Convert Millicuries to Rutherfords
Convert Millicuries (mCi) to Rutherfords (Rd) instantly and accurately.
Conversion Formula
Rd = mCi × 37
About Millicuries
The millicurie (mCi) equals 3.7 × 10⁷ Bq = 37 MBq. The primary clinical nuclear medicine unit in the US: ¹⁸F-FDG PET doses are 8-15 mCi; ⁹⁹mTc cardiac stress tests use 25-35 mCi; ¹³¹I hyperthyroidism therapy uses 5-30 mCi. US pharmacopeia and NRC regulations specify doses in mCi. 1 mCi = 3.7 × 10⁷ Bq.
About Rutherfords
The rutherford (Rd) equals exactly 10⁶ Bq = 1 MBq. Proposed by Ernest Rutherford and adopted at the 1946 Montreal Conference on Radioactivity as a convenient unit for large sources. Superseded by the MBq in SI but still encountered in older nuclear physics and reactor engineering literature. 1 Rd = 10⁶ Bq.
Quick Reference Table
| Millicuries (mCi) | Rutherfords (Rd) |
|---|---|
| 1 mCi | 37 Rd |
| 2 mCi | 74 Rd |
| 5 mCi | 185 Rd |
| 10 mCi | 370 Rd |
| 25 mCi | 925 Rd |
| 50 mCi | 1850 Rd |
| 100 mCi | 3700 Rd |