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近年来由于X—CT、MRI等脑影像学诊断的 进步,使脑器质性疾病的诊断水平有了很大的提高。与此同时脑循环和代谢的影像学诊断也有了飞速地发展,目前测定局部脑循环和代谢的方法有PET和SPECT两种,特别是SPECT检查在很多医院已经普及,局部脑血流测定已成为常规的临床检查。本文就缺血性脑血管病的临床与脑血流改变的关系介绍如下: 缺血性脑血管病是由于灌注压降低而引起脑组织血流的减少所造成的脑缺血性病变。低灌注压的原因有①全身血压低下;②脑内大动脉(颈内动脉、大脑中动脉等)的狭窄或闭塞而导致进入末
In recent years due to X-CT, MRI and other brain imaging diagnosis of progress, so that the diagnosis of organic brain disease has been greatly improved the level of diagnosis. At the same time, imaging diagnosis of cerebral circulation and metabolism has also been rapidly developed. Currently, there are two methods for determining local cerebral circulation and metabolism, that is, PET and SPECT. In particular, SPECT has been widely used in many hospitals and local cerebral blood flow measurement has become Routine clinical examination. This article on the relationship between ischemic cerebrovascular disease and cerebral blood flow changes are as follows: Ischemic cerebrovascular disease is due to reduced perfusion pressure caused by decreased brain blood flow caused by cerebral ischemic lesions. Low perfusion pressure due to ① systemic blood pressure is low; ② cerebral aorta (internal carotid artery, middle cerebral artery, etc.) stenosis or occlusion and lead into the end