Puhiwi mai la kekahi screwdriver ma ko'u pepeiao. Me ka leo kani nui, ua hau ʻo ia ma ke kino cryostat. Ke hōʻino nei iaʻu iho, ua hoʻoholo wau e hoʻomaha. ʻAʻole maikaʻi ka wehe ʻana i nā bolts i kahi māla magnetic o 1.5 Tesla me ka hoʻohana ʻana i kahi mea kila. ʻO ke kahua, e like me ka ʻenemi i ʻike ʻole ʻia, e hoʻāʻo mau nei e kāʻili i ka mea kani mai nā lima aku, e kuhikuhi iā ia ma kāna mau laina ikaika a kuhikuhi iā ia i kahi kokoke loa i nā electrons e holo ana i kahi pōʻai pani mai ka superconductor. Eia nō naʻe, inā pono ʻoe e lanakila i nā pūhui acidified mai nā makahiki he nui aku nei, ʻaʻohe koho nui. Noho au i lalo ma ka lolouila a maʻa mau au i ka ʻōwili ma ka nūhou. "Ua hoʻomaikaʻi nā ʻepekema Lūkini i ka MRI ma 2 mau manawa!" - heluhelu i ke poʻo poʻomanaʻo.
Ma kahi o hoʻokahi makahiki aku nei, mākou a hoʻomaopopo i ke ʻano o kāna hana. Paipai ikaika wau iā ʻoe e hoʻomaʻamaʻa i kou hoʻomanaʻo ʻana i kēlā mea ma mua o ka heluhelu ʻana i kēia ʻatikala.
No nā kumu like ʻole, me nā moʻolelo, i Rusia i kēia lā ka hana ʻana i nā mea hana paʻakikī e like me nā kiʻi kiʻi kiʻi magnetic resonance kiʻekiʻe. Eia nō naʻe, inā noho ʻoe ma ke kūlanakauhale nui, hiki iā ʻoe ke loaʻa i nā keʻena lapaʻau e hāʻawi i kēia ʻano lawelawe. I ka manawa like, ua hōʻike pinepine ʻia ka ʻauwaʻa o nā mea ʻimi MRI e nā mea i hoʻohana ʻia, i lawe ʻia mai ʻAmelika a me ʻEulopa, a inā ʻoe e kipa koke i kahi keʻena me kahi MRI, mai hoʻopunipuni ʻia e ka nani o ka hāmeʻa - aia paha i ka lua o kona mau makahiki. ʻO ka hopena, ua haʻihaʻi kēlā mau mea hana i kekahi manawa, a no ka manawa lōʻihi, ʻo wau kekahi o kēlā poʻe i hoʻihoʻi i nā tomograph haki i ka lawelawe, i hiki ai i nā maʻi ke hoʻomau i ka hana diagnostics, a hiki i nā mea nona ke loaʻa kālā.
A hiki i kekahi lā maikaʻi, i ka wā hoʻomaha ma waena o nā leʻaleʻa weliweli me nā māla magnetic nui, ua ʻike au i kahi palapala hoihoi ma ka nūhou: "ʻO nā ʻepekema Lūkini me nā hoa hana Dutch. me ka hoʻohana ʻana i nā metamaterial." ʻAʻole pono e ʻōlelo, ʻo ka ʻoiaʻiʻo e alakaʻi nei ʻo Rūsia i ka noiʻi ʻana i nā mea hana, ʻaʻole i ʻike ʻia ka hana ʻana o ia mea, me he mea lā iaʻu he hoʻopaʻapaʻa loa. Ua hoʻoholo wau he ʻāpana kālā ʻē aʻe kēia, i hoʻoheheʻe ʻia me nā huaʻōlelo ʻepekema hiki ʻole ke hoʻomaopopo ʻia e like me ka "nanotechnology" i hānai ʻia e nā mea a pau. ʻO ka ʻimi ʻana i ka ʻike e pili ana i ke kumuhana o ka hana a nā ʻepekema kūloko me MRI a me nā metamaterial ua alakaʻi iaʻu i kahi ʻatikala e loaʻa ana ka wehewehe ʻana i kahi hoʻokolohua maʻalahi e hiki iaʻu ke hana hou, no ka mea aia mau ka mīkini MRI.
