Estimating the Center of Rotation of Tomographic Imaging Systems with Limited Projections

Huanyi Zhou, Stanley J. Reeves & Peter R. Panizzi
For a tomographic imaging system, image reconstruction quality is highly correlated with accurate determination of the true center of rotation (COR) location. A significant center offset error will introduce ringing, streaking, or other artifacts into the reconstruction, while smaller COR error will cause blurring of the image. Well known COR correction techniques including image registration, center of mass calculation, or reconstruction evaluation work well under certain conditions. However, some conditions, e.g. parallel projections or no...
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