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Coil Gradient ee MRI

Sharaxaad Gaaban:

Cabbirka waa la habeyn karaa iyadoo loo eegayo shuruudaha macaamilka.


  • Awoodda goob -joogga:

    25mT/m

  • Toosinta tooska ah:

    % 5%

  • Waqtiga kac:

    ≥0.3ms

  • Heerka beddelka:

    ≥80mT/m/ms

  • Faahfaahinta Alaabta

    Calaamadaha alaabta

    Hordhaca alaabta

    Nidaamka baarista MRI, shaqaynta gariiradda dabacsan ayaa inta badan ah in la xaqiijiyo dejinta meeleynta. Marka la sawirayo sawirka, X, Y, iyo Z coil-gradient saddex-dhinac ayaa wada shaqeeya si ay u qabtaan xulashada jeex, dejinta soo noqnoqda iyo dejinta wejiga siday u kala horreeyaan. Marka dabayshu ka gudubto gariiraddaas waxaa la abuurayaa meel magnet oo labaad ah. Aaggan jajaban ayaa waxoogaa carqaladeeya aagga magnetka ugu weyn ee qaab la saadaalin karo, taasoo keenaysa soo noqnoqodka soo -noqnoqda ee protons -ka inuu ku kala duwan yahay shaqo ahaan booska. Shaqada koowaad ee jaangooyooyinka, sidaa darteed, waa inay oggolaadaan dejinta meeraha ee calaamadda MR. Xirmooyinka qallafsan ayaa sidoo kale muhiim u ah farsamooyin badan oo "fiyooloji" ah, sida MR angiography, faafinta, iyo sawiridda cadar.

    Isla mar ahaantaana, gariiradda wejiga ayaa sidoo kale mas'uul ka ah shaqada shimming iyo anti-eddy hadda

    Shirkadeena waxay siisaa gariirooyin jajaban oo jajaban oo leh waxqabad wanaagsan, kaas oo dabooli kara baahiyaha isticmaalka.

    Marka laga eego dhinaca qaab dhismeedka, wejigan fadhiga ah wuxuu leeyahay X, Y, Z gariiradda saddex gees leh, si fududna ugu xirmi kara, waxaana lagu qalabeyn karaa nidaamka qaboojinta biyaha, kaas oo si wax ku ool ah u qaboojin kara xarigga wejiga iyo sawiridda xasillooni badan;

    Waxa kale oo loo qaabayn karaa sida gariiraha wejiga ee si firfircoon loo gaashaanto si loo sii yareeyo qulqulka qulqulka ee isha. Sababtoo ah habka ugu wax -ku -oolka badan ee lagu xakamayn karo qulqulka qulqulka ayaa ah in marka hore laga hortago soo -saaridda durdurrada eddy. Tani waa dhiirrigelinta lagu horumarinayo gaashaamidda firfircoon (is-gaashaan-dhigga) jajabka; kan hadda ku jira gariiradda gaashaan waxaa loo adeegsadaa inuu u ordo jihada ka soo horjeedda gariiradda dabacsanaanta sawirka si loo yareeyo durdurrada eddy. Coil gradient ee sidan loo sameeyay waa mid la isku halleyn karo oo waara.

    Halbeegyada Farsamo

    1. Xoogga wejiga: 25mT/m

    2. Toosinta tooska ah: <5%

    3. Waqtiga kaca: ≥0.3ms

    4. Heerka beddelka: ≥80mT/m/ms

    Cabbirka waa la habeyn karaa iyadoo loo eegayo shuruudaha macaamilka


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  • Alaabooyinka La Xiriira