Kujambula kwa maginito a resonance (MRI) ndi imodzi mwa njira zofunika kwambiri zojambula zachipatala masiku ano.Imagwiritsa ntchito maginito amphamvu ndi ma radiofrequency pulses kuti ipeze zithunzi zowoneka bwino zamagulu amunthu, zomwe zimagwira ntchito yofunika kwambiri pozindikira matenda ambiri.Komabe, zojambulira zachikhalidwe za MRI zimakhala ndi kachubu kakang'ono, zomwe zimakakamiza odwala kuti agonebe mumsewu wopapatiza panthawi yojambula.Izi zimabweretsa kupsyinjika kwakukulu m'maganizo, makamaka kwa ana, akulu, ndi odwala omwe ali ndi claustrophobia, chifukwa kugona mkati mwa ngalande yotsekedwa kumakhala kovuta kwambiri.Komanso, phokoso lalikulu limapangidwa mosalekeza panthawi ya MRI, zomwe zimawonjezera kukhumudwa kwa odwala.Ma scanner otsegula a MRI adapangidwa kuti apititse patsogolo chidziwitso cha odwala.
Chinthu chachikulu cha MRI yotseguka ndi maginito ake ooneka ngati C kapena O omwe amapanga mwayi wotsegula mbali zonse za bore.Odwala amaikidwa pamalo otseguka kuti athe kuwona chilengedwe chakunja m'malo motsekedwa pamalo opapatiza.Izi zimachepetsa kwambiri nkhawa za odwala komanso kumva kukhala m'ndende.Kuonjezera apo, MRI yotsegula imapanga phokoso la 70 decibels, kutsika kwa 40% kuchokera ku ma decibel 110 a makina ojambulira amtundu wa MRI, zomwe zimapangitsa kuti pakhale kusanthula kosavuta.
Wooneka ngati C
Wooneka ngati O
Pankhani yazigawo zamakina, MRI yotseguka imasunga magawo apakati a MRI scanner, kuphatikiza maginito akuluakulu omwe amapanga mphamvu ya maginito yolimba, ma coil a gradient omwe amapanga minda ya gradient, ndi ma coil a RF kuti asangalatse ndi kuzindikira ma sign.Mphamvu yam'munda ya maginito yayikulu mu MRI yotseguka imatha kufikira 0.2 mpaka 3 Tesla, molingana ndi MRI wamba.MRI yotseguka imaphatikizanso zida zowonjezera zothandizira odwala ndi njira zopangira ma docking kuti zigwirizane ndi mawonekedwe otseguka komanso zofunikira za odwala.Ponseponse, ndikuwongolera chidziwitso cha odwala, MRI yotseguka imasungabe mfundo zazikuluzikulu za kujambula kwa maginito ndipo imatha kuperekabe zithunzi zamtundu wamunthu.
Poyerekeza ndi MRI yachikhalidwe yotsekedwa, MRI yotsegula ili ndi ubwino wotsatirawu:
1. Amachepetsa kwambiri mantha a claustrophobic.Mapangidwe otseguka amaonetsetsa kuti odwala samamva kuti ali mkati mwa ngalande yopapatiza, zomwe zimapatsa malo odekha makamaka kwa ana, okalamba, kapena odwala claustrophobic.Izi zimathandizira kutsata ndikulola kuti apeze masikeni apamwamba kwambiri.
2. Phokoso locheperako kwambiri, lolola masikelo omasuka.Kutsegula kwa phokoso la MRI ndi pafupi 40% kutsika kuposa machitidwe otsekedwa.Phokoso lochepetsedwa limachepetsa nkhawa za odwala, kulola nthawi yayitali yojambula komanso kupeza mwatsatanetsatane kujambula.
