| NIRNS | National Institute for Research in Nuclear Science |
|---|---|
| NM(ASCP) | Technologist in Nuclear Medicine certified by the American Society of Clinical Pathologists |
| NMT | neuromuscular tension; neuromuscular transmission; N-methyltransferase; N-myristoyltransferase; no m... |
| NMTCB | Nuclear Medicine Technology Certification Board |
| NOE | nuclear Overhauser effect |