Fig. 12From: A NIM PET/CT phantom for evaluating the PET image quality of micro-lesions and the performance parameters of CTCT value acquisition for image uniformity for (a) background of CT module, (b) boundary between background and purified water, and (c) pure water area. The circles 1–4 represent ROIs 1–4, and the circle “c” represents “ROI-c”Back to article page