| MRA | magnetic resonance angiography; main renal artery; marrow repopulation activity; medical record anal... |
|---|---|
| MRD | maximum rate of depolarization; measles-rindenpest-distemper [virus group]; medical records departme... |
| MRI | machine-readable identifier; magnetic resonance imaging; medical records information; Medical Resear... |
| MRL | medical records librarian; Medical Research Laboratory |
| MRT | magnetic resonance tomography; maximum relaxation time; median range score; median reaction time; me... |