Sindbad : from Cad Model to Synthetic Radiographs
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چکیده
منابع مشابه
Recent Improvements for Scatter Simulation in Sindbad, a Coupled Photon Monte Carlo and Cad Software
In an X-ray radiography, scattering of photons from the inspected object, as well as backscattering or scattering from the environment, may have significant deleterious effects on image quality, reducing the relative contrast of the flaw indication. Therefore, development of computational models simulating scattering in radiographic studies is of primary interest, to correctly evaluate flaw det...
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The computer simulation of realistic radiographs has been proved to be an efficient tool for the design of X-ray systems, the specification of their components, the development of dedicated image processing methods and the final validation. Sindbad software has been developed at LDET laboratory for that purpose. The goal of this paper is to describe new developments of Sindbad allowing taking i...
متن کاملCoupling Photon Monte Carlo Simulation and CAD Software. Application to X-ray Nondestructive Evaluation
A Monte Carlo radiation transport simulation program, EGS Nova, and a Computer Aided Design software, BRL-CAD, have been coupled within the framework of Sindbad, a Nondestructive Evaluation (NDE) simulation system. In its current status, the program is very valuable in a NDE laboratory context, as it helps simulate the images due to the uncollided and scattered photon fluxes in a single NDE sof...
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OBJECTIVE To evaluate the effect of computer-aided detection (CAD) system on observer performance in the detection of malignant lung nodules on chest radiograph. MATERIALS AND METHODS Two hundred chest radiographs (100 normal and 100 abnormal with malignant solitary lung nodules) were evaluated. With CT and histological confirmation serving as a reference, the mean nodule size was 15.4 mm (ra...
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Skeletal maturity is assessed visually by comparing hand radiographs to a standardized reference image atlas. Most common are the methods by Greulich & Pyle and Tanner & Whitehouse. For computer-aided diagnosis (CAD), local image regions of interest (ROI) such as the epiphysis or the carpal areas are extracted and evaluated. Heuristic approaches trying to automatically extract, measure and clas...
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