Comparison of the X-ray tube spectrum measurement using BGO, NaI, LYSO, and HPGe detectors in a preclinical mini-CT scanner: Monte Carlo simulation and practical experiment

In diagnostic X-ray computed tomography (CT) imaging, some applications, such as dose measurement using the Monte Carlo method and material decomposition dual/multi-energy approaches, rely on accurate knowledge of energy spectrum beam. this regard, detectors providing an estimation could greatly impact quality CT imaging patient-specific dosimetry. The aim study is to estimate intrinsic efficiency resolution different types solid-state gamma-ray in order generate a precise dual-energy beam from conventional x-ray tube external filters. clinical was experimentally measured high purity Germanium detector (HPGe) obtained validated by (MC) simulations. experiment employed assess detection inorganic scintillators semiconductor-based detectors, namely HPGe, BGO, NaI, LYSO, MC best performing create measure through applying attenuating filters original simulation results indicated 9.16% for HPGe wherein full width-at-half-maximum (FWHM) about 1/3rd other detectors. spectra estimated various source energies exhibited good agreement between experimental with maximum difference 6%. Owing high-energy discrimination power detector, created 0.5 4.5 mm Aluminum filters, which involves 70 140 keV peaks 8% overlap. measurements simulations close spectrum. Given generated minimal overlap