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20 March 2007 Evaluation of the channelized Hotelling observer for signal detection in 2D tomographic imaging
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Abstract
Signal detection by the channelized Hotelling (ch-Hotelling) observer is studied for tomographic application by employing a small, tractable 2D model of a computed tomography (CT) system. The primary goal of this manuscript is to develop a practical method for evaluating the ch-Hotelling observer that can generalize to larger 3D cone-beam CT systems. The use of the ch-Hotelling observer for evaluating tomographic image reconstruction algorithms is also demonstrated. For a realistic model for CT, the ch-Hotelling observer can be a good approximation to the ideal observer. The ch-Hotelling observer is applied to both the projection data and the reconstructed images. The difference in signal-to-noise ratio for signal detection in both of these domains provides a metric for evaluating the image reconstruction algorithm.
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Samuel J. LaRoque, Emil Y. Sidky, Darrin C. Edwards, and Xiaochuan Pan "Evaluation of the channelized Hotelling observer for signal detection in 2D tomographic imaging", Proc. SPIE 6515, Medical Imaging 2007: Image Perception, Observer Performance, and Technology Assessment, 651514 (20 March 2007); doi: 10.1117/12.710112; https://doi.org/10.1117/12.710112
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