Magnetic resonance imaging (MRI)

Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique used in radiology to generate detailed pictures of internal structures and physiological processes within the body[1][4][5]. MRI employs strong static and gradient magnetic fields along with radiofrequency waves to excite hydrogen nuclei, primarily in water and fat, and then detects the resulting signal to form high-resolution images[1][3][6]. Unlike X-ray and CT scanning, MRI does not use ionizing radiation[1][4][5]. Applications include diagnosis, staging, and follow-up for numerous diseases, especially neurological, musculoskeletal, and cardiovascular conditions[2][4][5][6]. While not a biological target, MRI can utilize contrast agents such as gadolinium-based drugs to improve imaging in certain cases[3][6]. Notable safety concerns relate to magnetic fields' interactions with implants, heating effects, and contrast agent toxicity in vulnerable populations[6].

Other names

Nuclear magnetic resonance imagingNMRIMRI scan

Contrast agents: alter local magnetic properties to enhance image contrast in target tissues[3]