Figure 5:Radioiodine imaging of thyroid cancer metastases using thyroxin withdrawal for 4 weeks. WB imaging was performed at 70 h p.i.. The administered oral acivity was 3.632 GBq. (Side view, lower extremities distally). There is a minor uptake above the left ankle. Side view reveals a skin contamination dorsally above distal achilles tendon, the activity was 0.18% of whole body activity.