3. Zowonjezereka komanso zopezeka kwa odwala onse.Kupezeka kotseguka komanso phokoso locheperako kumapangitsa kuti kuwunika kukhale kosavuta kwa anthu oyenda panjinga, odwala machira, kapena omwe ali ndi vuto loyenda.Ma scanner otsegula a MRI amatha kusanthula odwala mwachindunji popanda kusamutsidwa kwathupi komanso m'maganizo.
4. Imathandizira mapulogalamu olowera.Mapangidwe otseguka amapereka mwayi wosavuta kwa odwala panthawi yojambula, kuwongolera njira zothandizira motsogozedwa ndi MRI.Madokotala amatha kuchita opaleshoni odwala nthawi yeniyeni kwinaku akungoganizira za malo ochitira chithandizocho.
Pali zoletsa zina za MRI yotseguka poyerekeza ndi machitidwe otsekedwa:
1. Ubwino wazithunzi ukhoza kutsika pang'ono, makamaka pakusiyanitsa kwa minofu yofewa ndikusintha.Mapangidwe otseguka amatanthauza kuti mphamvu ya maginito imakhala yosafanana kwambiri kuposa masilinda achikhalidwe otsekeredwa, zomwe zimatsogolera kutsika kwa gradient linearity komanso kutsika komaliza kwa chithunzi.Izi ndizodziwika kwambiri pama scanner ochepera otsika a MRI.Makanema otseguka a 1.5T kapena 3T amatha kubweza kusagwirizana kwamunda ndi kapangidwe kapamwamba kakunyezimira komanso kugunda kwa mtima.Koma mwachidziwitso, masilinda otsekedwa nthawi zonse amathandiza kuti minda ikhale yabwino komanso yofanana.
2. Kusajambula bwino kwa odwala onenepa kwambiri chifukwa cha maginito ambiri.Odwala onenepa kwambiri amakhala ndi kuchuluka kwa thupi, ndipo mawonekedwe otseguka amavutikira kuti azitha kuphimba maginito awo.Makina ojambulira amtundu wa MRI amangofunika kukhathamiritsa kuchuluka kwa malo pamalo ang'onoang'ono a cylindrical, zomwe zimapangitsa kuti pakhale zotsatira zabwino kwa odwala akuluakulu.Koma ogulitsa a MRI otseguka akugwira ntchito pazosintha zosinthidwa makonda monga kutseguka kwa odwala komanso mphamvu zamphamvu zakumunda kuti athe kuthana ndi izi.
3. Mapangidwe ovuta kwambiri omwe amatsogolera ku mtengo wapamwamba wogula ndi kukonza.Mapangidwe otseguka amafunikira maginito ovuta komanso ma gradient ma coil geometries, limodzi ndi makina osamalira odwala.Kuchulukirachulukiraku kumapangitsa kuti pakhale mtengo wokwera kwambiri poyerekeza ndi maginito ozungulira omwe ali ndi mphamvu zofananira.Kuphatikiza apo, mawonekedwe osagwirizana ndi maginito a MRI otseguka amawapangitsa kukhala ovuta kuwayika mkati mwa zipatala zomwe zidapangidwa kuti zibowole za MRI.Kukonzekera kwa nthawi yayitali ndi kudzaza helium kumakhalanso kokwera mtengo chifukwa cha chikhalidwe cha machitidwe otseguka a MRI.Koma kwa odwala omwe amapindula kwambiri ndi mapangidwe otseguka, ndalama zowonjezerazi zingakhale zomveka.
Mwachidule, makina otsegula a MRI amagonjetsa zofooka za machitidwe a MR omwe amatsekedwa ndipo amathandizira kwambiri chitonthozo ndi kuvomereza kwa odwala.Amapereka malo ochezera ochezeka omwe amapindulitsa odwala ambiri.Ndikupita patsogolo kopitilira, MRI yotseguka ipeza kugwiritsidwa ntchito kwakanthawi kwachipatala, makamaka kwa odwala omwe ali ndi nkhawa, ana, okalamba, komanso odwala omwe sakuyenda bwino.
