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Degree of visualization of the ipsilateral MCA on brain MRA was graded as follows: all M3 branches of the left MCA could be visualized to the cortical surface (grade A), one M3 branch could not be visualized to the cortical surface (grade B, arrow), one M2 branch could not be visualized along its course (grade C, arrow), and the M1 could not be visualized along its course (grade D, arrow).
