幫忙看這個MRI報告

INDICATION: A 73-year-old with evaluation of right-sided headache and
memory loss.

TECHNIQUE: Multiplanar, multisequence imaging of the brain was
performed.

FINDINGS: The midline structures are intact. The craniocervical
junction is intact. There is a partial empty sella which is a normal
variant. Corpus callosum is mildly thinned. Bone marrow signal is
within normal limits. There is no diffusion abnormality. There is
age-appropriate atrophy. There is no abnormal mass, hemorrhage or
midline shift. There is no abnormal extra-axial fluid collection. Old
left cerebellar stroke. Major vascular flow voids are intact.

Visualized orbits and visualized paranasal sinuses are within normal
limits. There are scattered subcortical white matter changes that are
nonspecific.

IMPRESSION:
1. Old left cerebellar stroke.
2. Nonspecific subcortical white matter changes.

這個‘Nonspecific subcortical white matter changes'是什麽意思？為什麽會有白色物質？

所有跟帖： 

• 這種圖像特征老年人比較常見 -viewfinder- ♀ (188 bytes) () 02/05/2015 postreply 09:57:45

• 我媽血壓高，一直在吃降壓藥。血糖血脂都正常。 -rioswonder- ♀ (0 bytes) () 02/05/2015 postreply 10:10:46

• 主要是現在她老是忘記事兒，不知道這個報告看不看得出來老年癡呆？腦白質和老年癡呆有關嗎？ -rioswonder- ♀ (0 bytes) () 02/05/2015 postreply 10:13:44

• 用這個診斷不了老年癡呆 -viewfinder- ♀ (0 bytes) () 02/05/2015 postreply 11:32:34

• white matter 是腦子組成部分之一（另一組成部分稱“腦灰質” gray matter) -20146- ♀ (0 bytes) () 02/05/2015 postreply 10:00:59

• 老年人很多有腦白質改變，不一定就有問題。要確診老年癡呆，還要做有關認知的問卷調查。 -ssll- ♀ (0 bytes) () 02/05/2015 postreply 11:06:19

• 哦，謝謝！已經約了神經專科醫生，到時候要求問卷調查。 -rioswonder- ♀ (0 bytes) () 02/05/2015 postreply 12:32:57