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Nonvisualization of suppressed thyroid tissue on Tl-201 scintigraphy
1Division of Nuclear Medicine, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania 19107.
Clinical Nuclear Medicine
|November 1, 1993
Summary
Thallium-201 (Tl-201) scintigraphy may fail to visualize suppressed thyroid tissue in cases of toxicosis. Ultrasound imaging is a valuable tool for differentiating thyroid suppression from agenesis in such scenarios.
Area of Science:
- Endocrinology
- Nuclear Medicine
- Radiology
Background:
- Autonomously functioning thyroid nodules can suppress normal thyroid tissue.
- Thallium-201 (Tl-201) scintigraphy is a common method for visualizing suppressed thyroid tissue.
- Previous reports suggest Tl-201 scintigraphy sensitivity is comparable to Iodine-123 (I-123) scanning.