Figure 5.

52 years female, papillary thyroid carcinoma classic variant. Thyroglobulin 1000; radioiodine cumulative dose 7400 MBq. Fused hybrid and simple CT head and neck images. (A–C) show ⁶⁸ Ga – PSMA PET/CT sagittal (A, C) and axial (B) views in soft tissue (A, B) and brain windows (C); while (E–G) demonstrate ¹³¹I – SPECT/CT images in homologous reconstructions. Notice how PSMA PET/CT illustrates more intraparenchymal metastatic lesions, which also show higher tracer uptake than ¹³¹—SPECT/CT. It also can be visualize a bone lytic lesión in frontal bone. Images on the right represent simple CT sagittal recontructions in brain (D) and bone (H) windows, where morphologic aspects of the lesions are better characterized.