HIFU technology used for cancer treatment(二)

The planetary deceleration technology can make the precision of scanning reach 0.01mm, and then use the medium and high grade B-ultrasound and Hifu piezoelectric crystal treatment system to form IC parts, it guides the positioning and target tissue, and implement the monitoring effect. For the first time, we introduced 3D reconstruction technology of ultrasound images in the HIFU treatment system, which can track and monitor the treatment effect in the real time through various methods, and adopt various forms of parameter compensation technology to ensure the safety and effectiveness of tumor treatment. 3D reconstruction technology and its arbitrary orientation cutting and browsing images can be:) Effectively solve the inconvenience caused by B-ultrasound in the Hifu piezoelectric crystal lighter only observing a sliced image; It is convenient to obtain three views of tumor or normal organs, measuring two-dimensional size and volume of the basin.

For tumors or other organs with a relatively chaotic growth direction,it is more accurate observation and measurement can be performed by cutting and browsing in any direction;) The length, width and height of the treated echo-enhanced area can be careful analysis of the two-dimensional size is the basis for confirming the therapeutic effect.it is real-time monitoring of grayscale and grayscale histograms by monitoring the grayscale.it is grayscale histograms of the treatment area in real time, the treatment effect can be effectively judged, and the adjustment of the treatment threshold can be provided to ensure the effectiveness of the treatment. By real-time tracking and monitoring of the target position ,the computer tracks and monitors the target position is in the real time, which compares the target position with the treatment plan, and automatically compensates according to the difference between the two to ensure accurate positioning and treatment. It is various forms of parameter compensation,Automatically control the output power and duty cycle according to the difference of treatment , About the organization and treatment order, so as to adjust and perform automatic compensation of x, Y, Z and other directions to ensure treatment. It is safe and effective.

At present, most of the domestic ultrasonic high focusing piezo adopts the method of prolongation treatment, and the treatment is immersed in the water. This treatment method requires the patient to adapt to the equipment. As a large-scale medical device, its design should be “people-oriented”, fully considerable for patients, it is allowing the person to comfortably receive treatment, while the use of dry water bladder avoids possible cross-infection. The inevitable problem is brought by the top-down ultrasound emission method that the complexity of the treatment mechanism is greatly improved. To make the treatment system adapt to the needs of various parts of cancer treatment, in addition to the treatment head, it is necessary to carry out multiple degrees of freedom. In addition to scanning and positioning, the treatment mechanism should also be able to perform combined movements in the multiple directions to improve the adaptability of the treatment system. it is necessary to increase the swing of the treatment head and whether the 250Khz hifu piezo ceramics technology can really go to the clinic and achieve industrialization. 

The primary problem to be solved is the therapeutic study of HIFU in biological tissues. One of the foundations for the treatment of tumors are using HIFU technology is that ultrasound can kill tumor cells, and some tumor cells are more sensitive to ultrasound than normal cells. Studies have shown that the mechanism of ultrasound acting on biological tissues mainly includes thermal effects, mechanical effects, cavitation effects, and immune responses and sensitization. This is a comprehensive and complex process. The results of the study indicate that the extent of damage to the HIFU ultrasound piezo ceramic device during treatment ,which depends on factors such as ultrasound frequency, acoustic power, pulse duration, tissue depth, and different tissue characteristics.

The results also show that under the same physical parameters, there are large differences in the biological focal lengths of liver tissue in the vitro. Therefore, while is continuing to test the face in vitro, it is necessary to conduct a large-scale animal test in the United Hospital, fully grasping the therapeutic ultrasound agent t of the high intensity focused ultrasound tumor treatment system, and fully understand the biological effects of HIFU, so as to effectively guide the focus. Clinical application of ultrasound therapy systems. Safety and effectiveness are the eternal themes. To make HI FU technology more developing, it is necessary to solve the therapeutic research of HIFU in the biological tissues, which is necessary for engineering and medical circles. Close integration will enable the clinical application of HIFU technology to be more widely promoted. In this respect,it is done a lot of basic research work and made great contributions to the further development of HIFU.