[一名儿童的放射剂量 sparing 评估] （注：这里“sparing”不太明确准确意思，可能是“ sparing effect”之类的表述，整体“放射剂量 sparing 评估”表述不太常规，需结合更完整语境理解）

Radiologische Abteilung, A-2620 Neunkirchen.

Ultraschall Med. 1992 Apr;13(2):88-9. doi: 10.1055/s-2007-1005282.

In a seven-year old girl who had swallowed a big coin, the position of the foreign body in the stomach was demonstrated sonographically by means of the technique of the fluid filled stomach. Endoscopic removal after 48 hours was arranged without x-ray examination.