%0 Journal Article %A Di Yan %A Mohan Doss %A Ranee Mehra %A Rosaleen B. Parsons %A Barton N. Milestone %A Jian Q. Yu %T False-Positive Scalp Activity in 131I Imaging Associated with Hair Coloring %D 2013 %R 10.2967/jnmt.112.117416 %J Journal of Nuclear Medicine Technology %P 43-45 %V 41 %N 1 %X A patient with metastatic papillary thyroid carcinoma (after surgical resection of tumor and positive lymph nodes) undergoing thyroid ablation therapy with 131I is described. Whole-body scintigraphy was performed 1 wk after ablation therapy to evaluate the presence of residual disease. The whole-body images demonstrated an artifact caused by tracer accumulation in the patient’s scalp related to recent hair coloring. Common etiologies of false-positive 131I scintigraphic findings are briefly reviewed. The importance of taking preventative measures to decrease the number of false-positive findings and recognizing these findings when they occur is discussed. %U https://tech.snmjournals.org/content/jnmt/41/1/43.full.pdf