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Discovery CT750 uses Garnet detector material for clearer imaging and _____ radiation exposure
less
Radon developed the mathematical principles of CT in _____
1917
The density at a given point on an image represents the x-ray attenuation properties within the patient along a _____ between the x-ray focal spot and the point on the detector
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With a conventional radiograph, information with _____
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Plain film imaging reduces 3D patient anatomy to a _____ projection image
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What did Radon prove in 1917?
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What does plain film imaging reduce the 3D patient anatomy to?
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What is the main advantage of the Discovery CT750?
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What does the density at a given point on an image represent?
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What were the mathematical principles of CT first developed for?
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Study Notes
CT Scan Overview
- CT Scan is used for diagnostics
- Uses radiation to take X-Rays (slices) of the body
- Takes slices and turns them into 3D images
History
- Alessandro Vallebona (Italy) had the idea of taking slices of the body for imaging (Tomography) in the early 1900's
- First CT Scan performed in 1971
- CT Scanners installed in 1974
- Godfrey Hounsfield (Britain) and Allan Comrack (South Africa) credited as inventors of the CT scan
State of the Art
- Widely prevalent and increased use over the past 20 years
- Unnecessary CT Scans have become a concern
- 3D imaging and better clarity compared to traditional imaging methods
CT Scan vs MRI
- CT Scans are usually cheaper
- Typically better at showing bones than MRI
- Less effective at showing soft tissue
- Takes around 5 minutes, while MRI takes around 30 minutes
- Can be harmful to the patient, unlike MRI which has no known biohazards
- Both used for detecting cancer
Limitations
- Higher radiation exposure needed for better clarity
- Human error in reading scans
- Not very good at depicting soft tissue
- Requires moving the patient to change the image plane, unlike MRI
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Description
Test your knowledge of computed tomography (CT) scans with this quiz covering the history, principles, and applications of CT imaging. Learn about the inventors, the technology, and the uses of CT scans for diagnostic imaging.
