False-positive scalp activity in 131I imaging associated with hair coloring

Di Yan, Mohan Doss, Ranee Mehra, Rosaleen B. Parsons, Barton N. Milestone, Jian Q. Yu

Research output: Contribution to journalArticle


A patient with metastatic papillary thyroid carcinoma (after surgical resection of tumor and positive lymph nodes) undergoing thyroid ablation therapy with 131I is described. Wholebody 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.

Original languageEnglish (US)
Pages (from-to)43-45
Number of pages3
JournalJournal of nuclear medicine technology
Issue number1
StatePublished - Mar 1 2013


  • False-positive uptake
  • Hair coloring
  • I distribution
  • Postablation scan

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging

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  • Cite this

    Yan, D., Doss, M., Mehra, R., Parsons, R. B., Milestone, B. N., & Yu, J. Q. (2013). False-positive scalp activity in 131I imaging associated with hair coloring. Journal of nuclear medicine technology, 41(1), 43-45. https://doi.org/10.2967/jnmt.112.117416