N'ime usoro nyocha MRI, ọrụ nke eriri gradient bụ ọkachasị iji ghọta ngbanwe oghere. Mgbe ị na-enyocha onyonyo a, eriri igwe gradient ụzọ atọ nke X, Y na Z na-arụkọ ọrụ ọnụ iji mee nhọrọ iberi, ntinye koodu ugboro na ntinye usoro n'otu n'otu. Mgbe nke ugbu a na-agafe n'oku ndị a, a na-emepụta oghere magnetik nke abụọ. Ogige gradient a na-agbagọ ntakịrị oghere magnetik n'ụdị a na-atụ anya ya, na-eme ka resonance ugboro nke proton dị iche iche dị ka ọrụ nke ọnọdụ. Ya mere, ọrụ bụ isi nke gradients bụ ikwe ka ngbanwe oghere nke mgbama MR. Ọkpụkpụ gradient dịkwa oke egwu maka ọtụtụ usoro “physiologic” dị iche iche, dị ka MR angiography, mgbasa ozi, na onyonyo perfusion.

N'otu oge ahụ, eriri gradient na-ahụkwa maka ọrụ nke shimming na mgbochi eddy current

Ụlọ ọrụ anyị na-enye eriri gradient dị larịị na-arụ ọrụ nke ọma, nke nwere ike gboo mkpa nke iji.

Site n'echiche nhazi, gradient a dị larịị nwere eriri gradient atọ nke X, Y, Z, dị mfe ijikọ, yana enwere ike ịkwado ya na sistemu mmiri jụrụ oyi, nke nwere ike ime ka eriri gradient dị mma nke ọma wee mee onyonyo. ka kwụsie ike;

Enwere ike chepụta ya dị ka eriri gradient nke na-arụsi ọrụ ike iji wedata eddy ugbu a site na isi mmalite. N'ihi na ụzọ kachasị dị irè isi chịkwaa ikuku mmiri bụ igbochi ọgbọ nke ikuku mmiri mbụ. Nke a bụ mkpali ịmepụta ihe nchebe na-arụ ọrụ (nkedo onwe ya) gradients; A na-eji ihe dị ugbu a dị na mkpuchi mkpuchi na-agba ọsọ n'akụkụ nke ọzọ na eriri gradient imaging iji belata mmiri ozuzo. Igwe gradient emere n'ụzọ dị otú a bụ nke a pụrụ ịdabere na ya ma na-adịgide adịgide.