Fig. 1. Sketch of imaging principle of a Compton camera.康普顿相机成像原理示意图

Fig. 2. Simulated distribution of the uncertainty of Compton scattering angle caused by the resolving power of Compton camera. The value of is from 0.3% to 5%. The initial -ray energy is 600 keV. 康普顿相机的能量分辨本领引起的康普顿散射角不确定度 分布的模拟结果, 相对能量分辨 取值从0.3%至5%, 初始 射线能量为600 keV

Fig. 3. Simulated distribution of . The relative energy resolution is fitted to 1.0%, the initial -ray energy is 100 and 1000 keV, respectively. 康普顿散射角不确定度 分布的模拟结果, 相对能量分辨为1.0%, 初始 射线能量分别为100 和1000 keV

Fig. 4. Simulated distribution of the uncertainty of Compton scattering angle caused by the position resolving power of Compton camera. The value of is from 0.5 mm to 3.0 mm. The initial -ray energy is 600 keV. 康普顿相机的位置分辨本领引起的康普顿散射角不确定度 分布的模拟结果, 位置分辨 取值范围为0.5—3.0 mm. 初始 射线能量为600 keV

Fig. 5. Simulated distribution of . The initial ray energy is 600 keV. The material of scattering detector is C and Si, respectively. 康普顿散射角不确定度 分布的模拟结果, 初始 射线能量为600 keV, 散射材料分别为C和Si

Fig. 6. Image of point-like gamma source reconstructed by back-projection algorithm as relative energy resolution of scatter detector is 1.0%.当散射探测器的相对能量分辨为1.0%时, 对 点源的反投影重建图像

Fig. 7. Image of point-like gamma source reconstructed by back-projection algorithm as position resolution of scatter detector is 2.0 mm.当散射探测器的位置分辨为2.0 mm时, 对 点源的反投影重建图像

Fig. 8. FWHM for image reconstructed by back-projection algorithm vs. (a) relative energy and (b) position resolution of scatter detector. 反投影法重建图像的FWHM随散射探测器分辨本领的变化　(a) 随相对能量分辨; (b) 随位置分辨

Fig. 9. Image of point-like gamma source reconstructed by back-projection algorithm only including the Doppler effect of electrons bounded in scatter material.只包含散射材料(Si晶体)的多普勒效应时, 对 点源的反投影重建图像