Which of the following imaging findings is the most characteristic for hepatic abscesses？ （）

Which of the following imaging findings is the most characteristic for hepatic abscesses？ （）
A.CT showed a low-density mass in hepatic parenchyma
B.Hepatic parenchymal mass showed hypointensity on T1WI and hyperintensity on T2WI
C.CT can show a ring on the borders of the mass and small gas-bubbles inside
D.The margin of the mass was significantly enhanced on contrast-enhancement scan
E.Multiple masses
正确答案：CT can show a ring on the borders of the mass and small gas-bubbles inside