CT contrast scan
CT angiography scan is a method of first angiography of organs or structures, and then scanning. For example, injecting 8-10 ml of iodotrexam into the cerebral cistern or injecting 4-6 ml of air into the cerebellar angiography and then scanning, which is called a cerebrospinal angiography CT scan, can clearly show the cerebral cistern and its small tumors.
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