目的评价双剂量法螺旋CT胆道造影(SCTC)及三维重建技术的临床应用价值。
Objective To evaluate double dose contrast medium spiral ct cholangiography (SCTC) and 3d reconstruction technique in clinical applications.
动物研究已经确认高剂量的双酚a是有害的。低剂量也可能存在危害，但是还没有足够的证据让监管部门下定决心对这种化学物质采取措施。
Animal studies have confirmed that high doses are harmful, but some evidence that it may also be harmful at low doses has yet to convince regulators to take decisive action against the compound.
一些主要科学家认为试验数据显示极低剂量双酚a会对动物产生毒性作用，因此他们对该报告所采用的方法提出质疑。
Leading scientists - who argue that their data show bisphenol a produces toxic effects in animals at incredibly low doses - have criticized the way the report has been produced.
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