Kiʻi mai , hoʻolaʻa i ka hoʻonui ʻana i ka hōʻailona MRI me ka hoʻohana ʻana i ka mea i kapa ʻia "metamaterial". I loko o kahi maʻi maʻamau 1.5 - Thermal apparatus, ma kahi o ka mea maʻi, ua hoʻouka ʻia ka metamaterial, ma ke ʻano o kahi kīʻaha wai, aia i loko o nā uea like ʻole o kekahi lōʻihi. Aia ma luna o nā uwea ka mea aʻo - he iʻa (ola ʻole). ʻO nā kiʻi ma ka ʻaoʻao ʻākau he mau kiʻi MRI o ka iʻa, me kahi palapala kala i hoʻopaʻa ʻia e hōʻike ana i ka ikaika hōʻailona o ka hydrogen nuclei. Hiki ke ʻike ʻia i ka wā e waiho ai ka iʻa ma luna o nā uea, ʻoi aku ka maikaʻi o ka hōʻailona ma mua o ka ʻole o lākou. Ua like ka manawa scanning i nā hihia ʻelua, e hōʻike ana i ka hoʻomaikaʻi ʻana i ka pono scanning. Ua hoʻokomo pono ʻia ka ʻatikala
ka moola
e helu i ka lōʻihi o nā uea e pili ana i ke alapine hana o ka tomograph, aʻu i hoʻohana ai. Ua hana au i kaʻu metamaterial mai kahi cuvette a me kahi ʻano o nā uea keleawe, i hoʻolako ʻia me nā mea paʻi plastic paʻi 3D:
ʻO kaʻu metamaterial mua. Ma hope koke o ka hana ʻana ua hoʻokomo ʻia i loko o kahi tomograph 1 Tesla. Ua lilo ka ʻalani i mea e nānā ʻia.
Eia naʻe, ma kahi o ka hoʻonui ʻana i ka hōʻailona i hoʻohiki ʻia, ua loaʻa iaʻu kahi pūʻulu o nā mea hana i hoʻopau loa i ke kiʻi! ʻAʻohe palena o koʻu huhū! Ma hope o ka pau ʻana o ke kumuhana, kākau wau i kahi leka i nā mea kākau o ka ʻatikala, hiki ke hoʻemi ʻia ke ʻano o ia mea i ka nīnau "He aha ...?"
Ua pane koke mai nā mea kākau iaʻu. Ua hauʻoli loa lākou i ka hoʻāʻo ʻana o kekahi e hana hou i kā lākou hoʻokolohua. I ka wā mua, ua ho'āʻo lākou no ka manawa lōʻihi e wehewehe mai iaʻu i ka hana maoli ʻana o nā metamaterials, me ka hoʻohana ʻana i nā huaʻōlelo "Fabry-Perot resonances", "intrinsic modes", a me nā ʻano kīʻaha lekiō āpau i ka leo. A laila, me ka maopopo ʻole iaʻu ʻaʻole maopopo iaʻu i ka mea a lākou e kamaʻilio nei, ua hoʻoholo lākou e kono iaʻu e kipa aku iā lākou i hiki iaʻu ke nānā i kā lākou hoʻomohala ola a ʻike i ka hana mau. Ua hoʻolei au i kaʻu hao hao punahele i loko o koʻu ʻeke ʻeke a hele i St. Petersburg, i ka National Research University of Information Technologies, Mechanics and Optics (e like me ka mea i ʻike ʻia, ʻaʻole i aʻo ʻia nā mea papahana ma laila).
