Medical ultrasound scanner is a non-invasive examination device widely used in the medical field. It utilizes the physical properties of ultrasound to provide non-invasive and painless high-definition images of internal organs of the human body. With the continuous development of technology, medical ultrasound scanners have made significant progress in imaging technology. Among them, nonlinear imaging technology has become one of the research hotspots. This article will introduce the technological progress of nonlinear imaging using medical ultrasound scanners.

1、 Principles of Nonlinear Imaging

Nonlinear imaging is an imaging method based on the nonlinear effects of ultrasound propagation in human tissues. When ultrasound propagates in human tissues, the waveform, frequency, and amplitude of ultrasound change due to the scattering and absorption of ultrasound by the tissue. By measuring these changes, information reflecting the nonlinear characteristics of the organization can be obtained. At present, common nonlinear imaging technologies include ultrasonic frequency shift imaging, ultrasonic backscatter imaging, and sound intensity imaging.

2、 Ultrasonic frequency shift imaging

Ultrasonic frequency shift imaging is an imaging method based on changes in ultrasonic frequency. When ultrasound propagates in human tissues, the frequency of ultrasound will shift due to the nonlinear effects of the tissue. By measuring this frequency shift, information reflecting the nonlinear characteristics of the organization can be obtained. Ultrasound frequency shift imaging has high resolution and contrast, and can clearly present the details and features of tissues. At present, ultrasound frequency shift imaging has been applied to the detection and diagnosis of organs such as the liver and kidneys.

3、 Ultrasonic backscatter imaging

Ultrasonic backscatter imaging is an imaging method based on ultrasonic backscatter signals. When ultrasound propagates in human tissues, some of the energy is scattered back by the tissue. Due to the nonlinear effects of the organization, the scattered signals have complex waveforms and frequency variations. By analyzing these signals, information reflecting the nonlinear characteristics of the organization can be obtained. Ultrasonic backscatter imaging has high sensitivity and specificity, and can accurately detect small lesions and abnormal tissues. At present, ultrasound backscatter imaging has been applied to the detection and diagnosis of organs such as the breast and thyroid.

4、 Sound intensity imaging

Sound intensity imaging is an imaging method based on changes in ultrasonic intensity. When ultrasound propagates in human tissues, the intensity of ultrasound will decay or increase due to the nonlinear effects of the tissue. By measuring this intensity change, information reflecting the nonlinear characteristics of the organization can be obtained. Sound intensity imaging has high contrast and resolution, which can clearly present the structure and function of tissues. At present, sound intensity imaging has been applied to the detection and diagnosis of organs such as the heart and blood vessels.

5、 Technical Challenges and Prospects

Although significant progress has been made in the application of nonlinear imaging technology in medical ultrasound scanners, there are still some technical challenges and prospects. Firstly, the accuracy and stability of nonlinear imaging technology need to be further improved. Due to the complexity and diversity of human tissues, there are differences in the nonlinear effects of ultrasound among different tissues. How to accurately distinguish between normal and diseased tissues remains a challenge. Secondly, the real-time and convenience of nonlinear imaging technology need to be strengthened. Currently, most nonlinear imaging technologies require complex signal processing and data analysis processes, making it difficult to achieve real-time monitoring and convenient operation. In the future, efficient and stable algorithms and hardware devices can be developed to improve the real-time and convenience of nonlinear imaging technology. In addition, the popularity and standardization of nonlinear imaging technology need to be strengthened. At present, nonlinear imaging technology is still in the research stage and has not been widely applied in clinical practice. In the future, relevant training and educational activities can be carried out to improve the popularity and standardization of nonlinear imaging technology. At the same time, it is also necessary to strengthen international cooperation and exchange, and promote joint research and development of nonlinear imaging technology.

6、 Conclusion

The use of medical ultrasound scanners for nonlinear imaging is one of the important development directions in the field of medical imaging. By mastering the basic principles and methods of nonlinear imaging technology, Combining advanced technological means and research progress to improve and improve will have the potential to improve the accuracy of disease diagnosis and the quality of treatment evaluation, promote the improvement of medical diagnosis and treatment level and social development. Therefore, it is necessary to strengthen relevant research and application practices to continuously promote the progress and development of medical ultrasound scanners in the field of nonlinear imaging, and make greater contributions to human health. In summary, using medical ultrasound scanners for non Linear imaging is one of the important development directions in the field of medical imaging. In the future, further research and application practice are needed to promote technological progress and development, improve the accuracy of disease diagnosis and the quality of treatment evaluation, and make greater contributions to human health