Make photographic speed, lumbar positive rate, but due to unhealthy position to make a film drop this law, can not stand and the loss of balance between those who have certain limitations.

  • 正侧位均采用立位投照,使摄影速度加快,腰椎阳性检出率提高,可是因体位不正使甲片率下降,此法对不能站立者失平衡者有一定局限性。

  • 互联网摘选 2025-01-20 11:53:01

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