Cov neeg uas cog cov titanium rods puas tuaj yeem kuaj MRI?
Hauv kev phais orthopedic, titanium rods, ua cov khoom siv tseem ceeb rau kev kho tus txha caj qaum thiab kho cov pob txha ntev, tau dhau los ua qhov kev cog lus nyiam vim lawv cov biocompatibility zoo heev thiab txhua yam khoom. Txawm li cas los xij, thaum cov neeg mob xav tau kev kuaj MRI, cov lus nug tseem ceeb tshwm sim: puas yuav cog cov titanium pas nrig cuam tshuam rau kev nyab xeeb thiab cov duab zoo ntawm kev kuaj xyuas? Hauv qab no lo lus nug no yog ib tug complex scientific logic uas muaj xws li cov khoom ntawm metallic cov ntaub ntawv, lub mechanism ntawm magnetic teb kev sib cuam tshuam, thiab kev soj ntsuam kev pheej hmoo.
Cov khoom siv ntawm titanium rods yog qhov tseem ceeb los txiav txim siab lawv MRI kev sib raug zoo. Kev kho mob titanium rods feem ntau yog ua los ntawm cov ntshiab titanium los yog titanium alloys (xws li Ti6Al4V). Cov ntaub ntawv no tsis yog- cov hlau ferromagnetic thiab tsis tsim kom muaj zog txaus nyiam lossis torques hauv cov hlau nplaum zoo li qub. Tsis zoo li cov ntaub ntawv ferromagnetic (xws li hlau thiab npib tsib xee), titanium muaj qhov sib nqus tsis tshua muaj zog, thiab txawm tias thaum muab tso rau hauv 3.0T siab - tshuab MRI, nws yuav tsis hloov lossis deform vim yog qhov sib nqus. Cov ntaub ntawv kho mob qhia tau hais tias tus neeg mob uas muaj titanium pas nrig implanted rau scoliosis nyob rau hauv lub taub hau MRI scan peb xyoos tom qab- kev phais, thiab titanium pas nrig tsis cuam tshuam nrog lub magnetic teb, tso cai rau kev ntsuam xyuas kom zoo. Qhov piv txwv no lees paub qhov ruaj khov ntawm titanium rods hauv magnetic teb.
Txawm hais tias titanium rods lawv tus kheej tsis yog -sib nqus, lawv qhov cuam tshuam rau MRI duab zoo tseem xav tau kev tshuaj xyuas tshwj xeeb. Titanium alloy implants tuaj yeem tsim cov eddy tam sim no hauv cheeb tsam vim lawv cov conductivity, ua rau kom muaj zog nqus ntawm cov xov tooj cua zaus zog thiab ua rau muaj cua sov me ntsis. Cov kev tshawb fawb qhia tias nyob rau hauv 3.0T MRI, qhov kub thiab txias ntawm titanium alloy implants yuav nce los ntawm 1-2 degree, tab sis tus nqi no nyob deb ntawm tus tib neeg kev nyab xeeb pib (4 degree). Tsis tas li ntawd, cov khoom siv hlau ntawm titanium rods tuaj yeem ua rau thaj chaw sib nqus hauv zos inhomogeneity, tshwm sim raws li cov teeb liab poob lossis khoom cuav hauv kev yees duab. Piv txwv li, tus txha caj qaum titanium rods tuaj yeem tsim cov duab ntxoov ntxoo ntawm T2-qhov hnyav ntawm cov vertebrae uas nyob ib sab, tab sis los ntawm kev kho cov kev ntsuas ntsuas (xws li txo lub sij hawm ncha thiab nce bandwidth), kev cuam tshuam ntawm artifacts ntawm kev kuaj mob tuaj yeem txo qis.
