SunNuclear三維水箱特點(diǎn)課件

Advantagesofa3DCylindricalWaterScannerMaxTangMedicalPhysicistOutlineTG–106介紹以及數(shù)據(jù)采集

常見問題3DS水箱特點(diǎn)圓筒狀箱體設(shè)計(jì)AutoSetup自動(dòng)擺位功能TG-106Thistaskgroupwasformedtoreviewthephysicsofcommissioninglinearacceleratorsandtoprovideguidelinesandrecommendationsonproperselectionofdetector,phantom,andmethodstoreducemeasurementerrorsbelow±1%inbeamdataacquisition.AAPMTaskGroup106“Acceleratorbeamdatacommissioningequipmentandprocedures:ReportoftheTG-106oftheTherapyPhysicsCommitteeoftheAAPM,”MedPhys35(9):4186-4215,Sept2008.TG-106III.B.ScanningwatertankIII.B.1.PositioningandlabelingIII.B.2.ScannermovementIII.B.3.OrientationIII.C.ScanmechanismandmovementIII.C.1.ArraydetectorweightIII.C.2.SpeedandpositionaccuracyIII.C.3.HysteresisIII.C.4.CorrosionIII.E.DataacquisitionIII.E.1.ScanningparameterprotocolIII.E.2.SpeedIII.E.3.DelaytimeIII.E.4.SamplingtimeandsignalIII.E.5.Radiofrequencynoiseinterference足夠大的掃描范圍:Diagonalprofilesof40x40cm2withlateralbuildup5cm&overscans.Suggested75x75cm2intransversesize.Thehalffieldscanbeextended5cmpastthecentralaxis.相對較小體積的探頭:Ionchamberswithsmallvolumesaregenerallypreferred.Ref.detectorshallbeusedforremovingtheinstantaneousfluctuationsordriftsintheincidentbeamoutput.穩(wěn)定的掃描結(jié)果:Thechambershallscanwiththeleastamountofmovingparts;Orientthedetectormountsothatitprovidesthehighestresolution.Precautions:“Donotscanintheaxialdirectionofthedetector.”Adjustthestepsizetooptimizethetimeandaccuracy.TG106Highlights -ScannerinAcceleratorbeamdatacommissioning三維水箱探頭的選擇電離室---體積效應(yīng)半導(dǎo)體----劑量，能量，劑量率響應(yīng)Therearecon?ictingpublicationsontheuseofdiodedetectorsforbeamdataacquisition,hence,beforeusingadiodedetector,oneshouldcompareitwithionchambermeasurementstocon?rmitscorrectoperationandaccuracyindata.---AAPMTG106AAPMTG106AAPMTG106AAPMTG106電離室的體積效應(yīng)Volumnaveragingeffect

劑量高估劑量低估劑量準(zhǔn)確

“Detectororientationplaysanimportantroleinprofilesandpenumbrameasurements”

–TG106

AAPMTG106圓形水箱的優(yōu)勢，掃描方向的一致性Solution:Cylindricaldesignwithringdrivemechanism方形水箱掃描10x10的Cross-line和In-lineProfile的對比SNC125cTMSpecificationsTheSNC125cisoblongtoprovideasharperpenumbrawiththesamesignal.

Thischamberisdesignedlongertoworkinthe3DSCANNERwiththerotatingdiameterdrivetoalwayskeepthechamberintheidealorientation....it'salmostlikehavingthesignalofa0.125ccwithapenumbraclosertoamicrochamber.ChamberComparisonsIBACC13內(nèi)空腔截面SNC125C內(nèi)空腔截面PositioningreproducibilitywithAutoSetupDay1:AnexperienceduserpositionedthetankundertheLinac,filledit,usedAutoSetup,acquiredthreeprofiles,thenemptiedthetankandputittotheside.TheLinacwasusedclinicallyfortheday.Day2:Anoviceuser(trainedonlyonce,amonthbefore)putthetankbackintopositionundertheLinac,filledit,usedAutoSetup,andacquiredthesamethreeprofiles.Results:

