Sib nqus resonance imaging, feem ntau hu ua MRI, yog ib qho kev kuaj pom tsis zoo uas siv los ntawm cov kws kho mob kom pom cov qauv hauv lub cev.MRI siv cov hlau nplaum muaj zog thiab cov xov tooj cua tsis zoo los tsim cov duab ntxaws ntawm lub cev, cov ntaub so ntswg, thiab cov pob txha.
Hais txog lub tshuab MRI, ib lo lus nug uas feem ntau tshwm sim hauv tib neeg lub siab yog vim li cas chav MRI yuav tsum yog tooj liab?Lo lus teb rau lo lus nug no yog nyob rau hauv lub hauv paus ntsiab lus ntawm electromagnetism.
Thaum lub tshuab MRI tau qhib, nws tsim cov hlau nplaum muaj zog uas tuaj yeem cuam tshuam cov khoom siv hluav taws xob thiab cov tshuab nyob ze.Lub xub ntiag ntawm cov hlau nplaum tuaj yeem cuam tshuam nrog lwm yam khoom siv hluav taws xob xws li khoos phis tawj, xov tooj, thiab cov khoom siv kho mob, thiab tuaj yeem cuam tshuam rau kev ua haujlwm ntawm cov pacemakers.
Txhawm rau tiv thaiv cov cuab yeej no thiab tswj kom muaj kev ncaj ncees ntawm cov khoom siv duab, MRI chamber yog kab nrogtooj liab ntawv ci, uas ua raws li ib tug barrier rau magnetic teb.Tooj liab yog cov conductive heev, uas txhais tau hais tias nws absorbs thiab disperses hluav taws xob lub zog thiab yog zoo ntawm kev xav los yog shielding magnetic teb.
Ib txheej tooj liab nrog rau insulating ua npuas ncauj thiab plywood ua ib lub tawb Faraday nyob ib ncig ntawm lub tshuab MRI.Lub tawb Faraday yog ib lub thawv uas tsim los thaiv electromagnetic teb thiab tiv thaiv kev cuam tshuam nrog cov khoom siv hluav taws xob.Lub Cage ua haujlwm los ntawm kev faib cov nqi hluav taws xob sib npaug thoob plaws qhov chaw ntawm lub tawb, ua kom tsis muaj hluav taws xob sab nraud.
tooj liab ntawv ciNws tsis yog tsuas yog siv rau kev tiv thaiv, tab sis kuj rau hauv av.MRI cov cav tov xav tau cov dej ntws siab kom dhau los ntawm cov coils uas tsim cov hlau nplaum.Cov kwj dej no tuaj yeem ua rau muaj hluav taws xob zoo li qub uas tuaj yeem ua rau cov khoom puas tsuaj thiab ua rau muaj kev phom sij rau cov neeg mob.Cov ntawv ci tooj liab tau muab tso rau ntawm phab ntsa thiab hauv pem teb ntawm MRI chamber los muab txoj hauv kev rau cov nqi no kom nyab xeeb tso rau hauv av.
Tsis tas li ntawd, siv tooj liab los ua cov khoom siv tiv thaiv muaj ntau yam zoo dua li kev tiv thaiv ib txwm muaj.Tsis zoo li cov hlau lead, tooj liab yog cov khoom siv tau yooj yim thiab tuaj yeem tsim tau yooj yim rau hauv ntau cov duab thiab ntau thiab tsawg kom tau raws li qhov tshwj xeeb ntawm chav MRI.Nws kuj yog tus nqi-zoo thiab ib puag ncig tus phooj ywg ntau dua li txhuas.
Hauv kev xaus, MRI chav yog lined nrog tooj liab ntawv ci rau qhov laj thawj zoo.Lub shielding zog ntawmtooj liab ntawv citiv thaiv cov khoom siv duab los ntawm kev cuam tshuam sab nraud ntawm electromagnetic cuam tshuam thaum ua kom cov neeg mob thiab cov neeg ua haujlwm muaj kev nyab xeeb.Cov ntawv ci tooj liab yog ua ke nrog lwm cov ntaub ntawv los tsim ib lub tawb Faraday uas muaj cov hlau nplaum uas tsim los ntawm MRI tshuab kom muaj kev nyab xeeb thiab tswj tau.Tooj liab yog ib qho zoo heev conductor ntawm hluav taws xob, thiab sivtooj liab ntawv cixyuas kom meej tias lub tshuab MRI yog qhov zoo.Yog li ntawd, kev siv cov ntawv ci tooj liab hauv MRI shielding tau dhau los ua qauv kev coj ua thoob plaws hauv kev lag luam kho mob, thiab yog vim li cas.
Post lub sij hawm: May-05-2023