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Thyroid-Uptake Studies Using ¹³²I

Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts

William Ashburn

San Diego County-University Hospital, University of California, San Diego, California

Correspondence: For reprints contact: B. S. Levy, Dept. of Psychiatry, Massachusetts General Hospital, 32 Fruit St., Boston, Mass. 02114.

ABSTRACT

There are a number of clinical situations in which ¹³²I can be substituted for ¹³¹I in radioiodine thyroid-uptake determinations. Serial determinations are possible using ¹³²I with a significant reduction in the absorbed thyroid radiation compared with similar administered quantities of ¹³¹I. Repeat uptake values are reproducible and correlate well with other measurements of thyroid function in normals and hyperthyroid individuals. No special equipment is required so that ordinarily available counting equipment can be used.