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This paper presents an efficient technique to evaluate the scattering in the near field zone, based on the Dirichlet-to-Neumann map. Such a map allow to truncate the computational domain from an infinite one to a finite one. Specifically, it introduces an exact boundary condition on the truncated computational domain rather then an approximate one as it happens when using classical absorbing boundary...
Knowledge of the Depth-Of-Interaction (DOI) in detector is crucial for small ring diameter PET scanner but it is also very important for single photon emission imaging, in particular for applications where very high spatial resolution is required and position distortions caused by slant collimators can strongly affect the final response of the 3D reconstructed image. In addition the DOI determination...
This paper presents a new MAC protocol with QoS support for wireless ad-hoc networks. This protocol called QoS- CROMA is an extension of an interesting TDMA MAC protocol that makes use of a receiver-driven on-demand time-slot assignment policy. Our QoS extension concerns the receiver-side scheduling, sender-side slot selection policy and the protocol packet format modification. A real-time scheduler...
Silicon Photo-Multiplier (SiPM) detectors represent an attractive solution for the detection of low energy photons in several fields of both high energy physics and medical imaging. We present here an accurate electrical model for this kind of detectors, which can be conveniently used to perform reliable simulations at circuit level. A suitable extraction procedure for the parameters involved in the...
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