Fig. 5From: Design and implementation of a prototype head and neck phantom for the performance evaluation of gamma imaging systemsCoronal SPECT and SPECT-CT images showing the position of the simulated SLNs (0.1–0.5 MBq) and the simulated thyroid gland (15 MBq) within the phantom (a, b); CT and SPECT-CT images of the midsagittal plane of the head and neck phantom showing the simulated thyroid gland, trachea and cervical spine (c, d)Back to article page