based on spiral scanning are provided. The method includes the following. (1) Collecting raw data: an emission array element is switched while a probe maintains a uniform linear motion, so that changes in trajectory with time of a position of an equivalent emission array element in a three-dimensional space show a spiral or a partial spiral, and echo data is received. (2) Pre-processing data. (3) Calculating coordinates of each equivalent emission array element. (4) Calculating coordinates of an imaging focus point. (5) Performing synthetic aperture focusing on each imaging focus point. (6) Post-processing data. The disclosure improves the principle of the imaging method, the design of the overall process, etc. Volume data containing information of continuous tissue layers is obtained through spiral scanning.

Abstract: A spiral ultrasonic tomography imaging method and system are provided. The method is to use synchronous rotation of an ultrasonic probe or cyclic switching of emission array elements in the ultrasonic probe under the premise of a uniform displacement of the ultrasonic probe along the Z axis, so that the change trajectory of the positions of emission array elements over time in a three-dimensional space at each ultrasonic emission time is distributed along a spiral line or a curve. During the process of the uniform displacement of the ultrasonic probe along the Z axis, the ultrasonic probe emits ultrasonic waves and receives and collects echo data. The collected echo data is stored and post-processed to realize ultrasonic tomography imaging of an object. The spiral ultrasonic tomography three-dimensional scanning method and the corresponding system realize rapid continuous uninterrupted data acquisition to ensure that higher spatial resolution in the Z-axis direction.

Abstract: The disclosure is related to the technical field of functional imaging, and discloses an ultrasound CT image reconstruction method and system based on ray theory, wherein the method includes an ultrasound CT sound speed reconstruction method and an ultrasound CT attenuation coefficient reconstruction method based on ray theory; the ultrasound CT sound speed reconstruction method based on ray theory includes: (1) extraction of the difference in travel time; (2) calculate the ray path that the acoustic wave passes from the transmitting array element to the receiving array element; (3) solution for inverse problem: by using the quasi-Newton method to solve the path-slowness-time equation system, the speed reconstruction value vector of the object to be measured can be obtained.