Preliminary Study on the Application of Ultrahigh Field Magnetic Resonance in Moyamoya Disease

Figure 1

A 47-year-old male with sudden onset of slurred speech 2 months before admission and no history of intracranial hemorrhage. SWI sequence (a) illustrated that hemorrhagic foci were found in the posterior corner of the right lateral ventricle, and round low signal could be seen in the axial position of the SWI sequence. Bilateral brush signs can be clearly found in the bilateral centrum semiovale on the SWI sequence. By merging the TOF-MRA and SWI (c) sequences, it can be inferred that the cause of hemorrhage may be the rupture of the choroidal artery branch(white arrow). TOF-MRA (b) sequence showed a very high coincidence with DSA (d).

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