S free degree scanner of focus ultrasonic therapic devices

Abstract

A 5-freedom scan mechanism for focusing ultrasonic therapeutic apparatus is composed of cross bench and parallel scan mechanism. Said cross bench has X and Y guide tracks, and X and Y drive motors. Said parallel scan mechanism has 3 drive axles arranged in triangular mode, 3 slide blocks respectively sliding along said 3 drive axles up and down, and 3 connecting rods with same length, whose one end is rotary set installed to slide block and whose another end is a ball set connected to moving platform. Its advantages are simple structure, low cost and high precision.

Description

technical field [0001] The invention relates to a scanning mechanism for a high-intensity focused ultrasonic treatment machine. Background technique [0002] High-intensity focused ultrasound technology focuses low-density ultrasound energy outside the body on the tumor tissue in the body to achieve the purpose of "removing" the tumor without surgery, blood transfusion, radiation damage, puncture guidance, and no damage to the ultrasound. tissue or normal tissue outside the target area. Many units and organizations at home and abroad are conducting research in this area, representative examples are Imperial University, Boston University School of Medicine, and so on. [0003] Chinese invention patent CN98100283.8 "High Intensity Focused Ultrasound Tumor Scanning Therapy System" belongs to this type of device. By combining probes, multiple beams of ultrasound energy are brought together at a focal point. The tumor "resection" action is completed under the action of the ser...

AI Technical Summary

Problems solved by technology

This scheme applies the parallel mechanism to the high-intensity focused ultrasound treatment machine, and utilizes the characteristics of simple structure and high rigidity of the parallel mechanism, which greatly improves the manufacturing difficulty of the whole system and can greatly reduce the manufacturing cost of the scanning mechanism; for the parallel mechanism The problem of limited working space is made up by the standard cross table, which combines the advantages of two different types of mechanisms. However, in the specific implementation, the telescopic arm of the 3RPS mechanism used in this utility model still needs to be separated separately. Manufacturing, in the single-piece and small-batch production mode, the accuracy is still not easy to be guaranteed, and the manufacturing cost still has room for improvement. In addition, due to the difficulty in the design and implementation of the telescopic rod itself, the actual effective stroke of the telescopic rod is far smaller than the desired range. , the overall structure is still too bulky, difficult to install and maintain, the installation space of the measurement sensor in the corresponding controller design is relatively limited, and the arrangement of the travel limit switch is very difficult

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