Ua hoʻokipa maikaʻi ʻia au ma ka pūnaewele, a ua hāʻawi koke mai lākou iaʻu i kahi hana, no ka mea ua hauʻoli lākou i kaʻu auwai me nā uwea a makemake lākou i kahi kanaka e hana i nā mea hou. I ka hoʻihoʻi ʻana, ua hoʻohiki lākou e wehewehe kikoʻī i nā mea āpau e makemake ai iaʻu a e lawe i kahi papa hoʻomaʻamaʻa i ka radiophysics a me MRI, ʻo ia hoʻi, ma ka laki coincidence, hoʻomaka pololei i kēlā makahiki. Ua lanakila koʻu makewai i ka ʻike, a laila, i loko o ka makahiki, ua aʻo au, hana i nā papahana a hana, e aʻo mālie i nā mea hou aʻe e pili ana i ka mōʻaukala o ka resonance magnetic, a me ke kūlana o ka ʻepekema hou i kēia wahi, aʻu e makemake ai. kaʻana like maanei.
ʻO ke ʻano o ka hoʻomaikaʻi ʻana i ka MRI, a ua aʻo ʻia i loko o nā ʻatikala ʻepekema i ʻōlelo ʻia, ma muli o ka mea i kapa ʻia ʻo "metamaterials". ʻO nā metamaterials, e like me nā ʻike ʻē aʻe he nui, ke ʻano o ko lākou helehelena i nā hopena i manaʻo ʻole ʻia i loaʻa ma ke kumu o ka noiʻi theoretical. ʻO ka mea ʻepekema Soviet, ʻo Viktor Veselago, i ka makahiki 1967, e hana ana i kahi kumu hoʻohālike, manaʻo i ke ola ʻana o nā mea me kahi kuhikuhi refractive maikaʻi ʻole. E like me kāu i hoʻomaopopo mua ai, ke kamaʻilio nei mākou e pili ana i ka optics, a ʻo ka waiwai o kēia coefficient, ma ka ʻōlelo ʻana, ʻo ia ka nui o ka mālamalama e hoʻololi i kona kuhikuhi i ka wā e hele ai i ka palena ma waena o nā media like ʻole, no ka laʻana ka ea a me ka wai. Hiki iā ʻoe ke hōʻoia maʻalahi iā ʻoe iho e hana maoli kēia:
ʻO kahi hoʻokolohua maʻalahi e hoʻohana ana i ka pointer laser a me kahi aquarium e hōʻike i ka refraction o ka mālamalama.
ʻO kahi ʻike hoihoi e hiki ke aʻo ʻia mai ia ʻano hoʻokolohua, ʻaʻole hiki ke hoʻohuli ʻia ke kukuna ma ka ʻaoʻao hoʻokahi mai kahi i hāʻule ai i ka interface, ʻoiai ʻo ka ikaika o ka mea hoʻokolohua. Ua hoʻokō ʻia kēia hoʻokolohua me nā mea kūlohelohe a pau, akā ua hoʻopaʻa ʻia ka lāʻau i hoʻokahi ʻaoʻao wale nō. ʻO ka makemakika, ʻo ia hoʻi, he maikaʻi ka huaʻōlelo refractive, a me kona nui constituent, dielectric a me magnetic permeability, a ʻaʻole i ʻike ʻia. Ma ka liʻiliʻi a hiki i ka wā i hoʻoholo ai ʻo V. Veselago e aʻo i kēia pilikia a hōʻike ʻo ia ʻaʻohe kumu hoʻokahi e hiki ʻole ai i ka helu refractive ke ʻino.
ʻO ke kiʻi mai Wiki e hōʻike ana i ka ʻokoʻa ma waena o ka media kuhikuhi maikaʻi a maikaʻi ʻole. E like me kā mākou e ʻike nei, ʻaʻohe kūlohelohe o ka mālamalama, ke hoʻohālikelike ʻia i kā mākou ʻike i kēlā me kēia lā.
