Fig. 2From: Use of a digital phantom developed by QIBA for harmonizing SUVs obtained from the state-of-the-art SPECT/CT systems: a multicenter study a Phantom configuration of a digital reference object (DRO) and b DRO filtered by a 17-mm Gaussian filter (DRO17Â mm). The square boxes in DRO are by design (not used in the present study)Back to article page