A simulation study of motion artefacts in computed tomography
| Autor: | S C Orphanoudakis, Chao-Kung Yang, J W Strohbehn |
|---|---|
| Rok vydání: | 1982 |
| Předmět: |
Radiological and Ultrasound Technology
medicine.diagnostic_test Plane (geometry) business.industry Computer science Movement Boundary (topology) Motion (geometry) Computed tomography Imaging phantom Models Structural medicine Humans Radiology Nuclear Medicine and imaging Computer vision Artificial intelligence Tomography X-Ray Computed business |
| Zdroj: | Physics in Medicine and Biology. 27:51-61 |
| ISSN: | 1361-6560 0031-9155 |
| DOI: | 10.1088/0031-9155/27/1/005 |
| Popis: | In order to increase understanding of artefacts caused by patient motion in computed tomography, rigid translational and rotational motions in the plane of reconstruction have been considered. Motion artefacts were simulated on a digital computer and demonstrated in actual CT scans of a phantom. The types of motion artefacts observed included streaking, boundary splitting and subtle distortions of shape. A method for removing artefacts from a CT image without rescanning the patient is discussed, and some examples of possible improvement are shown using the simulation model. It is assumed that perfect knowledge of patient motion is known since this represents the theoretical limit on possible improvement to the degraded image. A qualitative discussion of streaking, the most common type of motion artefact, is also included. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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