Monte Carlo simulation of a cone-beam CT system for lightweight casts

Cone-beam computed tomography(CBCT),a modern technique with many applications,is becoming increasingly important and essential in many areas of economics and life.CBCT equipment has been commercialized in both hardware and software.However,having a device system suitable for a specific group of objects will be the best.This work used Monte Carlo simulation to optimize the design of a Cone-beam Computed Tomography(CBCT)for lightweight and small-size casts.Factors affecting image quality such as radiation-source,flat-panel detector,and geometrical distance were investigated.Simulation results indicate that an X-ray generator with a focal spot size of 4×4µm^(2),high voltage of 240 kV,and a radiation intensity of 10^(13) photon/s with a flat panel CsI(Tl)detector of 0.3 mm thickness and a pixel size of 0.1–0.2 mm,is suitable for a CBCT to inspect small objects in industry.The Monte Carlo model was validated against experiments and to evaluate some characteristics of the existing system.