CT colonography
E387404
CT colonography is a minimally invasive imaging test that uses CT scanning and computer software to create detailed views of the colon and rectum, primarily for colorectal cancer screening and polyp detection.
All labels observed (1)
| Label | Occurrences |
|---|---|
| CT colonography canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3777658 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: CT colonography Context triple: [CT scanner, canPerform, CT colonography]
-
A.
Colon Classification
Colon Classification is a faceted library classification system developed by S. R. Ranganathan that organizes knowledge using a combination of basic subject categories and auxiliary facets.
-
B.
CT
CT is a 3GPP core network and terminals working group responsible for specifying protocols and interfaces for mobile telecommunications systems.
-
C.
CT
CT is the official two-letter United States Postal Service abbreviation for the state of Connecticut.
-
D.
CT
CT is the postcode area covering Canterbury and surrounding parts of east Kent in southeastern England.
-
E.
MDCT
MDCT (Modified Discrete Cosine Transform) is a time-frequency transform widely used in modern audio compression formats to efficiently represent sound with reduced data.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: CT colonography Target entity description: CT colonography is a minimally invasive imaging test that uses CT scanning and computer software to create detailed views of the colon and rectum, primarily for colorectal cancer screening and polyp detection.
-
A.
Colon Classification
Colon Classification is a faceted library classification system developed by S. R. Ranganathan that organizes knowledge using a combination of basic subject categories and auxiliary facets.
-
B.
CT
CT is the official two-letter United States Postal Service abbreviation for the state of Connecticut.
-
C.
CT
CT is a 3GPP core network and terminals working group responsible for specifying protocols and interfaces for mobile telecommunications systems.
-
D.
CT
CT is the postcode area covering Canterbury and surrounding parts of east Kent in southeastern England.
-
E.
MDCT
MDCT (Modified Discrete Cosine Transform) is a time-frequency transform widely used in modern audio compression formats to efficiently represent sound with reduced data.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
colorectal cancer screening test
ⓘ
diagnostic test ⓘ medical imaging procedure ⓘ |
| canDetect |
colonic strictures
ⓘ
colorectal cancer ⓘ colorectal polyps ⓘ diverticulosis ⓘ extracolonic findings ⓘ |
| contrastUse |
mayUseIntravenousContrast
ⓘ
mayUseOralContrastTagging ⓘ |
| examinesAnatomicalRegion |
colon
ⓘ
rectum ⓘ |
| hasLowerRiskOf | colonic perforation compared with optical colonoscopy ⓘ |
| hasSynonym | virtual colonoscopy ⓘ |
| imageDimension |
2D
ⓘ
3D ⓘ |
| insufflationMedium |
air
ⓘ
carbon dioxide ⓘ |
| interpretedBy | radiologist ⓘ |
| isAlternativeTo | optical colonoscopy ⓘ |
| isLessInvasiveThan | optical colonoscopy ⓘ |
| isMinimallyInvasive | true ⓘ |
| limitation |
cannot remove detected polyps
ⓘ
reduced sensitivity for very small polyps ⓘ |
| performedBySpecialty | radiology ⓘ |
| potentialRisk |
discomfort from colonic insufflation
ⓘ
radiation exposure ⓘ |
| primaryPurpose |
colorectal cancer screening
ⓘ
colorectal polyp detection ⓘ |
| recommendedBy | some colorectal cancer screening guidelines ⓘ |
| reconstructionTechnique |
3D endoluminal fly-through
ⓘ
multiplanar reformations ⓘ |
| requiresBowelPreparation | true ⓘ |
| requiresFollowUpColonoscopyIfPositive | true ⓘ |
| requiresSedation | false ⓘ |
| screeningInterval | every 5 years in some guidelines ⓘ |
| screeningPopulation | average-risk adults for colorectal cancer ⓘ |
| secondaryPurpose |
assessment after incomplete optical colonoscopy
ⓘ
evaluation of unexplained gastrointestinal symptoms ⓘ |
| typicalExaminationTime | 15–30 minutes ⓘ |
| usesInsufflation | true ⓘ |
| usesModality | computed tomography ⓘ |
| usesRadiation | ionizing radiation ⓘ |
| usesTechnology |
CT scanner
ⓘ
computer-aided image reconstruction software ⓘ |
| visualizesStructure |
colonic lumen
ⓘ
colonic wall ⓘ pericolonic tissues ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: CT colonography Description of subject: CT colonography is a minimally invasive imaging test that uses CT scanning and computer software to create detailed views of the colon and rectum, primarily for colorectal cancer screening and polyp detection.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
CT scanner