Ultrasonic CT imaging system based on improved ray tracing method

Abstract

The invention relates to an ultrasonic CT imaging system based on an improved ray tracing method. The ultrasonic CT imaging system comprises a full-enclosed ultrasonic transducer, a signal acquisitionmodule and a data processing and imaging module. When a processor in the data processing and imaging module executes computer programs stored in a memory, an implementation method comprises the following steps that human organs are scanned based on the full-enclosed ultrasonic transducer, and the transit time of sound waves is measured; the initial sound velocity distribution of a target is reconstructed; B-mode ultrasound imaging is conducted based on the sound velocity distribution of the target; the boundary information of organic tissues is extracted from B-mode ultrasound images; propagation paths of the sound waves are updated iteratively; and the sound velocity distribution of the target is updated iteratively. Compared with a traditional imaging scheme, while the ultrasonic CT imaging accuracy is ensured, the calculation amount is reduced, the reconstruction speed is improved, and the accuracy of the B-mode ultrasound images and the edge definition in an ultrasonic CT imagingresult are improved.

Description

technical field [0001] The invention relates to an ultrasonic CT imaging system, in particular to an improved ray tracing method, and a system based on the algorithm for ultrasonic CT imaging using breast tissue boundary information extracted from B-ultrasound. Background technique [0002] Ultrasound CT is a new method of ultrasonic tomographic image reconstruction. Its basic principle is to use ultrasound to scan the breast, and extract effective information such as transit time from the ultrasound signal to analyze the acoustic properties of breast tissue, such as the distribution of sound velocity. reconstruction. Due to its high resolution and no radiation, it has broad application prospects in the fields of non-destructive testing and early screening of breast cancer. [0003] The traditional ultrasonic CT imaging process can be divided into three steps: scan the breast with a full-surround probe and extract the transit time from the acoustic signal; reconstruct the p...

AI Technical Summary

Problems solved by technology

The ultrasonic propagation path obtained by this scheme is close to the result of the traditional ray tracing method, but the calculation amount is reduced by more than 90%.

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