**14. CEUS for monitoring renal interventions**

CEUS is a very accurate method to depict blood extravasation after kidney surgery.

In the last years, CEUS became a useful tool for monitoring during and after radiofrequency ablations (RFA) and cryoablation (CA). The CEUS score system for monitoring after these interventions was proposed by Wink et al. [28] in which 0 = no enhancement, 1 = rim enhancement, 2 = diffuse enhancement, 3 = localized enhancement, and 4 = no defect in enhancement. The accuracy of CEUS compared to CE-CT or MRI was lower at 3 months post-treatment, but similar to these procedures at 12 month after [29].
