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  • Title: Quick diagnosis of hyperthyroidism with semiquantitative 30-minute technetium-99m-methoxy-isobutyl-isonitrile thyroid uptake.
    Author: Kao CH, Wang SJ, Liao SQ, Lin WY, Hsu CY.
    Journal: J Nucl Med; 1993 Jan; 34(1):71-4. PubMed ID: 8418274.
    Abstract:
    Ten normal volunteers and 14 patients with hyperthyroidism had pinhole thyroid imaging 30 min after an intravenous injection of 10 mCi 99mTc-MIBI. Technetium-99m-MIBI thyroid uptake was calculated by the formula: [total counts with a region of interest (ROI) over the whole thyroid gland] divided by [(mean counts of every pixel in the neck soft tissue) x (total number of pixels in ROI over the whole thyroid gland)]. The results showed that the 30 min 99mTc-MIBI thyroid uptake ratios had positive relationships with the 24 hr 131I-thyroid uptake (r = 0.79), and that the patients with hyperthyroidism had significantly higher 30 min 99mTc-MIBI thyroid uptake than the normal volunteers (5.31 +/- 0.78 s.e.m. versus 2.35 +/- 0.14 s.e.m., p < 0.005 using the Mann-Whitney U-test). Technetium-99m-MIBI thyroid uptake may be useful for the rapid diagnosis of hyperthyroidism.
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