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Figure 1: (a) Diagnostic Iodine 131 scan showed local uptake of 2%, her whole body scan was however negative. (b) Post therapy scan (Day 8), apart from the local uptake revealed the classical “Helmet Sign” an artifact caused by diffuse tracer accumulation in the patient's scalp. (c) Post therapy scan (Day 11), after a hair wash with a medicated shampoo showed a decrease in scalp activity

Figure 1: (a) Diagnostic Iodine 131 scan showed local uptake of 2%, her whole body scan was however negative. (b) Post therapy scan (Day 8), apart from the local uptake revealed the classical “Helmet Sign” an artifact caused by diffuse tracer accumulation in the patient's scalp. (c) Post therapy scan (Day 11), after a hair wash with a medicated shampoo showed a decrease in scalp activity