Fig. 1. 3D dose measurement device based on scintillator

Fig. 2. Coordinate system conversion in pinhole imaging model

Fig. 3. Schematic diagram of calculation method and partial display of system response matrix

Fig. 4. Variation of predicted time consumption and RMSE with n

Fig. 5. Simulation results of uniformly luminous objects

Fig. 6. Grayscale histogram distribution in red box area for two simulation results

Fig. 7. Schematic diagram of columnar luminous objects

Fig. 8. Simulation results of non-uniformly luminous objects

Fig. 9. Total gradient distribution in red box area for two simulation results

Fig. 10. Total gradient histogram distribution in red box area for two simulation results

Fig. 11. Analysis of error sources of calculation method based on projection area