WebBackground and purpose: Magnetic resonance imaging is part of the diagnostic criteria for Alzheimer's disease (AD) through the evaluation of hippocampal atrophy. The objective of … WebT1WIT2WI,al or corT1WI,h a slice thic3.F,he contrast medium w.CTas performed using the 64-oCT(OCT660;GEHhcar),om the base of skull to the level of thoracic inle.Tscan was …
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WebJun 20, 2024 · MRI:纤维环在T1WIT2WI序列均显示低信号,信号低于椎体信号,髓核T1WI低信号,T2WI高信号。 退变后水分消失后呈低信号。 L1-2至L4-5的椎间盘形态大致相同,呈肾形,后缘内凹,老年人可平直。 L5-S1椎间盘后缘平直,可轻度微膨出。 黄韧带厚约3-5mm,超过5mm为增厚。 椎间盘膨出椎间盘突出的原因:椎间盘退变,外伤(扭伤、跌 … Web常用脉冲序列与其应用. 第十一页,共48页。. f二、快速自旋回波序列. • 1.序列构成 快速自旋回 波(fast spin-echo;FSE. 或turbo SE;TSE)序列. 与多回波序列一样,也是. 在一 … WebAug 27, 2024 · 一、头颅MRI T1WI:脑脊液呈低信号,脑白质的信号高于灰质; T2WI:脑脊液呈高信号,脑白质的信号低于灰质。 二、腹部MRI T1WI:椎管内脑脊液、胃肠道液体 … the queen\u0027s gambit moves