Podcast
Questions and Answers
Which classification of artifacts in CT is characterized by lines that suggest a specific directional influence?
Which classification of artifacts in CT is characterized by lines that suggest a specific directional influence?
What type of artifact in CT imaging appears as variations in density rather than distinct lines or patterns?
What type of artifact in CT imaging appears as variations in density rather than distinct lines or patterns?
Which type of artifact can often create circular patterns or rings in CT images?
Which type of artifact can often create circular patterns or rings in CT images?
What is the primary characteristic that distinguishes 'rings and bands' artifacts from 'streak' artifacts in CT imaging?
What is the primary characteristic that distinguishes 'rings and bands' artifacts from 'streak' artifacts in CT imaging?
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Which of the following options is NOT a classification for artifacts in CT?
Which of the following options is NOT a classification for artifacts in CT?
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Study Notes
Artifacts in CT Scans
- Artifacts in computed tomography (CT) scans can be broadly categorized by their cause and visual presentation.
Types of CT Artifacts
-
Streak artifacts: These artifacts appear as linear, high-density streaks within the image.
- Common causes include:
- Improper collimation
- Metallic objects in the scanning field
- Improper beam hardening
- Severe beam non-uniformity
- Common causes include:
-
Shading artifacts: These artifacts create varying shades or densities within the image.
- Causes can be:
- Patient motion during the scan
- Irregularities in the detector array
- Partial volume effects
- Causes can be:
-
Rings and bands: These artifacts manifest as circular or band-like structures within the image.
- Possible origins:
- Sensor defects in the detector
- Non-uniformities or instability in the x-ray tube
- Electronic interference
- Possible origins:
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Description
This quiz explores the various artifacts encountered in computed tomography (CT) scans, highlighting their causes and visual presentations. Topics covered include streak artifacts, shading artifacts, and rings and bands, as well as the factors leading to these issues. Ideal for students and professionals in medical imaging and radiology.
