| abstract |
A helical ultrasound tomography method and system. According to the method, insofar as an ultrasonic probe performs uniform displacement along a Z axis, by means of the synchronous rotation of the ultrasonic probe or the cyclic switching of an emission array element in the ultrasonic probe, time-varying trajectories, in a three-dimensional space, of the position of the emission array element at various ultrasonic wave emission moments are distributed along a helical line or a curved line; and during the process of the ultrasonic probe performing uniform displacement along the Z axis, the ultrasonic probe emits an ultrasonic wave and receives and collects echo data, and after the collected echo data is stored and the data is post-processed, ultrasound tomography of an object to be inspected can be realized. A helical ultrasonic tomographic three-dimensional scanning method and a corresponding system obtained by means of controlling a change in the position of an emission array element during an ultrasonic scanning process can realize rapid, continuous and uninterrupted data acquisition, and can ensure that a higher spatial resolution is obtained in the Z-axis direction; and multi-layer redundant data can be utilized to increase the signal-to-noise ratio of an image. |