脑血管病及颅内感染,脑血管病HEMATOMAINCT血肿的CT表现,Inatially,highattenuation.higherattenuationthanbrainbutlessthanbone(35-80Hu).Overseveraldaystoweeks,gradualdecreaseinattenuation.Hypodensitytocysticcavity.,ACUTEHEMATOMA急性血肿mildedema轻度水肿,SUBACUTEHEMATOMA亚急性血肿,CHRONICHEMATOMA慢性血肿,HEMATOMAINMRI,Acute(deoxyhemoglobin)急性期（脱氧血红蛋白）T1WI:Isointensitytomildhypointense等到低信号T2WI:Veryhighhypointense高信号Earlysubacute(intracellularmethemoglobin)亚急性早期（细胞内高铁血红蛋白）TIWI:Increasinghyper-intensityT2WI:Hypo-intensityinitially,cha
