Image quality analysis for dual energy subtraction imaging with afemtosecond laser-based hard X-ray source

摘要

We present a study of image quality for dual energy subtractionnimaging using an iodinated contrast agent and a femtosecond laser-basednhard X-ray source. The INRS CPA laser (400 fs pulse focused on solidntargets in a 3 Μm spot at 4 × 1018 Wncm-2) was used to create a bright hard X-ray sourcen(conversion efficiency of 10-5 in the characteristicnK∝ line emission, 12 Μm X-ray source diameter). Anmodel of image quality has been developed and been benchmarked withnspecific experiments using specially made angiography phantoms