Ua hoʻāʻo ʻo V. Veselago no ka manawa lōʻihi e ʻimi i nā hōʻike o ke ola ʻana o nā mea me kahi kuhikuhi refractive maikaʻi ʻole, akā ʻaʻole i kūleʻa ka huli ʻana, a ua poina ʻole kāna hana. ʻO ia wale nō i ka hoʻomaka ʻana o ke kenekulia e hiki mai ana i hoʻokumu ʻia i nā hale hana i hoʻomaopopo ʻia i nā waiwai i wehewehe ʻia, ʻaʻole naʻe i ka optical, akā i ka haʻahaʻa haʻahaʻa microwave. He wahi hoʻololi kēia, ʻoiai ʻo ka hiki ke loaʻa o ia mau mea i wehe i nā manaʻo hou. No ka laʻana - hana , hiki ke hoʻonui i nā mea i ʻoi aku ka liʻiliʻi ma mua o ka nalu o ka mālamalama. A i ʻole - nā uhi ʻike ʻole camouflage, ka moeʻuhane o nā pūʻali koa āpau. Ua hana ʻia nā hoʻololi nui i ke kumumanaʻo e noʻonoʻo i ka ʻikepili hou. ʻO ke kī i ka holomua ʻo ka hoʻohana ʻana i nā hale i kauoha ʻia o nā mea resonant - metaatoms, ʻoi aku ka liʻiliʻi o ka nui ma mua o ka lōʻihi o ka hawewe o ka radiation a lākou e launa pū ai. ʻO kahi hoʻonohonoho i kauoha ʻia o nā meta-atoms he mea hana i kapa ʻia he metamaterial.
ʻO ka hoʻokō pono ʻana o nā metamaterial a hiki i kēia lā he paʻakikī ʻenehana, ʻoiai ka nui o nā ʻāpana resonant e hoʻohālikelike ʻia me ka liʻiliʻi ma mua o ka lōʻihi o ka hawewe electromagnetic. No ka laulā optical (kahi o ka nanometer ka lōʻihi o ka hawewe), aia ia mau ʻenehana i mua o ka holomua. No laila, ʻaʻole ia he mea kupanaha ua hoʻokumu ʻia nā ʻelele mua o ka manaʻo metamaterial no nā hawewe electromagnetic lōʻihi loa mai ka lekiō (ʻoi aku ka lōʻihi mai mm a m). ʻO ka hiʻohiʻona nui a ma ka manawa like ka hemahema o kekahi metamaterial ka hopena o ke ʻano resonant o kāna mau mea hoʻohui. Hiki i ka Metamaterial ke hōʻike i kona mau mea kupanaha i kekahi mau alapine wale nō.
Nā alapine palena.No laila, no ka laʻana, i ka manawa aʻe e ʻike ai ʻoe i kahi mea e like me ka super-sound jammer e pili ana i nā metamaterial, e nīnau i ke ʻano alapine e paʻa maoli ai.
ʻO nā hiʻohiʻona maʻamau o nā metamaterial e ʻae i ka launa pū me nā hawewe electromagnetic. ʻAʻole ʻē aʻe nā mea hoʻokele conductor ma mua o nā resonator liʻiliʻi, nā kaapuni LC i hana ʻia e ke kūlana spatial o nā conductors.
Ua hala ka manawa liʻiliʻi mai ka puka ʻana mai o ka manaʻo o nā metamaterials a me kā lākou hoʻokō mua ʻana, a noʻonoʻo ka poʻe pehea e hoʻohana ai iā lākou ma MRI. ʻO ka hemahema nui o nā metamaterial, ʻo ia ka pilikia o ka hana haiki no MRI, kahi e hana ʻia ai nā kaʻina hana a pau ma kahi kokoke i ka nuclear magnetic resonance frequency, aia ma ka lekiō. Maanei hiki iā ʻoe ke hana i nā meta-atoms me kou mau lima ponoʻī a ʻike koke i ka mea e hana nei i nā kiʻi. ʻO kekahi o nā hiʻohiʻona mua i hoʻokō ʻia e nā mea noiʻi ma MRI me ka hoʻohana ʻana i nā metamaterial he superlenses a me nā endoscopes.
