Lolu cwaningo lusekelwe ngoHulumeni Wezinhlelo Zesayensi yaseRussia futhi washicilelwa ku-Magnetine of resonance kazibuthe kwezokwelapha. "Emhlabeni jikelele, ukutholwa kwethu kuzovumela ukuthuthukisa ama-lattices afungelwe ngocwaningo lwe-MRI futhi asheshise ukwethulwa kwawo emtholampilo," kuchaza omunye wabafundi baka-sty George Solomoch, - Amathanga anezigaba akuvumela ukuba uhlanganise okukhulu kakhulu Indawo yeScan, futhi ilawule kangcono inqubo ngokwayo. Ukuhunyushwa komphumela wokugcina kuba lula futhi kusheshe. "
I-magnetic resonance topogrance - indlela yomuthi wanamuhla ibaluleke kakhulu. Ikuvumela ukuthi uhlole izitho zangaphakathi zomuntu ngokungahlaseli (ngaphandle kokuzenzakalelayo (ngaphandle kwe-autopsy eqondile) futhi cishe awunawo umphumela we-Ionizing uma uqhathaniswa ne-X-ray tomography. Kodwa-ke, i-applicatus eyodwa ibiza ama-ruble angaphansi kwezigidi eziyi-15 (hhayi ukubala izindleko zensizakalo) futhi ithatha indawo ethinta indawo encane yokugcina.
Ngasikhathi sinye, ikhwalithi nokunemba kwezithombe kuvame ukushiya okuningi ukufiswa. Emisebenzini yeMicrosoft Mri, ama-Tomographs anezinga lezinkomba zesigamu kanye nama-tesla amathathu asetshenziswa. Kodwa-ke, ngemisebenzi ehambisana nocwaningo lapho kudingeka khona ukuthola isinqumo esiphezulu, ama-tomographs anezinga lezinkambu eziyisikhombisa noma ngaphezulu asetshenziswa.
Umgomo wokusebenza kwe-MRI ususelwa ekuxhumaneni kwamandla kagesi weRadio Frequency ngeHydrogen Nuclei. Ngasikhathi sinye, ngoba i-nuclei yama-athomu e-hydrogen emzimbeni wethu ayizibuthe ezincane, zithambekele emigqeni yasensimini ephenduka endaweni eyodwa.
Kuliqiniso, lesi simo asinasizotha ngamandla, futhi ama-athomu abuyiselwa esimweni sawo "esivamile" ngokushesha okukhulu, ngokushesha nje lapho ekwazi ukugqamisa amandla amaningi. Ngokwenombolo yayo umuntu angaqonda ngayo ukuthi ngabe kukhona ama-athomu amaningi ento ethile ezicutshini ezifanele zomuntu. Ngakho-ke, umsebenzi wengqondo uyaphenywa - ngemuva kwakho konke, igazi elithe xaxa (ngakho-ke amanzi anama-athomu e-hydrogen) endaweni ethile, akhuphuka umsebenzi wawo. Kungenzeka futhi ukuthola amathumbu ezigabeni zokuqala, ngoba amaseli athintekile adala uketshezi oluthe xaxa kunokujwayelekile.
Amandla kazibuthe atholwe esebenzisa i-lattice ethuthukisiwe / i-avdievich et al. / Ubuningi Bezibuthe Kwezokwelapha, 2021
Ukwakha amandla kazibuthe omsakazo weRadio emathunjini anezinga lezinkomba, ama-antenna asetshenziswayo angaphezu kwesikhombisa ama-antenna. Banenzuzo ebalulekile: Vumela ukuthi ushintshe ukwenziwa kwasendaweni kwendaba yokucwaninga, ngaphandle kokuhamba ngasikhathi sinye i-lattice uqobo. I-Dipole antennas ingafakwa njengezakhi zethanga. Kodwa-ke, kungahle kube nokuxhumana phakathi kwama-Dipoles asebenzayo, anciphisa ukusebenza kahle kwawo wonke amakhoyili we-radio Frequency Coil.
Ukuvimbela lokhu, kusetshenziswa ama-Dipoles angenawo. Imvamisa zitholakala ngokufana, futhi zixazulula inkinga. Kepha le ndlela kufanele isetshenziswe ngokuqapha, ngoba ama-dipoles amakhulu angenamikhakha axhumana nenkambu, ebeka i-homogeneneity yayo, okugcina eholela ekwehleni kwekhwalithi yesithombe sokugcina, okusho ukuthi imiphumela yokuhlolwa kwakho konke.
Ososayensi abavela e-University of ITMO bashintshe i-geometry yama-disoles, ebeka ama-disoles angenayo nge-perpendicular ukuze asebenze. Futhi, ukuqinisekisa ukuxhumana okuqinile kagesi phakathi kwama-dipoles ama-physicists, into engenangqondo yathuthelwa ekugcineni kwe-grille. Ngaphambi kokuqhubeka nokwakha i-antenna lattice entsha, abacwaningi benza amamodeli, okwenza kwaba nokwenzeka ukwandisa isakhiwo. Ukusebenza kwayo kwahlolwa ngokwezibalo nokusebenzisa ukumbumbuluzwa kwekhompyutha. Ngaphezu kwalokho, izazi zesayensi yezesayensi zenze ukuhlolwa ngokwenza ubuchopho besilisa abadala i-MRI. Isheke likhombise ukuthi indawo enjalo ye-dipole ixazulula inkinga ehambisana ne-homogeneity yensimu, futhi ubudlelwano phakathi kwama-dipoles asebenzayo awaveli.
Umthombo: Isayensi Enqunu