Comparison Between Two Monte Carlo Simulations of Angiographic Phantom Coupled to Silicon Strip Detector

Preliminary results of a dual energy angiography simulation using the Monte Carlo package GEANT 3.2113 are presented and compared to Monte Carlo MCNP‐4C results reported before. The simulation is based on an experimental set up consisting of a Plexiglas‐aluminium step wedge phantom with 4 cylindrical cavities filled with iodated contrast medium. The silicon 384 microstrip detector was set into edge‐on configuration (incoming X‐rays parallel to longitudinal axis of the strips) and the properties of the simulated detector just resemble the ones of the real detector. Monochromatic photon beams of 31.5keV and 35.5keV are used to take advantage of the discontinuous variation of the iodine photon absorption at the energy of the K‐shell, the key to dual energy subtraction imaging.