magnetic resonance imaging
Advanced neuroimaging technique using magnetic fields and radio waves, universally abbreviated as MRI in clinical practice.
Full Definition
Magnetic resonance imaging (MRI) is a non-invasive imaging technique that uses powerful magnetic fields and radiofrequency pulses to generate detailed images of brain and spinal cord structures. MRI provides superior soft tissue contrast compared to CT scans, making it the preferred modality for evaluating most neurological conditions including stroke, tumors, multiple sclerosis, and degenerative diseases. Various sequences (T1-weighted, T2-weighted, FLAIR, DWI) provide complementary information about tissue characteristics, pathology, and physiological processes. Contraindications include certain metallic implants, and the procedure requires patient cooperation due to noise and confined space during lengthy acquisition times.
Usage
Usage note: Spell out fully in formal documentation headers, abbreviate as MRI in clinical notes; specify contrast use and sequences when relevant.
In Context
- "Magnetic resonance imaging of the brain revealed multiple hyperintense lesions consistent with demyelinating disease." — Radiology report
- "Contrast-enhanced magnetic resonance imaging showed enhancement of the meninges suggesting inflammatory process." — Neuroradiology consultation