Olu phando lwaluxhaswe yinkqubo kaMongameli weNgxowa-mali yaseRussia kwaye yapapashwa kwimaguti yemagazini yezamayeza. "Emhlabeni jikelele, ukuba kufumaneke, ukuvumela kwethu ukuvumela ukuba kuqulunqwe uluhlu lwe-MRI kwaye kukhawulezisa ukumiliselwa kwabo kunyango lwekliniki," ucacisa omnye wababhali beli nqaku, "icacisa ukuba ihlawulwe kakhulu Indawo yeskena, kwaye ikwazi ukulawula ngcono le nkqubo ngokwayo. Ukutolikwa kwesiphumo sokugqibela kuya kuba lula kwaye ngokukhawuleza. "
I-Magnetic Regraphy Topography-Indlela yoNyango yale mihla ibalulekile. Ikuvumela ukuba uphonononge amaziko angaphakathi omntu ongenamhlanya engawanayo Nangona kunjalo, i-apratus enye ixabiseke ingaphantsi kwe-15 yezigidi zeeruble (ezingakhange zibale iindleko zenkonzo) kwaye zifumana indawo yokusebenza kunye nendawo encinci yokugcina.
Kwangelo xesha, umgangatho kunye nokuchaneka kwemifanekiso rhoqo kushiya lukhulu. Kwimisebenzi ye-MRI yeklinikhi, i-momobles enenqanaba lentsimi yesiqingatha kunye ne-Tessa ezintathu zisetyenziswa. Nangona kunjalo, kwimisebenzi enxulumene nophando apho kufuneka khona ukufumana esona sisombululo siphezulu, i-tomographs yenqanaba lesixhenxe okanye ngaphezulu isetyenziswa i-TSLA.
Umgaqo-nkqubo wokusebenza kwe-MRI usekwe kwintsebenzo ye-radiy yemagnethi ye-magnetic nuclegen nuclei. Kwangelo xesha, kuba i-nuclei yeeatom ze-hydrogen emzimbeni zimbini iimagnethi, zigxile kwimigca yasentsimini ijika kwicala elinye.
Kuyinyani, le meko ayikho impumelelo, kwaye ii-athom zibuyiselwe kwindawo yazo "yesiqhelo" ngokukhawuleza, kwakamsinya nje ukuba babalaselise amandla angaphezulu. Ngokwenani layo ukuba umntu aqonde ukuba ngaba zininzi ii-atom zento ethile kwizicubu ezifanelekileyo zomntu. Ngenxa yoko, umsebenzi wengqondo uphezulu - emva kwayo yonke loo nto, igazi elingakumbi (kwaye ke amanzi ane-atom ye-hydrogen) kwindawo ethile, ephakamile. Kuyenzeka ukuba ufumane amathumba kumanqanaba okuqala, kuba iiseli ezichaphazelekayo zidala ulwelo ngakumbi kunesiqhelo.
Amabala e-magnetic afunyenwe kusetyenziswa i-latrice ephumeleleyo ye-lavdice / © Avdievich et al. / I-Magnetic Resonas kwiNyango, i-2021
Ukwenza intsimi yerediyo ye-radication ye-magnetic kwi-nenebles enenqanaba lentsimi, ngaphezu kwesixhenxe iTessa Sebenzisa i-Antenna iqhinga. Banethuba elibalulekileyo: Vumela ukuba utshintshe indawo yokungakhethela isifundo sophando, ngaphandle kokuhamba kwangaxeshanye i-hlestice uqobo. I-Dipole i-Antentenas inokusetyenziswa njengezinto ze-hice. Nangona kunjalo, kunokubakho unxibelelwano phakathi kweeDipoles ezisebenzayo, ezinciphisa ukusebenza kakuhle kwe-radio frequency coil.
Ukuthintela oku, kusetyenziswa iidipoli ezingxwaba. Ngokwesiqhelo bafumaneka kwi-parallel esebenzayo, kwaye isombulula ingxaki. Kodwa le ndlela kufuneka isetyenziswe ngononophelo, kuba iindiza ezinkulu ezihambayo zinxibelelana nentsimi, ebonisa i-homogeneity yayo, ekhokelela ekunciphiseni komgangatho womfanekiso ogqityiweyo, okuthetha ukuba iziphumo zovavanyo lonke lonyango.
Izazinzulu kwiDyunivesithi yase-ITMO itshintshe iJometri ye-Dipoles, ibeka iidipozi ezihambayo ngokusebenza. Kwakhona, ukuqinisekisa unxibelelwano olomeleleyo lombane phakathi kweeDipole zegqirha, into ephathekayo yafudukela ekupheleni kweGrille. Ngaphambi kokuqhubeka nokwenza i-antenna entsha, abaphandi benza imodeli, eyayisenziwa ukuba ikwazi ukwandisa ubume. Ukusebenza kwayo kuvavanywa ngokwezibalo kunye nokusebenzisa ikhompyuter. Ukongeza, i-phydistists iqhube ixesha lokwenza ubuchopho bengqondo yabantu abadala. Itsheki ibonise ukuba indawo enjalo i-Dipole isombulula ingxaki enxulumene ne-homogeneity yentsimi, kwaye ubudlelwane phakathi kweedipozi ezisebenzayo aziveli.
Umthombo: Inzululwazi yezeSwaziya