低管电压结合低剂量对比剂在多层螺旋CT头颅动脉血管成像中应用的可行性研究
저관전압결합저제량대비제재다층라선CT두로동맥혈관성상중응용적가행성연구
The feasibility study of low tube voltage combined with low contrast dose in multi-slice CT skull arteriography
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