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Sources of artifacts in rotational scanography
Rofo : Fortschritte Auf Dem Gebiete Der Rontgenstrahlen Und Der Nuklearmedizin
|September 1, 1982
Summary
Rotational scanography images can have artifacts from misalignment, vibration, and power fluctuations. Using a constant potential generator eliminates radiographic striations, improving image quality.
Area of Science:
- Medical Imaging
- Radiography
Background:
- Rotational scanography is an emerging imaging technique.
- Image artifacts can compromise diagnostic accuracy in scanography.
Purpose of the Study:
- To identify and categorize artifacts in rotational scanography.
- To investigate the sources of image degradation in this modality.
Main Methods:
- Analysis of image quality in rotational scanography.
- Identification of artifact sources including mechanical and electrical factors.
Main Results:
- Key artifacts include misalignment, density gradients, vibration, and radiographic striations.
- Radiographic striations are linked to the ripple of the x-ray tube output.
- Striations persist with a 12-pulse generator but are eliminated by a constant potential generator.
Conclusions:
- Understanding artifact sources is crucial for optimizing rotational scanography.
- Constant potential generators are recommended to mitigate striations and enhance image quality.