Abstract
Thyroid scintigraphy in evaluation of congenital hypothyroidism is acquired with gamma camera rotated in posterior view and the newborn in prone position with the neck extended. Administered activity of radiotracer is very low (adjusted to the patient’s weight, according to EANM dosage card and to the national regulations). Thyroid uptake measurements are performed at 2, 10, and 15 min after an intravenous injection of 99mTc-pertechnetate. Lateral image has to be performed when an ectopic sublingual thyroid uptake is detected. Thyroid uptake is determined using a dedicated software by calculating syringe counts (before and after radiopharmaceutical injection) and counts present in the thyroid (drawing regions of interest around the gland borders and just below the gland for background subtraction).
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Pizzoferro, M., Villani, M.F., Ubertini, G., Garganese, M.C. (2017). Endocrinology: Congenital Hypothyroidism. In: Garganese, M., D'Errico, G. (eds) Conventional Nuclear Medicine in Pediatrics. Springer, Cham. https://doi.org/10.1007/978-3-319-43181-9_24
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DOI: https://doi.org/10.1007/978-3-319-43181-9_24
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