radiopaque contrast medium的用法和樣例：
例句
- Hypercalcaemia and hyperphosphataemia were absent, and there was no history of barium study or oral contrast ingestion.
患者無高鈣血症和高磷血症，也無鋇劑檢查或口服造影劑的歷史。 - After injection of contrast, small tumors are actually drowned by contrast material, so in this case CEUS is not helpful.
在注入造影劑后，小的腫瘤竟然被造影劑所掩蓋，因此對比增強超聲在這個病例中就顯得不是那麼有用了。
