Author/Authors :
Amendolia، نويسنده , , S.R and Bisogni، نويسنده , , M.G. and Bottigli، نويسنده , , U. and Ceccopieri، نويسنده , , A. and Delogu، نويسنده , , P. and Dipasquale، نويسنده , , G. and Fantacci، نويسنده , , M.E. and Marchi، نويسنده , , A. and Marzulli، نويسنده , , V.M. and Oliva، نويسنده , , P. and Palmiero، نويسنده , , R. Del Rosso، نويسنده , , V. and Stefanini، نويسنده , , A. and Stumbo، نويسنده , , S.، نويسنده ,
Abstract :
We have tested the imaging properties of a system based on a GaAs matrix that performs the direct detection of photons in the range of radiographic interest. The detector is bump-bonded to a VLSI single photon counting electronics. The imaging properties of the system have been evaluated in terms of the presampling MTF and the DQE(ν), that allow an absolute characterization of imaging properties of digital systems. We have tested other radiographic imaging systems in standard clinical conditions, using the same functions and we have compared them with the GaAs matrix system.
Keywords :
MTF , DQE , Single photon counting , x-ray imaging
