Mechanical spiral scanning ultrasonic imaging method

Abstract

The invention relates to a mechanical spiral scanning ultrasonic imaging method. An ultrasonic probe is installed on a spiral drive mechanism; the ultrasonic probe is driven by the spiral drive mechanism to simultaneously conduct rotation motion and front-and-back linear motion; the ultrasonic probe successively transmits and receives ultrasonic beams to conduct spiral scanning; image data acquired through spiral scanning are sequentially recorded; any image datum in the image data is optionally chosen as a start point; the image data are grouped according to the rotation period of the ultrasonic probe; each image datum in each group of image data is identified according to angles; an annular two-dimensional image is formed by any selected group of image data; rectangular longitudinal section images are formed by all image data which have the same angle and have 180-degree differences in all groups; all annular two-dimensional images are overlaid according to the time sequence to form a three-dimensional image. Therefore, the fidelity of the images is higher, the conditions of lesion tissue are more intuitively, more clearly and more accurately expressed, and diagnose can be more easily and more accurately conducted through the images.

Description

technical field [0001] The invention relates to an imaging method, in particular to a mechanical helical scanning ultrasonic imaging method. Background technique [0002] The existing mechanical scanning ultrasound imaging methods mainly fall into three categories: (1) mechanical straight line scanning; (2) mechanical sector scanning; (3) mechanical rotary scanning. [0003] Mechanical straight line scanning back and forth is mainly realized by means of gear transmission, pull wires, guide rails, etc. It is mainly used for two-dimensional longitudinal section imaging. To achieve three-dimensional stereoscopic images, array probes are required. Array probes are not only costly, but also large in size. It is difficult to apply to scanning imaging in patient's body cavity (such as intestinal tract, throat, etc.). [0004] Mechanical sector scanning is mainly realized by means of gear transmission, wire drawing, etc. It is mainly used for two-dimensional sector imaging. To real...

AI Technical Summary

Problems solved by technology

[0003] Mechanical straight line scanning back and forth is mainly realized by means of gear transmission, pull wires, guide rails, etc. It is mainly used for two-dimensional longitudinal section imaging. To achieve three-dimensional stereoscopic images, array probes are required. Array probes are not only costly, but also large in size. Difficult to apply to scanning imaging in patient body cavities (such as intestines, throat, etc.)

[0004] Mechanical sector scanning is mainly realized by means of gear transmission, wire drawing, etc. It is mainly used for two-dimensional sector imaging. To realize three-dimensional stereoscopic images, array probes are also required. Array probes are not only costly but also large in size, making it difficult to apply Scanning imaging inside a patient's body cavity (e.g. bowel, throat, etc.)

[0005] Mechanical rotation scanning realizes circular scanning through mechanical rotation, and is mainly used for two-dimensional circular images. To realize three-dimensional stereoscopic images, array probes are also required. Array probes are not only expensive, but also large in size, which is difficult to apply to patients Scanning imaging inside body cavities (e.g. intestines, throat, etc.)

[0006] If the mechanical straight line scanning back and forth is simply combined with the mechanical rotation scanning, the three-dimensional stereoscopic image can also be realized. However, the working method of such a combined structure is: first rotate a circle and scan the image in a circle at the same time; Step by one ring pitch, then rotate for one circle while circularly scanning for imaging, then rotate for a while and scan for static, third time rotate for one circle while circularly scanning for imaging, rotate for static scanning for static, and linearly step for one ring pitch... The three-dimensional solid formed The image is superimposed by multiple discontinuous circular sections, and the discontinuities cannot accurately reflect the condition of the diseased tissue; when performing two-dimensional longitudinal section imaging, this problem also occurs; in addition, the mechanical linear back-and-forth scanning and mechanical rotation scanning are simple There are still many defects in the ground combination: mechanical rotation and linear stepping are constantly started and paused, and the speed at the beginning and end is uneven; the mechanical transmission mechanism has elasticity and delay, and the position of the probe is not accurate

Intermittent imaging scans with inaccurate time-to-position correspondence

These all affect the accuracy of scanning imaging, resulting in distortion and decline of image quality.

Images