کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1831309 | 1526499 | 2007 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Two approaches to implementing projector–backprojector pairs for 3D reconstruction from Compton scattered data Two approaches to implementing projector–backprojector pairs for 3D reconstruction from Compton scattered data](/preview/png/1831309.png)
Iterative image reconstruction for the Compton camera is computationally challenging since the projection and backprojection operations are performed on conical surfaces rather than along straight lines and there are many possible combinations of positions and energy measurements. Here, we note that implementing a computationally efficient projector–backprojector pair with good accuracy is an important factor to be considered in image reconstruction. In this study, two different approaches to conical surface integration were investigated for rapid calculations of projection and backprojection in 3D reconstruction; the ellipse-stacking method (ESM) and the ray-tracing method (RTM). Our experimental results indicated that while both methods produced equivalent reconstruction accuracies, RTM performed better than ESM in both computation time per iteration and total number of iterations for convergence.
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 571, Issues 1–2, 1 February 2007, Pages 255–258