Abstract

Abstract Coplanar rotational laminography (CRL) is a special case of laminography which is a tomographic technique used to image cross-sectional views through solid objects. In the case of CRL the film and object rotate synchronously, while the radiation source remains stationary. The image formed on the exposed film is highly blurred. This blurring may be described as a convolution of the ideal image with a radially symmetric point spread function (PSF). To deblur the laminographic image (laminogram) one has to perform a deconvolution of this image based on a laminographic PSF. The deconvolution is an ill-posed problem and therefore special methods are required for its realization. One of the possible methods, regularizing Fourier filtration, was tried and its most successful version was selected. A simple technique for the choice of filter parameters is proposed, based on an image quality evaluation method which was derived. Several laminograms (both simulated and experimental) were successfully reconstructed by this method.

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