Ikristalu Lokucwebezela
(Ukuqoshwa Kwe-Laser Engaphansi Komphezulu)
Izitholi ezisekelwe ku-scintillation, besebenzisa ama-scintillator ekristalu anga-inorganic afakwe ama-pixelated, yiwoisetshenziswa kabanzi ukuthola izinhlayiya kanye nemisebe, kufaka phakathi kuizikena ze-positron emission tomography (PET).
Ngokufaka izici eziqondisa ukukhanya kukristalu, isixazululo sendawo se-detectoringathuthukiswa ibe yi-millimeter scale, ithuthukise isinqumo se-tomograph iyonke.
Kodwa-ke, indlela yendabuko yokwenza lokhuukwenza ama-pixel ngokomzimbaamakristalu ainqubo eyinkimbinkimbi, ebizayo, futhi edinga umzamo omkhuluNgaphezu kwalokho, ingxenye yokupakisha kanye nokuzwela komtshinakungenziwa kube sengoziningenxaizinto ezibonisa ukukhanya ezingakhanyisi ezisetshenzisiwe.
Ungabuka Iphepha Locwaningo Lokuqala Lapha. (Kusukela ku-ResearchGate)
Ukuqoshwa Kwe-Laser Engaphansi Kobuso Kwe-Ikristalu Lokucwebezela
Enye indlela ukusebenzisaamasu okuqopha nge-laser ngaphansi komhlaba (i-SSLE)ngamakristalu e-scintillator.
Ngokugxilisa i-laser ngaphakathi kwekristalu, ukushisa okukhiqizwayokungadala iphethini elawulwayo yama-microcrackslokhozisebenza njengezakhiwo ezibonisa ukukhanya, ukudala ngempumeleloamaphikseli aqondisa ukukhanyangaphandle kwesidingo sokuhlukana ngokomzimba.
1. Akukho pixelation ebonakalayo yekristalu edingekayo,ukunciphisa ubunzima kanye nezindleko.
2. Izici zokukhanya kanye ne-geometry yezakhiwo ezibonisa ukukhanya kungabakulawulwa ngokunembile, okuvumela ukwakheka kwezimo namasayizi e-pixel ngokwezifiso.
3. Ukufundwa okuzenzakalelayo kanye nokwakhiwa kwe-detectorzihlala zifana nezamalungu ajwayelekile e-pixelated.
Inqubo Yokuqopha Nge-Laser (i-SSLE) ye-Scintlator Crystal
Inqubo yokuqopha i-SSLE ihilelaizinyathelo ezilandelayo:
1. Umklamo:
Ukulingisa kanye nokuklama kwe-ukwakheka kwephikseli okufiselekayo, kufaka phakathiubukhulufuthiizici zokukhanya.
2. Imodeli ye-CAD:
Ukudalwa kweimodeli ye-CAD enemininingwaneukusatshalaliswa kwe-microcrack,ngokusekelwe emiphumeleni yokulingisafuthiimininingwane yokuqopha nge-laser.
3. Qala Ukuqopha:
Ukuqoshwa kwangempela kwekristalu ye-LYSO kusetshenziswa uhlelo lwe-laser,kuqondiswa imodeli ye-CAD.
Inqubo Yokuthuthukiswa kwe-SSLE: (A)Imodeli Yokulingisa, (B)Imodeli ye-CAD, (C) I-LYSO Eqoshiwe, (D)Umdwebo Wezikhukhula Zensimu
4. Ukuhlolwa Kwemiphumela:
Ukuhlolwa kokusebenza kwekristalu eqoshiwe kusetshenziswaisithombe sensimu yezikhukhulafuthiUkufakwa kweGaussianukuhlola ikhwalithi yephikseli kanye nesisombululo sendawo.
Ukuqoshwa Kwe-Laser Engaphansi Komhlaba KUCHAZWE NGAMZUZU AMABILI
Iinqubo yokuqopha nge-laser engaphansi komhlabaamakristalu e-scintillator anikezaindlela yokuguqulaekuguqulweni kwamaphikseli kwalezi zinto.
Ngokunikeza ukulawula okunembile phezu kwezici zokukhanya kanye ne-geometry yezakhiwo ezibonisa ukukhanya, le ndlelakwenza kube lula ukuthuthukiswa kwezakhiwo ezintsha zokuthola ulwazingeukulungiswa kwendawo okuthuthukisiwe kanye nokusebenza, konkengaphandleisidingo sokwenziwa kwe-pixelation eyinkimbinkimbi futhi ebizayo ngokomzimba.
Ufuna Ukwazi Okwengeziwe mayelana:
Ikristalu Yokuqopha I-Laser Engaphansi Kobuso?
Okutholakele kwe-SSLE Scintillation Crystal
1. Ukukhanya Okuthuthukisiwe Okukhiqizwayo
Kwesobunxele: Ukubuka Konke Okuqoshwe Ngaphezulu Kokukhanya Okungabonakali Kwe-DoI.
Kwesokudla: I-Pixel Displacement DoI.
Ukuqhathaniswa kwama-pulse phakathiama-array aqoshiwe nge-laser engaphansi komhlaba (i-SSLE)futhiama-array avamilekukhombisaisivuno sokukhanya esingcono kakhulu se-SSLE.
Lokhu kungenzeka ngenxaukungabikho kwezibonisi zepulasitikiphakathi kwamaphikseli, okungabangela ukungafani kokukhanya kanye nokulahleka kwe-photon.
