醫(yī)用直線加速器常見(jiàn)故障

醫(yī)用直線加速器常見(jiàn)故障醫(yī)院放射治療科醫(yī)用加速器類(lèi)型用于放射治療X射線及電子線：電子直線加速器，電子回旋加速器，電子感應(yīng)加速器質(zhì)子及重離子：等時(shí)性回旋加速器，同步加速器，直線加速器用于醫(yī)學(xué)成像PET(PositronEmissionTomography)：小型回旋加速器MV/KV成像：電子直線加速器課程內(nèi)容直線加速器結(jié)構(gòu)組成

直線加速器的控制系統(tǒng)直線加速器的設(shè)備狀態(tài)直線加速器的連鎖系統(tǒng)直線加速器的冷卻、氣體和真空系統(tǒng)直線加速器的運(yùn)動(dòng)系統(tǒng)直線加速器的束流系統(tǒng)直線加速器的影像系統(tǒng)直線加速器多葉光柵系統(tǒng)以下根據(jù)Elekta和Varian加速器維修手冊(cè)加速器的結(jié)構(gòu)加速器的結(jié)構(gòu)加速器的結(jié)構(gòu)加速器的結(jié)構(gòu)控制系統(tǒng)動(dòng)力系統(tǒng)運(yùn)動(dòng)系統(tǒng)影像系統(tǒng)安全控制系統(tǒng)EachcontrolareaisbuiltaroundaPCBrackwithbusinterconnections.Itconsistsoftwoindependentterminals,AandB,eachwithitsownpowersupplies.Itfunctionsindependentlyasregardsinterlocksandsafetycircuits,knownastheRemoteTerminalUnits(RTU)控制系統(tǒng)設(shè)備狀態(tài)設(shè)備狀態(tài)連鎖系統(tǒng)InterlocklevelsForeachsuperstatethereisafixedhardwarestate(enablingofcontactors)imposedoneachremoteterminalofthemachine.Therearefiveinterlocklevels:systeminterlockLTinterlockmovementsinterlockHTinterlockPRFinterlockSoftwareItemsandPartsItemsThecontrolsoftwaremonitorsandcontrolsthemachineviapotentiometers,switches,relays,andsupplies.ToaccomplishthisthesoftwareisorganizedintosmallpackagescalledItems.Allofthemachinemonitoringandcontrolcomponents,thatisswitches,potentiometers,relays,haveanItemassociatedwiththem.EachItemhasauniqueidentifyingnumberfrom0to599.PartsIneachoftheItems,therearemanyparameters.Theseconvertthedatavaluestoactualunits,thatisvolts,amps,anddegrees.Thereisastandardformatforthelayoutoftheseparameters,whicharecalledparts.ThesecanbeviewedwhenusingtheDisplayMachineItemcommand.SysteminterlockContactorAMachinestateEmergencyoffswitchesWaterpressureWatertemperaturePumptemperature水冷、氣體、真空真空系統(tǒng)水冷、氣體、真空水冷、真空、氣體水冷運(yùn)動(dòng)系統(tǒng)運(yùn)動(dòng)系統(tǒng)MovementsinterlocksContactorsStopmotorsandtouchguardTouchguardoverrideMachinestateResetmotorsMovementstopswitchesEmergencyshutdown運(yùn)動(dòng)系統(tǒng)準(zhǔn)直器和多葉光柵系統(tǒng)Varian加速器多葉光柵的結(jié)構(gòu)Elekta加速器的光學(xué)采樣定位系統(tǒng)分光鏡的作用多葉光柵葉