Fig. 5.

Schematic illustration of the embolic behavior of EVOH-based LEAs and PHIL. Compared with the EVOH-based LEAs Onyx and Squid (illustrated as black material), which feature a rather lava-like behavior, with solidification from the outside to the inside, PHIL (illustrated as white material) solidifies and moves rather like a column. This phenomenon has to be considered when assessing opacified blood vessels during embolization. For Onyx and Squid, an opacified blood vessel might still be centrally perfused, and consequently not completely embolized, while for PHIL, an opacified blood vessel should be completely occluded. These observations, however, are based on early clinical reports and experimental studies and were not yet systematically investigated