So people have paid many attentions to the research of energy spectrum hardening and the photon scattering 因而關于射線的能譜硬化和散射研究工作,成為人們廣泛關注的課題。
( b ) that designing a program to correct the energy spectrum hardening during reconstructing image is feasible . ( 2 ) the question of photon scattering ( b )利用本論文所推導出的能譜硬化修正公式,在圖像重建時編制一個程序進行能譜硬化修正是切實可行的。
In the focal plane of z = 0 , the smaller the dss of the fhb , the higher the optical potential , and the greater the corresponding optimal detuning 8 , which are beneficial to atomic lens because it cannot only be profitable to obtain an atomic lens with a higher resolution , but also helpful to reduce the spontaneous emission and photon scattering effects of atoms in the fhb 在焦平面上,聚焦中空光束的dss越小,光學勢越大,相應的最佳失諧量越大,這對原子透鏡的性能越有利。因為這不僅容易得到高分辨率的原子透鏡,而且還可以減少在聚焦中空光束中原子的自發(fā)輻射和光子散射效應。
How improving the capability of ict has become more and more an important task , for example , improving spatial resolution and density resolution , reducing scan time , enlarging the size of measure space , improving image quality , etc . moreover the question of the energy spectrum hardening and the photon scattering is one of important bottleneck to restrict the improvement of ict 如何提高工業(yè)ct的性能指標,如怎樣進一步提高空間分辨率、密度分辨率,減少掃描時間,增大可測工件尺寸,改善圖像質(zhì)量等等成為了ct界面臨的重要任務。而其中射線的能譜硬化和散射問題,又是制約工業(yè)ct各項性能指標提高的重要瓶頸之一。
Reference to the convention means of the analysis and research for energy spectrum hardening and photon scattering in internal and external , and based on the physical mechanism of radial interacts with matter , this paper approximatively deduce a theoretical formula of correction of energy spectrum hardening and scattered radiation in transmission industrial x - ray computerized tomography from a ideal model . and presented a correction computer program 本文在分析研究國內(nèi)外有關射線能譜硬化和散射修正問題的分析方法及其研究狀況的基礎上,從射線同物質(zhì)相互作用的物理學機理出發(fā),從理論上近似推導了x射線能譜硬化和散射修正計算公式,建立了散射修正的分析模型,并編制了相應的計算機修正程序。