Experience of preventive maintenance of OUR-QGD whole body gamma knife
Release date: 2006-08-15 OUR-QGD type full body gamma knife preventive maintenance experience ------------------------------------- -------------------------------------------
Organic materials: also known as organic polymer materials, generally by C, H, O and other elements of the relative molecular weight of more than 100,000 (of course, there are other elements, such as S or P, etc.) generally speaking, solubility (divided into two kinds of swelling and dissolution), thermoplasticity (high temperature into the kind of viscosity) And thermosetting (seemingly low temperature and return to solid state), strength characteristics (than carbon or steel and other materials made of general strength is about twice its strength), electrical insulation, general organic materials have rubber, cellulose, protein, starch, high polymer, etc.
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Organic Raw Material,Organic Material,Phosphoric Acid Tripropyl Ester,1 2-Dihydroxypropane Shandong Chenyi Environmental Protection Technology Co.,Ltd , https://www.chenyichem.com
The OUR-QGD full-body gamma knife uses a stereotactic system to rotate 30 gamma rays to the tumor site, and the tumor cells are killed by repeated high-dose irradiation. The relevant equipment must be in a safe and reliable state during treatment. Engineering and technical personnel are the quality assurance of the equipment, providing them with essential technical support. During the use period, the concept of traditional passive maintenance should be changed, and necessary preventive maintenance should be carried out in due course. How to maintain the whole body gamma knife has been described in detail in the "OUR-QGD stereotactic gamma ray systemic system product manual". We have used the whole body gamma knife for more than a year and have accumulated some experience in preventive maintenance. The report is as follows.
First, timely measurement of the focus position of the whole body gamma knife The focal position of the whole body gamma knife should be consistent with the irradiated lesion to achieve the purpose of treatment. Mechanical wear, deformation, looseness, or displacement of the zero switch can all result in a change in focus position. It is best to measure and check the focus position (X, Y plane and X, Z plane) every 1 to 2 months, and the method of film taking is simple and easy. The focus position should be detected after adjusting the 3D bed mechanical part or the zero position switch.
Second, regular inspection of safety protection devices Emergency stop switch, y-axis limit switch, stop switch, shield door anti-extrusion switch and other safety protection devices are emergency tools in the treatment of abnormal conditions, these safety protection devices under normal use It is hardly used, and if it is unreliable or damaged, it is not easy to be discovered by the operator. We recommend repeating the test 2 to 3 times for at least 1 to 2 months and find that the problem is handled immediately.
3. Periodically discharge the UPS lead storage battery. In the long-term non-stop area of ​​the UPS, the UPS lead storage battery has been working in the floating state. The battery is equivalent to the static storage state. If the storage time is exceeded, the internal resistance of the battery may become larger or Damage, resulting in reduced load capacity or unloading, so every 3 to 4 months need to manually cut off the mains, let the UPS work, the discharge depth is about 50% activation treatment. When the lead battery is discharged, it also detects the working condition of the UPS inverter circuit, which can be described as two things.
4. Regularly dusting the interior of the electrical equipment and dust on the internal circuit board, the more the more, the whole circuit board will be covered with a very uniform thermal insulation layer, which prevents the heat from being dissipated inside the machine. Can cause a short circuit and cause a machine malfunction. It is necessary to regularly remove dust from the machine. The computer and the workstation can be dusted once a year, the display can be used once every six months, and the electric control cabinet can be used once every 3 to 4 months. The dust removal tool has been introduced in the random file. Dust removal shall be carried out after power off. Before dusting, record the position of each switch in the machine and check it at the end of dust removal. When removing the dust of the picture tube, avoid using liquid such as alcohol to wipe the test. Otherwise, the graphite layer of the tube may be damaged and cause malfunction. The power box can be removed from the cover to remove dust.
5. Keep the treatment room fresh. Gamma rays ionize the oxygen in the air to produce ozone. Ozone can cause harm to the human body, and ozone can accelerate the aging of plastics. Therefore, the conditional unit can place the negative pressure bag outside the machine room, and the exhaust fan air inlet is preferably placed at the bottom of the wall (the effect is better than the top of the wall), and the exhaust fan is opened for a long time.
—— Information from: Southern Medical Device Network