医生在CT扫描中发现了一个假性动脉瘤，需要立即治疗。

The doctor found a ___pseudoaneurysm on the CT scan that required immediate treatment.

超声检查显示他的动脉损伤处形成了一个假性动脉瘤，需要立即治疗。

The ultrasound revealed a ___pseudoaneurysm at his arterial injury site, requiring immediate treatment.