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Obtaining flat x-ray images from round objects.

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  2007 ASAE Annual Meeting  076238.(doi:10.13031/2013.23000)
Authors:   Ron P Haff
Keywords:   X-ray imaging, attenuators, image quality

A technique to correct deficiencies in x-ray images of cylindrical or spherical objects that are a consequence of the geometry of the sample is derived, for both two-dimensional (2D) and linescan imaging. The methods described involve the use of attenuators specifically shaped to equalize the x-ray absorption across the width of the sample, thus correcting the variation in pixel intensity caused by varying sample thickness. In the case of linescan imaging, the attenuator thickness is varied as the sample passes through the plane of the x-rays, either by rotation or linear actuation. For the 2D case, the technique is demonstrated in x-ray images of an apple, an orange, and a lime. For linescan imaging, the correction is applied to a plastic cylinder simulating a container such as a can or a jar.

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