Convert Megabecquerels to Curies
Convert Megabecquerels (MBq) to Curies (Ci) instantly and accurately.
Conversion Formula
Ci = MBq × 2.702702703e-5
About Megabecquerels
The megabecquerel (MBq) equals 10⁶ Bq and is the standard clinical nuclear medicine unit outside the US. ⁹⁹mTc bone scans use 740 MBq; ¹⁸F-FDG PET scans use 370 MBq; ¹³¹I diagnostic thyroid scans use 185-370 MBq. European and Australian protocols specify all doses in MBq. 1 MBq = 10⁶ Bq.
About Curies
The curie (Ci) equals exactly 3.7 × 10¹⁰ Bq = 37 GBq, originally defined as the activity of 1 g of ²²⁶Ra. Still widely used in the US: ⁶⁰Co teletherapy sources are 5000-15000 Ci; ¹³⁷Cs blood irradiators are 1000-40000 Ci; NRC source licences for industrial radiography cite Ci limits. 1 Ci = 3.7 × 10¹⁰ Bq.
Quick Reference Table
| Megabecquerels (MBq) | Curies (Ci) |
|---|---|
| 1 MBq | 2.703 × 10-5 Ci |
| 2 MBq | 5.405 × 10-5 Ci |
| 5 MBq | 0.000135135 Ci |
| 10 MBq | 0.00027027 Ci |
| 25 MBq | 0.000675676 Ci |
| 50 MBq | 0.00135135 Ci |
| 100 MBq | 0.0027027 Ci |