Fig. 7From: Design and implementation of a prototype head and neck phantom for the performance evaluation of gamma imaging systemsSPECT and SPECT-CT images in the sagittal plane showing the deeper simulated SLNs (0.5–1.0 MBq) and the simulated thyroid gland in a and b; images c and d show the simulated superficial SLNs at the parotid gland level (0.1–0.2 MBq)Back to article page