Simulation and experimental study of cone artifact in spiral CT / 南方医科大学学报
Journal of Southern Medical University
;
(12): 1616-1618, 2006.
Article
in Chinese
| WPRIM
| ID: wpr-232823
ABSTRACT
<p><b>OBJECTIVE</b>To study regular patterns of cone artifact resulted from interpolation algorithm of spiral CT.</p><p><b>METHODS</b>Based on the principle of interpolation algorithm and back-projection reconstruction, a mathematical model of the reconstructed image was established to clarify the relation of the scanning parameters and the characteristics of the scanned object with the cone artifact. Experiments were carried out by a set of acrylic phantoms on siemens plus 4 CT scanners.</p><p><b>RESULTS</b>The artifact in the image was directly proportional to the table increment per gantry rotation of the scanner, and was positively correlated to the tangent of half cone-angle and inversely to the radii in the reconstruction plane of the phantom. The theoretical analysis was validated by experimental results.</p><p><b>CONCLUSION</b>The cone artifact is related to the scanning parameters and the characteristics of the scanned object.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Reference Standards
/
Algorithms
/
Computer Simulation
/
Image Processing, Computer-Assisted
/
Artifacts
/
Phantoms, Imaging
/
Tomography, Spiral Computed
/
Methods
/
Models, Theoretical
Type of study:
Prognostic study
Language:
Chinese
Journal:
Journal of Southern Medical University
Year:
2006
Type:
Article
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