Materials and Methods:20 patients were evaluated: acute intracranial bleeding in 13 patients and chronic progressive diease in 7. 19 patients underwent CT before DSA,2 MRI before DSA, 1 MRI after DSA.

• 资料和方法：20例病人急性颅内出血起病13例，病情缓慢进展7例，20例DSA检查前有19例行CT检查，2例行MRI检查，1例在DSA检查后行MRI检查。