Comput. Biol. Med. - A biologically-based algorithm for companding computerized tomography (CT) images.

Tópicos

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Resumo

Computerized Tomography (CT) images are High Dynamic Range (HDR) images of the X-ray attenuation coefficients of the body's tissues. The inability to see abnormalities in tissues with marked differences in their X-ray attenuation coefficients, in a single CT window, poses a significant clinical problem in radiology. In order to provide proper contrast, which reveals all the required clinical details within each specifically imaged tissue, a single CT slice must be viewed by a radiologist four times: the first viewing focuses on the lung window; the second viewing focuses on the soft tissues window; the third viewing focuses on the liver window; and the fourth viewing focuses on the bone window. In order to enhance the ability to perform a complete diagnosis, while decreasing diagnostic time, we developed the BACCT (Biologically-based Algorithm for Companding CT images) method. Our algorithm compresses and expands (compands) the HDR CT image into a single, low dynamic range image. Before performing the companding procedure, unique processing is required which involves operations that enhance and stretch the image. The performance of our algorithm has been demonstrated on a large repertoire of CT body images. All the clinically required CT information is exposed in each CT slice in a single image. The algorithm compands the CT images in a fully automatic way. Collaborating radiologists have already tested the results of our algorithmic method, and reported that the images seem to provide all the necessary information. However, clinical tests for statistical reliability are still required.

Resumo Limpo

computer tomographi ct imag high dynam rang hdr imag xray attenu coeffici bodi tissu inabl see abnorm tissu mark differ xray attenu coeffici singl ct window pose signific clinic problem radiolog order provid proper contrast reveal requir clinic detail within specif imag tissu singl ct slice must view radiologist four time first view focus lung window second view focus soft tissu window third view focus liver window fourth view focus bone window order enhanc abil perform complet diagnosi decreas diagnost time develop bacct biologicallybas algorithm compand ct imag method algorithm compress expand compand hdr ct imag singl low dynam rang imag perform compand procedur uniqu process requir involv oper enhanc stretch imag perform algorithm demonstr larg repertoir ct bodi imag clinic requir ct inform expos ct slice singl imag algorithm compand ct imag fulli automat way collabor radiologist alreadi test result algorithm method report imag seem provid necessari inform howev clinic test statist reliabl still requir

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