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The phantom study showed a high sensitivity of this method that allowed the visualisation of even very small structures in the size range of a few detector pixels, i.e. in the shown configuration, a few hundred microns.
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Let's rediscover Flaubert, Stendhal, Celine, just to mention a few detectors of fraudulence.
This is a nice robustness feature, but very few detectors provide this advantage.
In addition, for only a few detectors, the statistical properties have been studied and established, referred to as the optimal detectors.
In order to test our concept, we developed the software and implemented a number of learning models well known in the literature and developed a few detectors.
In fact, unlike previous approaches which employ hundreds of outputs (one for each fuel assembly), only two ANN outputs are employed representing the X- and Y-coordinates (location) of instability; (5) the responses of only a few detectors are employed; (6) a measure of confidence in the prediction is assigned.
Considering the geometry of the breast and limitations of optical modalities, reconstruction algorithms are required to handle severely limited data sets, where very few detectors are used for each source location.
Multi-pinhole designs for SPECT applications range from systems with a few detectors using collimators with a large number of pinholes, which do not reduce the counting rate substantially and allow for high time resolution, to systems with several detectors using collimators with only a few pinholes, or alternatively, annular detectors, with emphasis on improvement of the spatial resolution.
The reconstruction results based on few-detector data from the three experimental cases are shown in Figs. 1, 2 and 3, respectively.
In this work, we present a total-variation-minimization (TVM) enhanced iterative reconstruction algorithm that can provide excellent photoacoustic image reconstruction from few-detector and limited-angle data.
Here we describe an unconstrained TVM FEM-based iterative reconstruction algorithm, and for the first time present experimental evidence that the TVM-based algorithm offers excellent photoacoustic image reconstruction from few-detector and limited-angle data.
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