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1·AIM: To study the value of oral ferric ammonium citrate (FAC) solution as a negative gastrointestinal contrast agent in MR urography (MRU).

目的：研究枸橼酸铁铵作为胃肠道阴性对比剂对改善磁共振尿路成像(MRU)质量的价值。

2·The change of sodium ferric EDTA and carbonyl iron was not great, but most of ferric sulfate and ferric ammonium citrate became insoluble during storage.

乙二胺四乙酸铁钠和元素羰基铁粉在贮藏过程中变化不大，而硫酸亚铁和柠檬酸铁铵在贮藏过程中绝大部分变成了不溶性铁。