Amagagasi amakhulu angakwazi ukuchitha noma ukulimaza amadivayisi athile
Abantu baseMelika abangaphezu kwezigidi ezimbili banesisetshenziswa sezokwelapha esasungulwe lapho amaphesenti angu-50 azodinga ukuhlola okudinga ukucabanga kwe-magnontic resonance (eyaziwa njenge- MRI scan ). I-MRIs isetshenziselwa ukuxilonga nokuqapha izinhlobo eziningi zempilo yezokwelapha, kufaka phakathi izinkinga ze-orthopedic nezinhliziyo zenhliziyo. Kodwa-ke, abantu abanezinhlobo ezithile zokufakelwa kwensimbi bangase bangakwazi ukwenza inqubo.
Isizathu salokhu ukuthi i-MRIs isebenzisa insimu enamandla kakhulu yamandla ukudala izithombe zokuxilonga. Ezinye izimila zensimbi azikwazi ukuphazamisa ukucabanga nje kuphela, zingathinteka kakhulu amagagasi amakhulu amakhulu.
Amandla omsakazo (RF) adalwe yi-MRI angabangela amadivaysi athile ukuthi angasebenzi kahle noma avuke kakhulu, angase alimaze idivayisi futhi akhiphe lowo muntu. Ukuguqulwa nokufuduka kwe-implant nakho kwaziwa ukuthi kwenzeka.
Izimplomelo Kungenzeka Zithintwe yi-MRIs
Izimpande zensimbi ezivame ukubhekana nezinkinga ngesikhathi se-MRIs zihlanganisa:
- i-pacemakers
- ama-valve yenhliziyo
- izimpande zensimbi ebuchosheni bomguli
- izimpande zensimbi esweni lesiguli noma ezindlebeni
- ama-catheters okukhipha
Abantu abaningi abanezinhlobo zezimila azikwazi ukuba ne-MRI. Ngaphezu kwalokho, abantu abalimele izibhamu noma ama-shrapnel, noma labo abasebenza ngezinsimbi, kufanele baxoxwe ngokuqondile ukuze banqume ukuthi i-MRI ingenzeka yini.
Akuzona zonke izimila zensimbi ezithinteka yi-MRI. Abanye baye bahlukaniswa ngokuthi "i-MRI ephephile" kanti abanye babhekwa ngokuthi "i-MRI condition". Eqinisweni, amanye ama-pacemaker amasha kanye nezimpande ze-cochlear zisebenzisa ubuchwepheshe obuphambili futhi kubhekwa sengathi uphephile uma ngaphansi kwamathonya we-MRI.
Izimpande ze-Ferromagnetic Versus Non-Ferromagnetic
Kunezinhlobo ezimbili zensimbi ezisetshenziselwa, noma ingxenye noma yonke, ngezimpande ezithile.
Enye i-ferromagnetic kanti enye ayiyona i-ferromagnetic.
Izitshalo ze-ferromagnetic ezifana ne-iron, i-nickel, ne-cobalt yizo lezo, lapho zifakwa enkundleni yamagnetic, zibe magnet ngokwazo. Lapho lezi zensimbi zingaphansi kwe-MRI, izinkinga zingenzeka.
Okokuqala, i-MRI kanye nensimbi ye-ferromagnetic iba amakethe ahlukene ngamapulisa angalungile. Njengawo wonke amaketha, laba ababili bazokhangwa bese bevumelanisa ngokushesha nokuphambana. Ngomshini owodwa (i-MRI) enesisindo esingamathani amaningana kanti enye (isitshalo se-ferromagnetic) esilinganisa ama-ounces amaningana, ithonya elinamandla elinamandla kakhulu lingenza ukuba ukufakelwa kushintshe, kuphenduke, futhi kuvele kukhishwe ngokuphelele.
Izinsimbi ezingekho-ferromagnetic yilabo abangabi amamitha ngaphansi kwe-MRI. Kodwa lokho akusho ukuthi ngeke babe nezinkinga. Izitshalo ezingekho-ferromagnetic zingasaphazamisa insimu yamagnetic eyenziwe yi-MRI futhi ihlanekeze izithombe ukuze zingakwazi ukufunda kahle.
Ukwengeza, i-RF energy eyakhiwe yi-MRI ingabangela izinkinga nanoma iyiphi insimbi ehamba phambili ngaphakathi kokufakelwa okungeke kube yi-transceiver yomsakazo. Uma lokhu kwenzeka, insimbi ingakwazi ukufaka amandla e-RF bese iqala ukuphuza, ingabangela ukulimaza ukufakwa kanye nanoma yiziphi izicubu ezizungezile.
Izimila zensimbi nokuphepha kwe-MRI
Namuhla, izimila eziningi zensimbi, kuhlanganise nama-prostheses wamathambo kanye nezimila zamazinyo, zenziwe ngezinsimbi eziphephile ze-MRI ezifana ne-titanium. Lokhu kufaka izingxenye zokufaka esikhundleni se-hip kanye namadolo (amapuleti, izikrini, izinduku) kanye nokugcwaliswa kwezigxobo.
Ngenkathi zonke lezi zimila zingaphazamisa isithombeni se-MRI uma siseduze nomzimba womzimba, ngokuvamile ngeke kubangele izinkinga umchwepheshe onokuhlangenwe nakho angakwazi ukunqoba.
Uma kuziwa ngokuphepha kwe-MRI, okubalulekile lokhu: ngaso sonke isikhathi ucebise udokotela wakho kanye nabasebenzi be-MRI nganoma yikuphi ukufakelwa onakho okungeke bakuqaphele. Ngisho noma ucabanga ukuthi ukufakelwa kuyahambisana, kubalulekile ukuvumela ochwepheshe ukuba bazi ukuthi baqinisekise ukuthi kungenzeka ukuthi i-MRI iphephile noma i-MRI condition.
Ezinye izinketho zokucabanga (i- CT scan , i- PET scans ) ingatholakala.
> Umthombo:
> I-American College of Cardiology. "I-MRI yeziguli ezinezimboni ezifakiwe: Izingxabano zamanje - Ukuhlaziywa kochwepheshe." Washington, DC; Agasti 1, 2016.