一、减影技术在脑血管造影检查中的应用在脑血管造影x线照片上,颅骨影像与血管影像重迭,由于投照角度的原因,有时可掩盖脑血管病变而造成诊断上的困难;或由于曝射条件过高使照片过黑,而影响照片上血管影像的对比度。为了提高脑血管造影x 线照片的分辨能力,使脑血管影像清晰,减影技术在一定程度上可消减骨骼和软组织 First, subtraction in cerebral angiography in the application of angiography in angiography, skull imaging and vascular images overlap, due to the reasons for the vote, and sometimes can cover the cerebrovascular disease caused by the diagnosis of difficulties; Or because the exposure conditions are too high to make the picture darker, affecting the contrast of the blood vessel images on the photograph. In order to improve the ability of cerebral angiography x-ray resolution, so that cerebral vascular images clear, subtraction technology to some extent, can reduce bone and soft tissue