Ma ka ʻaoʻao hema ma lalo o ka leka a) hōʻike ʻia kahi superlens, ʻo ia hoʻi kahi ʻano ʻekolu-dimensional o nā resonator ma nā papa kaapuni paʻi. ʻO kēlā me kēia resonator he apo metala hāmama me kahi capacitor soldered, e hana ana i kahi kaapuni LC i hoʻopaʻa ʻia i ke alapine MRI. Aia ma lalo kahi hiʻohiʻona o ke kau ʻana i kēia ʻano metamaterial ma waena o nā wāwae o ka mea maʻi e hana ana i kahi kaʻina tomography a, no laila, nā kiʻi i hopena. Inā ʻaʻole ʻoe i hoʻowahāwahā i ka ʻōlelo aʻo e heluhelu i kaʻu ʻatikala mua ma MRI, a laila ua ʻike mua ʻoe i ka loaʻa ʻana o kahi kiʻi o kekahi ʻāpana o ke kino o ka mea maʻi, pono e hōʻiliʻili i nā hōʻailona nuklea nāwaliwali, me ka hoʻohana ʻana i kahi kokoke loa. antenna - a coil.
Hiki i ka metamaterial super lens ke hoʻonui i ka laulā o ka hana o kahi coil maʻamau. No ka laʻana, e nānā i nā wāwae ʻelua o ka mea maʻi i ka manawa hoʻokahi ma kahi o hoʻokahi wale nō. ʻO ka nūhou maikaʻi ʻo ia ke koho ʻana i ke kūlana o nā superlens ma kekahi ʻano no ka hopena maikaʻi loa, a ʻo ka superlens ponoʻī ke kumu kūʻai nui i ka hana ʻana. Inā ʻaʻole maopopo iā ʻoe ke kumu i kapa ʻia ai kēia lens he super-prefix, a laila e hoʻohālikelike i kona nui mai ke kiʻi, a laila e hoʻomaopopo ʻoe e hana ana me ka lōʻihi o ka nalu ma kahi o ʻelima mau mika!
Hōʻike ka leka b) i ka hoʻolālā o ka endoscope. ʻO ka mea nui, ʻo kahi endoscope MRI kahi ʻano o nā uea like ʻole e hana ma ke ʻano he alakaʻi nalu. Hāʻawi ia iā ʻoe e hoʻokaʻawale spatially i ka ʻāina kahi i loaʻa ai i ka coil ka hōʻailona mai ka nuclei a me ka coil iā ia iho ma kahi mamao loa - a hiki i kahi e hiki ai ke loaʻa ka antenna i waho o ka cryostat o ka tomograph, mamao loa mai ka magnetic mau. kahua. ʻO nā kiʻi haʻahaʻa o ka tab b) hōʻike i nā kiʻi i loaʻa no kahi moku wai piha piha - he phantom. ʻO ka ʻokoʻa ma waena o lākou, ʻo nā kiʻi i kapa ʻia ʻo "endoscope" i loaʻa i ka wā o ka coil i kahi mamao kūpono mai ka phantom, kahi me ka ʻole o ka endoscope hiki ʻole ke ʻike ʻia nā hōʻailona mai ka nuclei.
