Post-contrast delayedscan is the key of diagnosis and differential diagnosis.
增强延时扫描是诊断与鉴别诊断的关键。
2
Delayedscan, the hypodense edema ring enhanced and became isodense, or the abscess enhanced diffusely, the lesions became smaller and the colliquative necrosis area more obvious.
延时，脓肿周围低密度水肿环可强化为等密度，或脓肿内部强化，病变范围缩小，液化坏死区更显明显。
3
Enhanced and delayed ct scan not only showed what have been presented in the plain ct scans but also demonstrated 7 cases with external fistula of urine due to injury of collecting systems.