Umphumela wokukhanya othuthukisiwe usho ukuthiukukhanya okwengeziwe kwama-pulse afanayo wamandla, okwenza i-SSLE ibe yisici esifiselekayo.
2. Ukuthuthukiswa Kokuziphatha Kwesikhathi
Isithombe se-Scintillation Crystal
Ubude bekristalu buneumphumela omubi ngesikhathi, okubalulekile ekusetshenzisweni kwe-Positron Emission Tomography (PET).
Nokho,ukuzwela okuphezulu kwamakristalu e-SSLEivumela ukusetshenziswa kweamakristalu amafushane, okungabaukuthuthukisa ukuziphatha kwesikhathi kwesistimu.
Ukulingisa kuphinde kwaphakamisa ukuthi izimo ezahlukene zamaphikseli, njenge-hexagonal noma i-dodecagonal, zingase zibekuholela ekusebenzeni okungcono kokuqondisa ukukhanya kanye nokusebenza kwesikhathi, okufana nezimiso zemicu yokukhanya.
3. Izinzuzo Ezingabizi Kakhulu
Isithombe se-Scintlator Crystal
Uma kuqhathaniswa namabhulokhi e-monolithic, intengo yamakristalu e-SSLE iphezulu kakhulukungaba phansi njengeingxenye yesithathuyezindlekoye-array ehambisanayo ye-pixelated, kuye ngobukhulu be-pixel.
Ngaphezu kwalokho, i-ukuzwela okuphezulu kwamakristalu e-SSLEivumelaukusetshenziswa kwamakristalu amafushane, ukunciphisa izindleko zizonke.
Indlela ye-SSLE idinga amandla aphansi e-laser uma kuqhathaniswa nokusika nge-laser, okuvumelaizinhlelo ze-SSLE ezingabizi kakhuluuma kuqhathaniswa nezindawo zokuncibilikisa noma zokusika nge-laser.
Iukutshalwa kwezimali kokuqala kwingqalasizinda nokuqeqeshwakwe-SSLE nakho kuphansi kakhulukunezindleko zokuthuthukisa umshini wokuthola i-PET.
4. Ukuguquguquka Kwedizayini kanye Nokwenza Ngokwezifiso
Inqubo yokuqopha amakristalu e-SSLEakudli isikhathi, cisheimizuzu eyi-15kwakudingeka ukuqopha uhlu lwekristalu oluyi-12.8x12.8x12 mm, olunekristalu ezintathu.
Iimvelo eguquguqukayo, ukusebenza kahle kwezindleko, futhiukulungiswa okulula kwamakristalu e-SSLE, kanye naboingxenye yokupakisha engcono kakhulu, buyisela imaliukulungiswa kwendawo okuphansi kancaneuma kuqhathaniswa nama-array ajwayelekile e-pixelated.
Ama-geometri e-Pixel Angavamile
I-SSLE ivumela ukuhlolwa kwe-amajiyometri ephikseli angavamile, okuvumela amaphikseli akhazimulayo ukuthi abekufanelane kahle nezidingo ezithile zesicelo ngasinye, njenge-collimators noma ubukhulu bamaphikseli e-silicon photomultiplier.
Ukwabelana Ngokukhanya Okulawulwayo
Ukwabelana ngokukhanya okulawulwayo kungatholakala ngokuphathwa ngokunembile kwezici zokukhanya zezindawo eziqoshiwe,ukwenza kube lula ukwenza kube lula ukuthola ama-gamma detectors.
Imiklamo Engavamile
Imiklamo engavamile, njenge-Voronoi tessellations, ingabakuqoshwe kalula ngaphakathi kwamakristalu e-monolithicNgaphezu kwalokho, ukusatshalaliswa okungahleliwe kosayizi bamaphikseli kungenza kube nokwenzeka ukwethulwa kwamasu okuzwa acindezelwe, kusetshenziswa ukwabelana ngokukhanya okubanzi.
Imishini Yokuqopha Nge-Laser Engaphansi Kobuso
Inhliziyo yokudalwa kwe-Subsurface Laser isemshinini wokuqopha nge-laser. Le mishini isebenzisai-laser eluhlaza enamandla amakhulu, eyenzelwe ngqoukuqoshwa kwe-laser engaphansi komhlaba ngekristalu.
IIsixazululo Esisodwa Nokuphela Kwasooyoke uyidinge ukuze uqophe i-Subsurface Laser.
UsekeloUkucushwa Okuhlukene Oku-6
KusukelaUmthandi Wokuzijabulisa Osezingeni Elincane to Ukukhiqizwa Okukhulu
Ukunemba Kwendawo Okuphindaphindiwe at <10μm
Ukunemba KokuhlinzwaKokuqopha Nge-Laser Ye-3D
Umshini Wokuqopha I-Laser Yekristalu Ye-3D(I-SSLE)
Kokuqopha Nge-Laser Engaphansi Kobuso,ukunemba kubalulekileukudala ukuqoshwa okunemininingwane nokuyinkimbinkimbi. Umsebe ogxile ku-laserixhumana ngokunembilengesakhiwo sangaphakathi sekristalu,ukudala isithombe se-3D.
Iyaphatheka, Inembile Futhi Ithuthukile
Umzimba Oqinile We-Laserye-SSLE
Ivikela Ukushaqeka & Kuphephile Kwabaqalayo
Ukuqoshwa Okusheshayo Kwekristalukufikela kumaphoyinti angu-3600 ngomzuzwana
Ukuhambisana Okuhleku-Design