A patient wearing the mandatory face mask because of the ongoing coronavirus disease 2019 pandemic underwent postradioiodine therapy scintigraphy. The spot view of the neck showed an area of uptake that was later demonstrated to be caused by contamination of the mask. This finding has led to updating the scan procedure for posttherapy scintigraphy by replacing the patients' masks before the scan acquisition.
Keywords: 131I; artifact; face mask; posttherapy scintigraphy.
© 2021 by the Society of Nuclear Medicine and Molecular Imaging.