Igiceri cya Gradient kuri MRI
Muri sisitemu yo gusikana ya MRI, imikorere ya gradient coil ni ukumenya kodegisi. Mugihe cyo gusikana ishusho, X, Y, na Z ibice bitatu byingirakamaro bikora hamwe kugirango bikore ibice, guhitamo inshuro nyinshi hamwe na kodegisi. Iyo umuyoboro unyuze muri ibyo biceri urwego rwa kabiri rukuruzi. Umwanya wa gradient uhinduranya gato magnetiki yumurima muburyo buteganijwe, bigatuma resonance yinshuro ya proton itandukana nkigikorwa cyumwanya. Igikorwa cyibanze cya gradients rero, nukwemerera kodegisi yerekana ibimenyetso bya MR. Igiceri cya Gradient nacyo kirakenewe muburyo butandukanye bwa "physiologique", nka MR angiography, diffuzion, hamwe no kwerekana amashusho.
Mugihe kimwe, igiceri cya gradient nacyo gishinzwe imikorere ya shimming na anti-eddy
Isosiyete yacu itanga plaque-plaque gradient coil hamwe nibikorwa byiza, bishobora guhaza ibikenewe gukoreshwa.
Uhereye ku buryo bw'imiterere, iki gipimo cya tekinike gifite X, Y, Z ibice bitatu bya gradient, byoroshye guhuza, kandi birashobora kuba bifite sisitemu yo gukonjesha amazi, ishobora gukonjesha neza igiceri cya gradient no gukora amashusho bihamye;
Irashobora kandi gushushanywa nkigikoresho gikingiwe cyane coil kugirango igabanye kugabanuka kwa eddy kuva isoko. Kuberako uburyo bwiza cyane bwo kugenzura imiyoboro ya eddy ni ukurinda ibisekuruza byambere. Ninimpamvu yo guteza imbere gukingira (kwikingira) gradients; ikigezweho muri coiling coil ikoreshwa mugukoresha muburyo bunyuranye kumashusho ya gradient coil kugirango igabanye eddy. Igiceri cya gradient cyakozwe murubu buryo cyizewe kandi kiramba.
1. Imbaraga za Gradient: 25mT / m
2. Umurongo ugereranije: <5%
3. Guhaguruka igihe: ≥0.3ms
4. Igipimo cyo guhindura: ≥80mT / m / ms
Ingano irashobora gutegurwa ukurikije ibyo umukiriya asabwa