PMC9803625_01
Anterior (A) and posterior (B) views of the planar whole-body diagnostic Iodine-131 scan, showing linear focus of tracer activity in the neck region on anterior view (A, arrow). Static anterior planar image of the head region (C) after cleaning the area with corresponding transaxial hybrid SPECT/CT image (D) showing no abnormal focus of tracer activity. The mask was wrapped in a plastic bag to avoid contamination (E) and its static planar image revealed a linear focus of tracer activity (F, arrow)
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F1
He underwent a whole-body radioiodine (I-131) diagnostic scan and images acquired after 48 hours of radioiodine (~1.5 mCi) administration (Figure 1) revealed abnormal linear tracer activity in the anterior neck region (Figure 1A, arrow). To confirm this suspicion, the contaminated surgical face mask was imaged under the gamma camera using adequate precautions by wrapping the mask in a plastic bag to avoid contamination which showed a linear streak of faint tracer activity (Figure 1F, arrow).