{"entity":{"id":"mri","kind":"technology","name":"MRI","aka":[],"tldr":"MRI uses a strong magnet and radio waves, with no ionising radiation, to picture soft tissue in finer contrast than CT, so it is the standard scan for brain tumours, prostate, rectal cancer staging, liver lesions and breast screening in high-risk women. It is slow, expensive and blurred by movement.","summary":"Superior soft-tissue contrast makes MRI the standard for brain tumours, prostate (multiparametric MRI with PI-RADS), rectal cancer staging, liver lesions, breast screening in high-risk women, and bone marrow. Diffusion-weighted imaging adds cellularity information. Whole-body MRI is used in myeloma and for radiation-free surveillance.","status":"standard-of-care","asOf":"2026-09-04","wikipedia":"https://en.wikipedia.org/wiki/Magnetic_resonance_imaging","links":[{"label":"Wikipedia","url":"https://en.wikipedia.org/wiki/Magnetic_resonance_imaging"}],"tags":[],"related":["mri-field-strengths","intraoperative-mri-ct"],"cancers":[],"sections":["imaging"],"technologies":[],"targets":[],"drugs":[],"companies":["adialante","monteris-medical","siemens-healthineers","ge-healthcare","philips","canon-medical","united-imaging","fujifilm"],"institutions":[],"pathways":[],"terms":[],"trials":["takahashi-pci"],"people":[],"bottlenecks":[],"keyPapers":[],"journals":["cancer-imaging","radiology-imaging-cancer"],"dependsOn":[],"notes":[],"principle":"Proton spin alignment in a strong magnetic field; radiofrequency excitation and relaxation times (T1, T2) encode tissue properties. Gadolinium contrast shows perfusion.","strengths":["No ionising radiation","Best soft-tissue and brain imaging","Functional sequences (diffusion, perfusion)"],"limitations":["Slow and expensive","Motion artefacts","Gadolinium concerns in renal impairment"],"since":1977},"route":"/technologies/mri/","neighbours":{"technology":[{"id":"radiology-ai-screening","kind":"technology","name":"AI in radiology","route":"/technologies/radiology-ai-screening/"},{"id":"angiogenesis-models","kind":"technology","name":"Angiogenesis and vascular normalisation models","route":"/technologies/angiogenesis-models/"},{"id":"breast-mri-coils-abbreviated-mri","kind":"technology","name":"Breast MRI coils and abbreviated breast MRI","route":"/technologies/breast-mri-coils-abbreviated-mri/"},{"id":"medical-imaging-scanner-manufacturing","kind":"technology","name":"CT, MRI and PET scanner 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