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논문 기본 정보

자료유형
학술저널
저자정보
Kwangdon Kim (Korea University) Seungbin Bae (Korea University) Kisung Lee (Korea University) Yonghyun Chung (Yonsei University) Sujung An (Yonsei University) Jinhun Joung (Korea University)
저널정보
대한전자공학회 IEIE Transactions on Smart Processing & Computing IEIE Transactions on Smart Processing & Computing Vol.4 No.6
발행연도
2015.12
수록면
384 - 390 (7page)

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초록· 키워드

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There are two main artifacts in reconstructed images from in-beam positron emission tomography (PET). Unlike generic PET, in-beam PET uses the annihilation photons that occur during heavy ion therapy. Therefore, the geometry of in-beam PET is not a full ring, but a partial ring that has one or two openings around the rings in order for the hadrons to arrive at the tumor without prevention of detector blocks. This causes truncation in the projection data due to an absence of detector modules in the openings. The other is a ring artifact caused by the gaps between detector modules also found in generic PET. To sum up, in-beam PET has two kinds of gap: openings for hadrons, and gaps between the modules. We acquired three types of simulation results from a PET system: full-ring, C-ring and dual head. In this study, we aim to compensate for the artifacts that come from the two types of gap. In the case of truncation, we propose a method that uses prior knowledge of the location where annihilations occur, and we applied the discrete-cosine transform (DCT) gap-filling method proposed by Tuna et al. for inter-detector gap.

목차

Abstract
1. Introduction
2. Materials and Methods
3. Results
4. Discussion and Conclusion
References

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UCI(KEPA) : I410-ECN-0101-2016-569-002214816