Kev txiav txim siab hauv tsev kho mob yuav tsum muaj kev ntsuam xyuas dav dav ntawm hom cog, qhov chaw, thiab qhov chaw kuaj mob. Rau cov titanium rods siv rau kev kho sab hauv ntawm limb fractures, yog tias qhov chaw kuaj mob nyob deb ntawm qhov chaw cog qoob loo (xws li, siv ko taw titanium pas nrig los tshuaj xyuas lub hlwb), feem ntau tsis muaj kev kho tshwj xeeb. Txawm li cas los xij, rau cov neeg mob uas muaj tus txha caj qaum titanium rods, yog xav tau kev soj ntsuam ntawm lub lumbar lossis thoracic txha nraub qaum, cov kws kho mob yuav tsum tau ua ntej 1.5T cov cuab yeej (nrog zoo sib nqus sib nqus homogeneity) thiab siv cov kev soj ntsuam ceev ceev kom luv sij hawm kuaj. Kev ua raws- nce kev kawm ntawm 200 tus neeg mob nrog tus txha caj qaum titanium rods pom tias 98% ntawm cov neeg mob tau ua tiav kev kuaj MRI tom qab kev hloov pauv, tsuas yog 2 qhov yuav tsum tau ncua sijhawm vim kev cog qoob loo. Qhov no qhia tau hais tias los ntawm kev ntsuam xyuas kev tshawb fawb thiab kev ua kom zoo dua qub, kev sib raug zoo ntawm titanium rods thiab MRI tuaj yeem lav tau zoo.
Kev nyab xeeb ntawm tus neeg mob yog lub hauv paus ntsiab lus ntawm kev kuaj MRI. Ua ntej kev kuaj mob, cov neeg mob yuav tsum muab lawv cov kws kho mob nrog cov ncauj lus kom ntxaws txog kev cog qoob loo, suav nrog cov khoom siv, qauv, thiab cov ntaub ntawv phais. Yog tias tsim nyog, lawv yuav tsum tau muab phau ntawv qhia kev cog qoob loo (xws li ASTM-F136 cov ntaub ntawv pov thawj). Rau tsis ntev los no titanium rods implanted (tsis yog tag nrho osseointegrated) los yog cov uas pom cov tsos mob ntawm loosening, cov kws kho mob yuav pom zoo kom lwm yam kev kuaj xws li CT los yog ultrasound. Thaum lub sij hawm kuaj, yog tias tus neeg mob muaj kev kub ntxhov hauv zos lossis mob, lawv yuav tsum ceeb toom rau tus kws kho mob tam sim ntawd kom nres qhov scan. Tsis tas li ntawd, cov thermal conductivity ntawm titanium rods yuav tsum tau muab sau tseg: cov neeg mob uas muaj lub ntsej muag titanium daim hlau yuav tsum tsis txhob siv radiofrequency kev kho mob xws li Thermage los tiv thaiv lub zog tsis sib xws thiab kub hnyiab.
Los ntawm cov ntaub ntawv kuaj mus rau kev kho mob, kev sib raug zoo ntawm titanium rods thiab MRI tau ua tiav tag nrho. Lawv cov khoom tsis yog -ferromagnetic zog, tswj tau cov thermal cuam tshuam, thiab kho cov khoom siv dag zog tau muab lub hauv paus rau kev kuaj xyuas kev nyab xeeb rau cov neeg mob. Txawm li cas los xij, kev txiav txim siab kho mob yuav tsum ua raws li cov kev ntsuas tus kheej ib txwm muaj- los ntawm kev sau keeb kwm kho mob kom ntxaws, kev txheeb xyuas cov ntaub ntawv cog lus, thiab kev ntsuas qhov ntsuas qhov ntsuas kom zoo, cov kws kho mob tuaj yeem ua kom muaj txiaj ntsig zoo tshaj plaws ntawm MRI thaum ua kom muaj kev nyab xeeb. Rau cov neeg mob uas cog titanium rods, tsis tas yuav ncua kev kho mob vim muaj kev txhawj xeeb txog kev pheej hmoo ntawm kev kuaj mob; Kev sib txuas lus kev tshawb fawb thiab kev ntsuam xyuas kev tshaj lij yog "cov yuam sij kev nyab xeeb" txhawm rau txhawm rau txhawm rau kuaj MRI. Nyob rau niaj hnub niaj hnub no ntawm kev nce qib hauv kev kho mob thev naus laus zis, "kev sib haum xeeb ntawm kev sib haum xeeb" ntawm titanium rods thiab MRI yog ib qho piv txwv zoo ntawm kev sib sib zog nqus ntawm cov ntaub ntawv tshawb fawb thiab tshuaj kho mob.
