(1)腦實(shí)質(zhì)腦白質(zhì)與腦灰質(zhì)相比,含水量少而含脂量多,其T1值和T2值較腦皮質(zhì)短,在T1WI上腦白質(zhì)信號(hào)高于腦灰質(zhì),在T2WI上則低于腦灰質(zhì)。腦實(shí)質(zhì)內(nèi)有一些鐵質(zhì)沉積較多的神經(jīng)核團(tuán)如蒼白球、紅核、黑質(zhì)及齒狀核等,在高場(chǎng)T2WI上呈低信號(hào),在 (共 694 字) [閱讀本文] >>
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 (1)腦實(shí)質(zhì)腦白質(zhì)與腦灰質(zhì)相比,含水量少而含脂量多,其T1值和T2值較腦皮質(zhì)短,在T1WI上腦白質(zhì)信號(hào)高于腦灰質(zhì),在T2WI上則低于腦灰質(zhì)。腦實(shí)質(zhì)內(nèi)有一些鐵質(zhì)沉積較多的神經(jīng)核團(tuán)如蒼白球、紅核、黑質(zhì)及齒狀核等,在高場(chǎng)T2WI上呈低信號(hào),在 (共 694 字) [閱讀本文] >>