Characteristics of CT imaging of adult ischemic moyamoya disease / 中国医学装备

ABSTRACT

Objective: To study the characteristics of CT imaging of adult ischemic type moyamoya disease, involving CT plain scan, CT perfusion imaging (CTP) and CT angiography (CTA). Methods:A retrospective analysis was made of the imaging data of 20 adult ischemic type moyamoya patients, including CT plain scan, CT perfusion imaging and CT angiography. CT vascular imaging features were graded I-VI with reference to Suzuki vascular grading. Results:Among the 20 patients with adult ischemic type moyamoya , ①CT plain scan Old infarct lesions occurred in 13 cases(65%), 1 case suffered from acute cerebral infarction(5%), and negative patients totalled 6 (30%);②CT perfusion5 cases(25%) were normal perfusion, 15 cases(75%) showed obviously low perfusion and local high perfusion;③CT angiographypatients of grade I to VI were respectively 1, 2, 5, 6, 4 and 2. Conclusion:Cerebral infarction lesions associated with adult ischemic type moyamoya disease are distributed mainly in the frontal and parietal cortex, or in watershed regions. Cerebral perfusion is characterized by normal or uneven blood perfusion, especially low perfusion. Vascular imaging manifests mostly degree III and IV, which belong to the middle phase of moyamoya disease.