.52 Cases Of Subarachnoid Hemorrhage And 100 Cases Of Normal Brain Ct Contrast

Objective: Contrast study of CT on normal cranial and the subarachnoid hemorrhage to improve the ability to definite diagnosing promptly of SAH.Methods: 52 CT scanning cases of SAH were collected, which were definitely diagnosed as such by correlation with their repeated CT scanning. In addition, 100 cases of normal cranial CT scanning were gathered consecutively from our department for comparison. Axial CT scanning were performed in all of them. The cerebral falx and the interhemispheric fissure cistern were divided into superior, anterior and posterior segments by the corpus callosum and the lateral ventricles according to Zimmerman's description.Results: SAH were presented real image of brain cistern and brain sulcus; Hemorrhage in the interhemispheric fissure cistern presented as a slightly widening hyperdense line; zigzag hyperdense line; elongation of hyperdense line within the anterior segment of the interhemispheric fissure, which was longer than 25mm or half the depth of the genu; thickening of the tentorial incisure margin.Conclusion: CT has a high specificity in SAH diagnosis, thus it is considered as the first -choice auxiliary examination method for clinical diagnosis.