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Typical Doses of Intravenously Administered Diagnostic Agents and Radiotracers from High (CT) to Low (PET).
| Imaging Modality | Human dose (g) |
|---|---|
| CT | 75 cc of 930 mM solution (≈ 800 Da) = 56 g |
| MRI | 15 cc of 500 mM solution (≈ 940 Da) = 7 g |
| 2 regular-strength acetaminophen (bioavailable dose) = 600 mg | |
| Optical | ≈ 10 cc of 1 mM solution (≈1,000 Da) = 10 mg |
| FDA definition of “micro-dosing” = 100 μg | |
| SPECT | 20 mCi (10,000 Ci/mmol; ≈500 Da) = 1 μg |
| PET | 20 mCi (10,000 Ci/mmol; ≈500 Da) = 1 μg |