Inā mākou e kamaʻilio e pili ana i kekahi o ka loa olelo hoopomaikai wahi o ka noi o metamaterials ma MRI, a me ka kokoke loa i kona hoʻokō 'ana (i aʻu hope loa komo i loko) o ka hana 'ana i ka uea coils. Pono e wehewehe ʻaʻole mākou e kamaʻilio e pili ana i ka Bluetooth a i ʻole nā ʻenehana hoʻoili ʻikepili uila ʻē aʻe ma aneʻi. ʻO "Wireless" i kēia hihia ke ʻano o ka hoʻopili ʻana i ka inductive a i ʻole capacitive coupling o ʻelua resonant structures - kahi transceiver antenna, a me kahi metamaterial. Ma ka manaʻo e like me kēia:
Hōʻike ʻia ma ka ʻaoʻao hema ke ʻano o ka hana maʻamau o ka MRI: aia ka mea maʻi i loko o kahi cryostat ma kahi ʻāpana o kahi kahua magnetic static. Hoʻokomo ʻia kahi antenna nui i kapa ʻia ʻo "bird cage" i loko o ka tunnel tomograph. ʻO kahi antenna o kēia hoʻonohonoho e hiki ai iā ʻoe ke hoʻololi i ka vector o ka lekiō frequency magnetic field me ka precession frequency o ka hydrogen nuclei (no nā mīkini lapaʻau maʻamau kēia mai 40 a 120 MHz ma muli o ka nui o ke kahua magnetic static mai 1T a 3T, i kēlā me kēia), e hoʻoneʻe iā lākou i ka ikehu a laila e hoʻokuʻu i ka ikehu i ka pane. He nāwaliwali loa ka hōʻailona pane mai nā cores a i ka manawa e hiki ai i nā conductors o kahi antenna nui, e mae ʻole ia. No kēia kumu, hoʻohana ʻo MRI i nā coils kūloko kokoke loa e loaʻa nā hōʻailona. ʻO ke kiʻi ma waenakonu, no ka laʻana, e hōʻike ana i kahi kūlana nānā kuli maʻamau. Me ka hoʻohana ʻana i nā metamaterials, hiki ke hana i kahi resonator e hoʻopili ʻia i loko o ka hale manu. Ua lawa ka waiho ʻana i kēlā mea kokoke i ka wahi i makemake ʻia o ke kino o ka mea maʻi a ʻaʻole e loaʻa ka hōʻailona mai laila ʻoi aku ka maikaʻi ma mua o kahi coil kūloko! Inā hoʻokō maikaʻi ʻia ka manaʻo, ʻaʻole pono nā maʻi e hoʻopili hou i nā uwea, a ʻoi aku ka ʻoluʻolu o ke kaʻina hana diagnostic MRI.
ʻO kēia ke ʻano o ka mea aʻu i hoʻāʻo ai e hana i ka hoʻomaka ʻana, ma ka hoʻopiha ʻana i nā uea me ka wai a me ka hoʻāʻo ʻana e nānā i kahi ʻalani. ʻO nā uea i hoʻokomo ʻia i loko o ka wai mai ke kiʻi mua loa ma kēia ʻatikala he mea ʻē aʻe ma mua o nā meta-atoms, kēlā me kēia mea e hōʻike ana i kahi dipole hapalua hawewe - kekahi o nā hoʻolālā antenna kaulana loa, i kamaʻāina i kēlā me kēia radio amateur.
Hoʻokomo ʻia lākou i loko o ka wai ʻaʻole i loaʻa iā lākou ke ahi ma MRI (ʻoiai no kēia kumu pū kekahi)), akā i mea, ma muli o ke kiʻekiʻe o ka dielectric mau o ka wai, e hoʻemi i kā lākou resonant lōʻihi e ka huina like me ka huinahā. kumu o ka dielectric mau o ka wai.
Ua hoʻohana lōʻihi ʻia kēia chip i nā mea hoʻokipa lekiō, wili uea ma kahi ʻāpana ferrite - ka mea i kapa ʻia. antenna ferrite. ʻO ka ferrite wale nō ke kiʻekiʻe o ka magnetic permeability, ʻaʻole ka dielectric, akā naʻe, hana like ia a hiki ke hoʻemi ʻia nā ana resonant o ka antenna. ʻO ka mea pōʻino, ʻaʻole hiki iā ʻoe ke hoʻokomo i ka ferrite i kahi MRI, no ka mea ... ʻo ia ka magnetic. ʻO ka wai kahi mea ʻokoʻa maʻalahi a hiki ke loaʻa.
Akaka no ka helu ʻana i kēia mau mea a pau, pono ʻoe e kūkulu i nā hiʻohiʻona makemakika paʻakikī e noʻonoʻo ana i ka pilina ma waena o nā mea resonant, nā ʻāpana kūlohelohe a me nā kumu radiation ... hoʻohālike, hiki i ke keiki kula ke hoʻomaopopo maʻalahi (ʻo nā hiʻohiʻona maikaʻi loa - CST, HFSS). Hāʻawi ka polokalamu iā ʻoe e hana i nā hiʻohiʻona 3D o nā resonators, antennas, nā uila uila, e hoʻohui i nā kānaka iā lākou - ʻae, ʻoiaʻiʻo, ʻo kekahi mea, ʻo ka nīnau wale nō kāu noʻonoʻo a me ka mana computing loaʻa. Hoʻokaʻawale ʻia nā hiʻohiʻona i kūkulu ʻia i nā grids, ma nā nodes kahi i hoʻoholo ʻia ai nā hoʻohālikelike Maxwell kaulana.
