当影像增强器由头倾位向足倾位旋转时，右冠状动脉主干逐渐伸展。
When the image intensifier was rotated from cranial to caudal, the main part of RCA was observed to have a extending trend.
当影像增强器由头倾位向足倾位旋转时，右冠状动脉主干逐渐伸展。
When the image intensifier was rotated from cranial to caudal, the main part of RCA was observed to have a extending trend.
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