Computed tomography in the management of cerebrovascular disease
The radiological technique of computed tomography (CT) used in neurological diagnosis of vascular diseases of the brain is explained, and its application to specific clinical situations is described. Cerebral infarcts of varying ages can be visualized, with a recent ischemic infarct appearing as a region of decreased density. Hemorrhagic infarcts in acute and subacture stages also can be visualized, and the advantage to the patient is that the procedure is virtually without risk. CT is the procedure of choice in confirming a diagnosis of hemorrhage into the brain parenchyma or into the ventricular system. Hematomas not readily detectable by conventional angiography may be demonstrated by CT, particularly if they are large. Cerebral aneurysms and arteriovenous malformations cannot be detected by CT unless calcification or clotted blood is present. However, several radiologists have noted enhancement of the diagnostic capability for both neoplasms and vascular lesions such as aneurysms and AV malformations, when an intravenous infusion of angiographic contrast material is started prior to the scan. It is noted that considerable technical skill is required to keep CT equipment operating properly, and photographs of scans may be made a part of the patients's clinical record. An attachment to this document corrects an error on a previous technical assistance memorandum. (GRA)
- Research Organization:
- American Neurological Association, Washington, DC. Joint Committee for Stroke Facilities
- DOE Contract Number:
- PHS-HSM-110-69-436
- OSTI ID:
- 7309695
- Report Number(s):
- HRP-0008791
- Country of Publication:
- United States
- Language:
- English
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