Fig. 7
From: MDCT of blunt renal trauma: imaging findings and therapeutic implications
a–b Active arterial contrast extravasation from a capsular artery (lesion not included in the AAST classification). On these 3-mm-thick multiplanar reconstruction (MPR) axial images acquired during the arterial (a) and nephrographic (b) phases of the study in the same patient, a large perirenal haematoma (star) determining a ventral dislocation of the kidney is clearly recognisable. No parenchymal lacerations can be observed, but an active contrast material extravasation (arrow) is recognisable within the haematoma during the arterial phase, showing a mild increase in size during the nephrographic phase as a consequence of a capsular artery rupture