Fig. 2
The 99mTcO4 MIBI dual-phase parathyroid scan detected elevated tracer uptake in the superior lobe of the thyroid in the early phase (a). A 2-h delayed image (b) showed mild retention of the tracer in the same region (black arrows). The SPECT/CT images at 2 h (c: MIP, maximum intensity projection; d: axial CT; e: SPECT; f: fused image) indicated that the focal tracer uptake was located in the right superior thyroid (white arrows). The lesion behind the superior left thyroid was a cystic nodule and had no radioactivity uptake (red arrows)