tomography
Let an agent explain the principle of tomography and the mathematics of reconstruction, identify the many modalities and their uses, relay safety and standards for medical and industrial imaging, and route clinical questions to professionals.
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 the principle of tomography and the mathematics of reconstruction, identify the many modalities and their uses, relay safety and standards for medical and industrial imaging, and route clinical questions to professionals.
Imaging by sections, reconstructing the interior of an object from measurements taken from many directions, using penetrating waves or fields such as X-rays, gamma rays, radio waves, electrons, sound, electrical currents, light or cosmic-ray muons; the family includes medical computed tomography and PET, industrial CT, seismic and ocean acoustic tomography, electrical impedance tomography and muon tomography.
What it is for: Seeing inside objects without cutting them.
It can be explain the principle and reconstruction; identify modalities and uses; relay safety and standards; route clinical questions.
Distinguishing features
Sectional reconstruction
Projection measurements from many angles
Wide range of physical probes
Medical, industrial and scientific uses
What it looks like
Not a single object; scanners and sensor arrays producing cross-sectional images.
Physical character
first clinical CT scan: 1971 year - Hounsfield
mathematical basis: Radon transform, 1917 reference
How it is recognised
Reconstruction of sections from projections
Many modalities by physical probe
Plain radiography and ultrasound imaging without reconstruction are not tomography
Related models
is a kind of - the broad category
is a kind of - in registry terms for X-ray forms
includes - the best-known modality
relies on - the mathematics
In practice
Families and kinds
X-ray computed tomography, medical and industrial
positron emission and single-photon emission tomography
magnetic resonance imaging as tomography
electrical impedance and capacitance tomography
acoustic, seismic and ocean tomography
optical, fluorescence and photoemission orbital tomography
muon tomography
electron tomography
Standards and regulation
Radiation protection rules for medical and industrial CT
Medical device regulation
DICOM and imaging standards
Dose reference levels
Failure modes and hazards
Radiation dose in X-ray modalities
Reconstruction artefacts
Misinterpretation of images
Agents interpreting personal scans
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.
Principle How tomography works.
Science.
Reconstruction
Reconstruction.
Reconstruction
Reconstruction.
- How are sections reconstructed from projections, from filtered back-projection to iterative methods? definition
- Is the technique tomography or another imaging method? boundary
Modalities
Modalities.
Modalities
Modalities.
- What modalities exist, by physical probe and application? definition
- Which entry fits the specific modality? action
Medical Medical imaging.
Clinical.
Uses
Clinical uses.
Uses
Uses.
- How are CT, PET, SPECT and MRI used in diagnosis, in general terms? provenance
- Is the user asking about their own scan, which needs their clinician? boundary
Safety
Dose and safety.
Safety
Safety.
- What do radiation protection bodies say about dose and justification? provenance
- Which entry fits radiation protection? action
Other Industry and science.
Practice.
Industrial
Industrial CT.
Industrial
Industrial.
- How is industrial CT used for inspection and metrology? provenance
- Which entry fits non-destructive testing? action
Science
Scientific tomography.
Science
Science.
- How do seismic, ocean acoustic, muon and electron tomography work and what have they revealed? provenance
- Which references are standard? provenance
Context History and research.
Context.
History
History.
History
History.
- How did tomography develop from Radon and early focal-plane methods to CT and beyond? provenance
- Which entry fits the history of medical imaging? action
Research
Research directions.
Research
Research.
- What are current research directions, such as photon-counting CT and machine learning reconstruction? provenance
- Which entry fits image reconstruction? action
What the second pass must settle
- Should each modality be a separate entry?
- How should standards be linked?
- The registry entry has merged aliases naming many modalities; should they be split off?