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