Thyroid Volume Predictor
Estimates thyroid volume from technetium-99m uptake test gamma counts, as a low-cost alternative when volumetric (SPECT-CT) imaging is unavailable. Each estimate includes a 90% prediction interval.
Gamma count of the full syringe before injection
Residual count of the syringe after injection
Count measured over the thyroid after uptake
Total thyroid uptake percentage (both lobes)
Comma or dot decimals accepted
— mL
estimated thyroid volume
0300 mL
90% prediction interval: —
Estimates come from a model trained on 100 patients (cross-validated MAE ≈ 39 mL) and are not a substitute for volumetric imaging or clinical judgment.
Values separated by commas, semicolons or spaces. Comma decimals accepted (e.g. 8,5).
Upload a .csv or .xlsx file — 4 columns in order: FULL, EMPTY, THYROID, UPTAKE RL (header row optional)
Marinelli Dose Calculator
Required radionuclide activity for thyroid therapy from desired dose, gland mass and uptake (Marinelli formula, Iodine-131 by default).
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Note: this calculator reproduces the formula used in clinical routine at the originating department; independent validation of its scaling is pending. Verify against your local protocol before clinical use.
MBq ⇄ mCi Converter
Exact definition: 1 mCi = 37 MBq. Type in either field.
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