Endocrine radionuclide scintigraphy with fusion single photon emission computed tomography/computed tomography

Figure 3 Pre-ablation hypothyroid ¹³¹I-radioiodine whole body planar and single photon emission computed tomography-computed tomography scan in a 45-year-old female with papillary thyroid cancer after total thyroidectomy. Anterior (A) and posterior (B) planar images demonstrate a focus of activity in the left thorax (arrow), which is better visualized on the posterior image. Unenhanced axial CT (C), SPECT (D), and SPECT-CT (E) show a 7 mm a radioiodine avid nodule in the lingula (arrow). The utilization of SPECT-CT increases diagnostic certainty in comparison to planar-only imaging evaluation, obviates the need for concurrent diagnostic CT and allows therapeutic evaluation of this nodule after radioactive iodine thyroid treatment. SPECT: Single photon emission computed tomography; CT: Computed tomography.