Comput Methods Programs Biomed - Comparison of algorithms for out-of-plane artifacts removal in digital tomosynthesis reconstructions.

Tópicos

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Resumo

Digital tomosynthesis is a method of limited angle reconstruction of tomographic images produced at variable heights, on the basis of a set of angular projections taken in an arc around human anatomy. Reconstructed tomograms from unprocessed original projection images, however, are invariably affected by tomographic noise such as blurred images of objects lying outside the plane of interest and superimposed on the focused image of the fulcrum plane. The present work investigates the performance of two approaches for generation of tomograms with a reduced noise: a generalised post-processing method, based on constructing a noise mask from all planes in the reconstructed volume, and its subsequent subtraction from the in-focus plane and a filtered Multiple Projection Algorithm. The comparison between the two algorithms shows that the first method provides reconstructions with very good quality in case of high contrast features, especially for those embedded into a heterogeneous background.

Resumo Limpo

digit tomosynthesi method limit angl reconstruct tomograph imag produc variabl height basi set angular project taken arc around human anatomi reconstruct tomogram unprocess origin project imag howev invari affect tomograph nois blur imag object lie outsid plane interest superimpos focus imag fulcrum plane present work investig perform two approach generat tomogram reduc nois generalis postprocess method base construct nois mask plane reconstruct volum subsequ subtract infocus plane filter multipl project algorithm comparison two algorithm show first method provid reconstruct good qualiti case high contrast featur especi embed heterogen background

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