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118results about How to "Circumference small" patented technology

Medical proton synchrotron

The invention relates to a medical proton synchrotron which comprises the components of a first deflecting two-pole magnet, a second deflecting two-pole magnet, a third deflecting two-pole magnet, a fourth deflecting two-pole magnet, a fifth deflecting two-pole magnet, a sixth deflecting two-pole magnet, a seventh deflecting two-pole magnet and an eighth deflecting two-pole magnet, wherein the deflecting two-pole magnets are successively connected, and furthermore the first deflecting two-pole magnet is connected with the eighth deflecting two-pole magnet for forming an annular structure; a first long linear junction, a second long linear junction, a third long linear junction, a fourth long linear junction; a first miniature linear junction, a second miniature linear junction, a third miniature linear junction and a fourth miniature linear junction. According to the medical proton synchrotron, through utilizing the deflecting two-pole magnets with ultrahigh field strength and horizontal focusing and horizontal defocusing four-pole magnets, an envelope function is kept in a relatively low level, and furthermore the medical proton synchrotron has advantages of effectively improving acceptance degree of the proton synchrotron, increasing number of stored protons, increasing proton utilization rate and duty ratio, and shortening treatment time. Furthermore each magnet element in the medical proton synchrotron has relatively high strength for reducing perimeter of the whole synchrotron, thereby effectively utilizing the space of the medical proton synchrotron and furthermore reducing treatment cost.
Owner:SHANGHAI AIPUQIANG PARTICLE EQUIP

Single-window guided valve constriction system

The invention provides a single-window guided valve constriction system. The system comprises a catheter positioning device, a conveying device, an anchoring device and a tightening line, wherein theanchoring device comprises a plurality of anchoring parts; the catheter positioning device comprises a positioning tube, a window communicated with an inner cavity of the positioning tube is formed inthe side wall of the far end of the positioning tube, and the positioning tube moves to enable the window to face different positions of a targeting part; the conveying device conveys the plurality of anchoring parts to the different positions of the targeting part through the windows along the positioning tube; the anchoring device is used for sequentially fixing the anchoring parts penetratingthrough the window at the different positions of the targeting part; and the tightening line is used for serially connecting and tightening the plurality of anchoring parts fixed at the different positions of the targeting part, so that the perimeter of the targeting part is reduced. According to the single-window-guided valve contracting ring system, the positioning pipe moves to enable the window to face the different positions of the targeting part, then the anchoring parts are fixed to the different positions of the targeting part, then the targeting part is tightened through the tightening line, and therefore the effect of shortening the perimeter of the targeting part is achieved.
Owner:HANGZHOU VALGEN MEDTECH CO LTD

Low-temperature plasma generator with hexagon pipe-type structure

The present invention discloses a low-temperature plasma generator with a hexagon pipe-type structure. The low-temperature plasma generator comprises a copper rod, a generator cavity and a metallic mesh. The generator cavity is in the shape of a regular hexagon pipe, is made of quartz glass or corundum and is used as a medium in the middle of a discharging gap. The shape of the copper rod is the same with that of the generator cavity, and the copper rod is arranged in the generator cavity; both ends of the copper rod are sealed and fixed by positioning stoppers, and a through hole used for installing an aeration pipe is formed in each positioning stopper; and the metallic mesh wraps the outer surface of the generator cavity, and is used as a grounded negative electrode so as to ensure normal discharging, and fixes the generator cavity. During operation, the copper rod is connected to a high-voltage power source positive electrode by a positive electrode wiring head, the metallic mesh is connected to a high-voltage power source negative electrode by an external high-voltage wire, and after the generator is electrified, violet low-temperature plasma is generated in a slit between the copper rod and the generator cavity, and the generation amount of the low-temperature plasma is increased. When a plurality of low temperature plasma generators are connected in parallel, a space utilization rate can be improved, and the usage amount of medium materials and negative materials can be reduced.
Owner:HUAZHONG UNIV OF SCI & TECH
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