Fig. 5

Enhancements of iodinated contrast medium (ICM) by digital variance angiography with low dose (DVA-LD) depict significantly increased contrast-to-noise ratio (CNR) in comparison to conventional digital subtraction angiography with low dose (DSA-LD) acquisitions (***p < .001). CNR differences of DVA-LD compared to DSA with normal dose (DSA-ND) acquisitions were not significant (n.s.).