magnetic resonance imaging
Let an agent explain how MRI works and what it shows, relay its main techniques and safety rules from radiological sources, describe functional MRI and research uses, and route personal questions about scans to clinicians.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain how MRI works and what it shows, relay its main techniques and safety rules from radiological sources, describe functional MRI and research uses, and route personal questions about scans to clinicians.
A medical imaging technique that uses strong magnetic fields, magnetic field gradients and radio waves to produce detailed images of organs and tissues without ionising radiation, based on nuclear magnetic resonance of hydrogen nuclei, with specialised forms such as magnetic resonance angiography of vessels, cardiac MRI, magnetic resonance myelography of the spinal canal, and functional MRI including event-related and resting-state fMRI that map brain activity through blood oxygenation; MRI is central to neurology, oncology, musculoskeletal and cardiac diagnosis.
What it is for: Imaging the body without ionising radiation.
It can be explain physics and images; relay techniques; relay safety rules; route personal questions.
Distinguishing features
No ionising radiation
Soft tissue contrast
Multiple contrasts and sequences
Functional imaging
What it looks like
A large tube-shaped scanner producing greyscale cross-sectional images.
Physical character
clinical field strength: 1.5 or 3 tesla - typical
first human MRI: 1977 year
scan duration: about 15-60 minutes
How it is recognised
Imaging by nuclear magnetic resonance
Structural MRI, MRA, cardiac MRI, MR myelography, fMRI including event-related and resting-state
CT uses X-rays; ultrasound uses sound; PET uses radiotracers
Related models
is a kind of - in registry terms
is a kind of - in registry terms
is based on - of hydrogen nuclei
is contrasted with - which uses X-rays
In practice
Families and kinds
structural MRI with T1, T2 and other contrasts
magnetic resonance angiography
cardiac magnetic resonance
magnetic resonance myelography and spine imaging
diffusion and perfusion MRI
functional MRI: task-based, event-related and resting-state
MR spectroscopy
Identifiers
MeSH D008279 magnetic resonance imaging
Standards and regulation
MR safety standards such as IEC 60601-2-33
Medical device regulation of scanners and contrast agents
Radiology appropriateness criteria
Failure modes and hazards
Ferromagnetic projectile and implant hazards
Gadolinium contrast concerns
Agents interpreting personal scans
Overinterpretation of fMRI findings
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What MRI is.
Science.
Physics
Physics.
Physics
Physics.
- How does MRI use magnetic fields, gradients and radio waves to form images? definition
- Is the question about MRI, CT, ultrasound or PET? boundary
Techniques
Techniques.
Techniques
Techniques.
- What are MRA, cardiac MRI, MR myelography, diffusion imaging and fMRI, and what does each show? definition
- Which entry fits the specific technique? action
Clinical Clinical use.
Clinical.
Uses
Uses.
Uses
Uses.
- When is MRI used in neurology, oncology, cardiology and musculoskeletal medicine, in general terms? provenance
- Is the user asking about their own scan or results, which needs their clinician? boundary
Experience
Having a scan.
Experience
Experience.
- What happens during a scan, and how are contrast agents used? provenance
- Which references are standard? provenance
Safety Safety.
Regulation.
Safety
Safety rules.
Safety
Safety.
- What safety rules apply for implants, metal objects and pregnancy? provenance
- Which sources are cited? provenance
Contrast
Contrast agents.
Contrast
Contrast.
- What are gadolinium contrast agents, and what concerns exist, with attribution? provenance
- Which entry fits MRI contrast agent? action
Context Research and history.
Context.
Research
fMRI research.
Research
Research.
- How do event-related and resting-state fMRI map brain function, and what are their limits, with attribution? provenance
- Which entry fits functional MRI? action
History
History.
History
History.
- How was MRI developed by Lauterbur, Mansfield, Damadian and others? provenance
- Which entry fits the history of MRI? action
What the second pass must settle
- Should functional MRI and MRA be separate primary entries?
- How should radiological references be linked?
- The registry entry has merged aliases naming techniques; should they be split off?