Eia, no ka laʻana, he simulation o ka radio frequency magnetic field i loko o ka antenna birdcage i ʻōlelo mua ʻia.
Akaka koke ke ʻano o ka holo ʻana o ke kahua. Hōʻike ʻia ke kūlana ma ka ʻaoʻao hema inā aia kahi pahu wai i loko o ka antenna, a ma ka ʻaoʻao ʻākau - ke kau ʻia ka pahu hoʻokahi ma kahi resonator i hana ʻia me nā uea o ka lōʻihi resonant. Hiki iā ʻoe ke ʻike i ka hoʻonui ʻia ʻana o ke kahua magnetic e nā uea. Ma hope o ka haku ʻana i ka CST a me ka hoʻonui ʻana i kaʻu hoʻolālā ma laila, ua hana hou au i kahi metamaterial, kahi i hiki ai ke hoʻonui i ka hōʻailona ma kahi maʻamau 1.5T MRI tomograph. He pahu ia (ʻoi aku ka nani, i hana ʻia me ka plexiglass), hoʻopiha ʻia me ka wai a me nā ʻano uea. I kēia manawa, ua hoʻolālā ʻia ke ʻano o nā kūlana resonant, ʻo ia hoʻi: ke koho ʻana i ka lōʻihi o nā uea, ko lākou kūlana, a me ka nui o ka wai. Eia ka mea i hanaʻia me ka'ōmato:
Ua hana ʻia ka scan mua o ka ʻōmato me kahi antenna nui. ʻO ka hopena, he walaʻau wale nō me nā kiʻi ʻike ʻole ʻia. ʻO ka lua o ka manawa aʻu i kau ai i ka hua ma luna o kahi hanana resonance hou. ʻAʻole au i kūkulu i nā palapala ʻāina kala a i ʻole kekahi mea like me ia, no ka mea, ʻike ʻia ka hopena. No laila, mai koʻu ʻike ponoʻī, ʻoiai ua lōʻihi koʻu manawa, ua hōʻoia wau i ka hana o ka manaʻo.
Akaka i kou manaʻo - ʻalani, ʻōmato - ʻaʻohe hewa, aia i hea nā hoʻokolokolo kanaka?
ʻO lākou maoli nō :
Aia ka lima o kahi mea manawaleʻa e hana ana i kahi MRI ma ka pahu hoʻokahi. ʻIke maopopo ʻia ka wai maoli i loko o ka pahu, no ka mea he hydrogen. Hoʻonui ʻia ka hōʻailona ma kahi o ka lima lima e waiho ana ma ka resonator, ʻoiai ʻike ʻole ʻia nā ʻāpana ʻē aʻe o ke kino. Ua maopopo ka hopena like, a ʻoi aku paha ka maikaʻi, hiki ke hoʻokō me ka hoʻohana ʻana i nā coils clinical maʻamau. Akā ʻo ka ʻoiaʻiʻo hiki iā ʻoe ke hana i ia mau mea ma ka hoʻohui ʻana i ka wai a me nā uea, hoʻohui iā lākou ma ke ala kūpono, he mea kupanaha. ʻOi aku ka mea kupaianaha, hiki ke loaʻa ka ʻike e pili ana i kēia ma o ke aʻo ʻana i nā ʻano like ʻole e pili ana, e like me ka refraction o ka mālamalama.
