Cardiac workup was normal and MR angiogram revealed only mild narrowing of posterior cerebral artery.心脏检查正常,磁共振血管造影示左侧大脑后动脉轻度狭窄.The follow - up coronary angiogram 3 months later showed patent RCA.在3个月后做冠状动脉摄影追踪,显示通畅的右冠状动...
本文研究高屈光度眼用透镜消除离轴像散的非球面化模式.In this paper, model of aspherisation for higher - dioptry spectacle lens is investigated.在腔内插入一定厚度的布儒斯特片可以部分消除腔的像散.The resonator ( astigmatic ) can be compensated by inserting a suitable thickn...