지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국산업응용수학회 JOURNAL OF THE KOREAN SOCIETY FOR INDUSTRIAL AND APPLIED MATHEMATICS Journal of the Korean Society for Industrial and Applied Mathematics Vol.18 No.2
- 발행연도
- 2014.6
- 수록면
- 157 - 166 (10page)
이용수
초록· 키워드
오류제보하기
If there are metals located in the X-ray scanned object, a point outside the metals gas its range of projection angle at which projections passing through the point are disturbed by the metals. Roughly speaking, this implies that attenuation information at the point is missing in the blocked projection range. So conventional projection completion MAR algorithms to use the undisturbed projection data on the boundary of the metaltrace is less efficient in reconstructing the attenuation coefficient in detailed parts, in particular, near the metal region. In order to overcome this problem, we propose the algebraic correction technique (ACT) to utilize a prereconstructed interim image of the attenuation coefficient outside the metal region which is obtained by solving a linear system designed to reduce computational costs. The reconstructed interim image of the attenuation coefficient is used as prior information for MAR. Numerical simulations support that the proposed correction technique shows better performance than conventional inpainting techniques such as the total variation and the harmonic inpainting.
목차
ABSTRACT
1. INTRODUCTION
2. METHOD
3. RESULTS
4. CONCLUSION
REFERENCES
참고문헌 (25)
참고문헌 신청
1. [학술지(정기간행물)] - R.M. Lewitt / 1978 / Image reconstruction from projections: III: Projection completion methods (theory) / Optik 50 : 189 ~ 204
2. [학술지(정기간행물)] - M. Abdoli / 2010 / A virtual sinogram method to reduce dental metallic implant artefacts in computed tomography-based attenuation correction for PET / Nucl. Med. Commun. 31 : 22 ~ 31
3. [학술지(정기간행물)] - G.H. Glover / 1981 / An algorithm for the reduction of metal clip artifacts in CT reconstructions / Med Phys 8 : 799 ~ 807
4. [학술지(정기간행물)] - W.A. Kalender / 1987 / Reduction of CT artifacts caused by metallic implants / Radiology 164 : 576 ~ 577
5. [학술지(정기간행물)] - A. Mehranian / 2013 / X-ray CT Metal Artifact Reduction Using Wavelet Domain L0 Sparse Regularization / IEEE Transactions on Medical Imaging 32 : 1707 ~ 1722
2. [학술지(정기간행물)] - M. Abdoli / 2010 / A virtual sinogram method to reduce dental metallic implant artefacts in computed tomography-based attenuation correction for PET / Nucl. Med. Commun. 31 : 22 ~ 31
3. [학술지(정기간행물)] - G.H. Glover / 1981 / An algorithm for the reduction of metal clip artifacts in CT reconstructions / Med Phys 8 : 799 ~ 807
4. [학술지(정기간행물)] - W.A. Kalender / 1987 / Reduction of CT artifacts caused by metallic implants / Radiology 164 : 576 ~ 577
5. [학술지(정기간행물)] - A. Mehranian / 2013 / X-ray CT Metal Artifact Reduction Using Wavelet Domain L0 Sparse Regularization / IEEE Transactions on Medical Imaging 32 : 1707 ~ 1722
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