No ka poe luhi oleI kēia manawa, ua hoʻomaikaʻi ʻia ka hoʻolālā ʻana o ka pahu wai. I kēia manawa he papa kaapuni paʻa paʻa wale ia e hiki ai iā ʻoe ke hoʻokaʻawale i ke kahua magnetic o kahi antenna nui waho kokoke iā ʻoe. Eia kekahi, ʻoi aku ka nui o kāna wahi hana ma mua o ka hoʻolālā mua:
Hōʻike nā lipine kala i ka ikaika o ke kahua magnetic ma luna o ka hale ke hoʻohauʻoli ʻia e kahi kumu o waho o nā nalu electromagnetic. ʻO ka papa pālahalaha kahi laina hoʻouna maʻamau i ʻike ʻia i ka ʻenekinia radio, akā hiki ke noʻonoʻo ʻia he metamaterial no MRI. Hiki i kēia "wireless coil" ke hoʻokūkū me nā coils maʻamau e pili ana i ka kūlike o ke kahua i hana ʻia ma kahi hohonu o ka mea i nānā ʻia:
Hōʻike ka hāmeʻa i kahi palapala ʻāpana kala o ka hōʻailona i loko o kahi pahu wai i kahi MRI. Hōʻike ke kala i ka ikaika o nā hōʻailona mai ka nuclei hydrogen. Ma ka ʻaoʻao hema hema, hoʻohana ʻia kahi ʻāpana o ka coil scanning back maʻamau i mea hoʻokipa. ʻO ka ʻaoʻao hema hema ke kau ʻia ka pahu ma luna o kahi resonator ma ke ʻano o kahi papa kaapuni paʻi. Ma lalo ʻākau - loaʻa ka hōʻailona e kahi antenna nui i kūkulu ʻia i loko o ka tunnel tomograph. Ua hoʻohālikelike au i ka kūlike o ka hōʻailona ma ka ʻāpana i hōʻike ʻia e ka rectangle. Ma kekahi kiʻekiʻe, ʻoi aku ka maikaʻi o ka metamaterial ma mua o ka coil ma ke ʻano o ka like ʻana o ka hōʻailona. No nā kumu lāʻau lapaʻau, ʻaʻole paha kēia he mea koʻikoʻi koʻikoʻi, akā i ka wā e pili ana i nā hoʻonohonoho MRI ʻepekema kahi e nānā ʻia ai nā ʻiole, hiki iā ia ke kōkua i ka hoʻonui ʻana i ka hōʻailona a me ka emi ʻana o ka mana koi o nā pulse radio hoihoi.
E pili ana i "hoʻomaikaʻi ʻia e 2 mau manawa" i ka hoʻomaka ʻana o ka ʻatikala - ʻoiaʻiʻo, ʻo kēia kekahi hua o ke aloha ʻole o ka poʻe nūpepa no ka poʻe ʻepekema, akā naʻe, hewa ʻole ka ʻōlelo ʻana he noiʻi ʻole kēia, i kākoʻo ʻia e ka hoihoi kēia kumuhana i nā hui ʻepekema a puni ka honua. ʻO ka mea kupanaha, ke hana ʻia nei ka hana ma ʻaneʻi ma Rūsia, ʻoiai ma muli o kaʻu ʻike pilikino ponoʻī, he mea ʻokoʻa kēia. Nui nā pilikia i hoʻoponopono ʻole ʻia e pili ana i ka hoʻohana ʻana i nā metamaterial ma MRI. Ma waho aʻe o ka localizing magnetic field e kiʻi i kahi kiʻi maikaʻi, mai poina e pili ana i nā māla uila e alakaʻi ai i ka hoʻomehana ʻana o ka ʻiʻo, a me ka absorption o ka radiofrequency field energy e nā ʻiʻo o nā mea maʻi e hoʻokolokolo ana. No kēia mau mea, i ka hoʻohana lāʻau lapaʻau, pono e loaʻa kahi mana kūikawā, e lilo i mea paʻakikī loa i ka wā e hoʻohana ai i nā resonators-localizing. I kēia manawa, noho mau nā metamaterials no MRI i loko o ke ʻano o ka noiʻi ʻepekema, akā ʻoi aku ka hoihoi o nā hopena i loaʻa a hiki paha i ka wā e hiki mai ana, mahalo iā lākou, e loli ke kaʻina MRI no ka maikaʻi, e wikiwiki a palekana.
Source: www.habr.com