In-theem (IP) thiab tawm-ntawm-theem (OOP) cov kab ke sib raug rau kev sib koom ua ke ntawm MRI gradient ncha (GRE) cov kab ke tau txais nrog tib lub sijhawm rov ua dua (TR) tab sis nrog ob lub sijhawm sib txawv (TE) qhov tseem ceeb.
Dab tsi yog theem tawm ntawm theem?
Yog ob yam tshwm sim hauv / tawm ntawm theem lawv mus txog qhov qub lossis lwm theem ntawm tib lub sijhawm / sib txawv.
Koj ua li cas sib txawv ntawm theem thiab tawm theem?
Yog tias ib qho ntawm ob lub suab nthwv dej ntawm tib zaus hloov pauv los ntawm ib nrab lub voj voog txheeb ze rau lwm qhov, kom ib nthwv dej ntawm nws qhov siab tshaj plaws thaum lwm qhov yog ntawm nws qhov tsawg kawg nkaus amplitude, lub suab nthwv dej tau hais tias "tawm ntawm theem." Ob lub nthwv dej uas tawm ntawm theem raws nraim tshem tawm ib leeg thaum ntxiv ua ke.
Dual echo MRI yog dab tsi?
Dual echo thiab multiecho sequences tuaj yeem yog siv kom tau txais ob qho tib si proton ceev thiab T2-hnyav cov duab ib txhij. Ob qhov sib txawv ntawm kev txaus siab nyob rau hauv spine echo sequences yog lub sij hawm rov ua dua (TR) thiab lub sij hawm ncha (TE).
Kev hloov tshuaj lom neeg hauv MRI yog dab tsi?
Cov tshuaj hloov pauv tshwm sim yog hais txog lub teeb liab siv kev hloov pauv pom nyob rau hauv magnetic resonance(MR) cov duab uas tshwm sim los ntawm qhov sib txawv ntawm qhov sib txawv ntawm cov resonant zaus ntawm precessing protons. Kev hloov tshuaj lom neeg yog thawj zaug lees paub tias yog kev sau npe tsis raug ntawm cov ntaub ntawv duab.
