Fig. 3From: Comprehensive SPECT/CT system characterization and calibration for 177Lu quantitative SPECT (QSPECT) with dead-time correctionSchema (a) and pictures (b, c) of cylindrical phantoms used in SPECT acquisitions with capillary sources. The Air-3D phantom is shown in b while the CTDI-10 phantom is shown in c. Starting from the centre, the capillaries were added successively (up to three capillaries per hole)Back to article page