Windmill artifact in multi-slice helical CT

Michael Silver; Katsuyuki Taguchi; Ilmar Hein; Be Shan Chiang; Masahiro Kazama; Issei Mori

doi:10.1117/12.483585

Windmill artifact in multi-slice helical CT

Michael Silver, Katsuyuki Taguchi, Ilmar Hein, Be Shan Chiang, Masahiro Kazama, Issei Mori

Research output: Contribution to journal › Conference article › peer-review

23 Scopus citations

Abstract

Multi-slice helical CT-systems suffer from windmill artifacts: black/white patterns that spin off of features with high longitudinal gradients. The number of black/white pairs matches the number of slices (detector rows) in the multi-slice detector. The period of the spin is the same as the helical pitch. We investigate the cause of the pattern by following the traces of selected voxels through the multi-slice detector array as a function of view position. This forms an "extracted sinogram" which represents the data used to reconstruct that specific voxel. Now we can determine the cause of the artifact by correlating the windmill streak in the image with the extracted data. The investigation shows that inadequate sampling along the longitudinal direction causes the artifact.

Original language	English (US)
Pages (from-to)	1918-1927
Number of pages	10
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	5032 III
DOIs	https://doi.org/10.1117/12.483585
State	Published - Sep 15 2003
Externally published	Yes
Event	Medical Imaging 2003: Image Processing - San Diego, CA, United States Duration: Feb 17 2003 → Feb 20 2003

Keywords

Artifacts
Helical CT
Multi-slice CT

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

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10.1117/12.483585

Cite this

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title = "Windmill artifact in multi-slice helical CT",

abstract = "Multi-slice helical CT-systems suffer from windmill artifacts: black/white patterns that spin off of features with high longitudinal gradients. The number of black/white pairs matches the number of slices (detector rows) in the multi-slice detector. The period of the spin is the same as the helical pitch. We investigate the cause of the pattern by following the traces of selected voxels through the multi-slice detector array as a function of view position. This forms an {"}extracted sinogram{"} which represents the data used to reconstruct that specific voxel. Now we can determine the cause of the artifact by correlating the windmill streak in the image with the extracted data. The investigation shows that inadequate sampling along the longitudinal direction causes the artifact.",

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T1 - Windmill artifact in multi-slice helical CT

AU - Silver, Michael

AU - Taguchi, Katsuyuki

AU - Hein, Ilmar

AU - Chiang, Be Shan

AU - Kazama, Masahiro

AU - Mori, Issei

PY - 2003/9/15

Y1 - 2003/9/15

N2 - Multi-slice helical CT-systems suffer from windmill artifacts: black/white patterns that spin off of features with high longitudinal gradients. The number of black/white pairs matches the number of slices (detector rows) in the multi-slice detector. The period of the spin is the same as the helical pitch. We investigate the cause of the pattern by following the traces of selected voxels through the multi-slice detector array as a function of view position. This forms an "extracted sinogram" which represents the data used to reconstruct that specific voxel. Now we can determine the cause of the artifact by correlating the windmill streak in the image with the extracted data. The investigation shows that inadequate sampling along the longitudinal direction causes the artifact.

AB - Multi-slice helical CT-systems suffer from windmill artifacts: black/white patterns that spin off of features with high longitudinal gradients. The number of black/white pairs matches the number of slices (detector rows) in the multi-slice detector. The period of the spin is the same as the helical pitch. We investigate the cause of the pattern by following the traces of selected voxels through the multi-slice detector array as a function of view position. This forms an "extracted sinogram" which represents the data used to reconstruct that specific voxel. Now we can determine the cause of the artifact by correlating the windmill streak in the image with the extracted data. The investigation shows that inadequate sampling along the longitudinal direction causes the artifact.

KW - Artifacts

KW - Helical CT

KW - Multi-slice CT

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Windmill artifact in multi-slice helical CT

Abstract

Keywords

ASJC Scopus subject areas

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