小型焦点マルチビームX線源技術を用いた高解像度口腔内トモシンチグラフィ撮像

With the increasing demand for intraoral dental health assessment, it has become important to obtain more detailed and informative visual data. To obtain high-resolution dental imaging, this study conducts research on advanced X-ray imaging technologies. This study proposes adopting multi-beam X-ray source for achieving high-resolution 3D intraoral imaging. Key parameters such as focal spot size, detector pixel size, system magnification and line-pair resolution are systematically analyzed. A theoretical framework is established to derive the resolution formula for X-ray imaging, identifying key factors that affect imaging resolution. An experimental platform is constructed to conduct performance testing on the multi beam X-ray tube. The results show that X-ray tube is worked on an anode voltage of 70 kV and a current of 7 mA. The measured focal spot sizes ranged from 0.43 mm to 0.52 mm, with an average of 0.47 mm and a standard deviation of 0.028. Line-pair resolution tests confirmed that all focal spots achieved the target resolution of 16 lp/mm. Systematic analysis of the X-ray imaging system demonstrates that, by employing a multi-beam X-ray tube and a detector with 18.5 μm pixels and a frame rate of 20 fps under a magnification factor of 1.04, the system achieved high-resolution imaging with resolution of 31.3 μm (16 lp/mm) for each focal spot, enabling the acquisition of seven projection angles within 1 s. The experimental results conclusively validate the clinical potential of multi-beam X-ray source in detecting various dental pathologies, demonstrating its reliability and suitability for high-resolution intraoral imaging applications.