Ifyoulookcloselyyoucanseethereare2profilesets,buttheprofilesoverlapalmostperfectly!AnexperienceduserandanoviceusergetrepeatableresultswithAutoSetup.(Note:noprocessingwasdonetotheseprofiles).3DS水箱的物理尺寸TankvolumelargeenoughtoensuresufficientbackscatterthusallowingthesystemtobeusedforRTPScommissioning.圓形水箱的優(yōu)勢之一，有效的利用空間。3D-Scanner166L65cm（使用offsetholder）VSSquareTank190L48cm40x40cmfieldatSSD100andDepths@30,20,10,5,1.53cm無需平移水箱即可以將40x40cmfield的Profile完整測量使用OffsetHold，3DS最大掃描范圍為65cm3DS運(yùn)動(dòng)方式3DS是目前唯一能實(shí)現(xiàn)AutoSetup自動(dòng)擺位功能的三維水箱傳統(tǒng)水箱擺位調(diào)整流程手動(dòng)調(diào)節(jié)水平：通過水平移動(dòng)探頭來調(diào)節(jié)水箱或移動(dòng)支架的水平手動(dòng)調(diào)節(jié)探頭移動(dòng)方向角度：將使用狹長beam，通過觀察探頭與beam邊界關(guān)系來旋轉(zhuǎn)水箱或Collimator。手動(dòng)將探頭調(diào)節(jié)至水面原點(diǎn)手動(dòng)或自動(dòng)調(diào)節(jié)探頭至beam的中心點(diǎn)3D-Scanner自動(dòng)擺位功能（AutoSet-Up）

自動(dòng)調(diào)節(jié)水箱水平自動(dòng)調(diào)節(jié)探頭到水箱中心位置

自動(dòng)尋找并調(diào)節(jié)水箱中心與Fieldcenter重合自動(dòng)調(diào)節(jié)水箱的掃描角度，使掃描方向與Field邊界平行或垂直自動(dòng)將尋找水面并將探頭移動(dòng)至水面作為原點(diǎn)使用電動(dòng)水平臺和水面探測器來實(shí)現(xiàn)自動(dòng)擺位

電動(dòng)水平臺與水箱無縫銜接四個(gè)步進(jìn)電機(jī)steppermotors水平調(diào)節(jié)點(diǎn)一個(gè)固定支點(diǎn)兩個(gè)可調(diào)節(jié):±5mmx和y軸水平移動(dòng)移動(dòng)范圍±30mm水面探測器自動(dòng)調(diào)節(jié)水平Autolevelingtakesthreewatermeasurementstodeterminethelevelingrequired自動(dòng)調(diào)節(jié)水平計(jì)算機(jī)會自動(dòng)計(jì)算出需要水平水箱需要調(diào)節(jié)的角度自動(dòng)尋找BeamCenter3DS可以通過掃描數(shù)據(jù)來確定BeamCenter.調(diào)節(jié)水箱中心Movement(±)30mm確定Beamcenter之后，計(jì)算機(jī)會控制電動(dòng)平臺在X，Y軸的方向平移。使水箱中心與Beamcenter重合自動(dòng)擺位（AutoSetup）帶來的好處AutoSetup可以將水箱的擺位時(shí)間從1~2個(gè)小時(shí)縮短至10~20分鐘。AutoSetup的過程僅僅需要操作人員點(diǎn)擊鼠標(biāo)，以及操作加速器避免人員的因素導(dǎo)致的測量的差異性。自動(dòng)擺位重復(fù)性更高。

靜電計(jì)集成在箱體上。無需連接電離室的延長電纜。減少使用水箱收放電纜的時(shí)間減少了延長電纜帶來的漏電流引起的噪聲3ds細(xì)節(jié)設(shè)計(jì)水箱箱體僅僅需要兩根連接線。數(shù)據(jù)線接頭可以很容易的穿過治療室到控制室數(shù)據(jù)線可以與Sunnuclear其他所有產(chǎn)品通用3ds細(xì)節(jié)設(shè)計(jì)參考探頭支架使用金屬軟管可以任意形狀彎曲3ds細(xì)節(jié)設(shè)計(jì)3DSCANNERLiftTable升降臺跨越治療床圓盤避免踩踏引起的水面的波動(dòng)避免水箱探頭運(yùn)動(dòng)時(shí)引起水箱的整體晃動(dòng)Measurementwith5mm/s3DSCANNERSquareTank3DMiniLift?輕便，可折疊推車易于儲藏和運(yùn)輸3DS儲水池推車快速的抽放水:裝水時(shí)間~5?minutes抽水時(shí)間~2?minutes靜音設(shè)計(jì)SNCDosimetry軟件特點(diǎn)使用數(shù)據(jù)庫的方式來管理數(shù)據(jù)保證數(shù)據(jù)的完整性

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