Korean J Med Phys.
2008 Sep;19(3):186-190.
Cone-beam Reconstruction using Limited EPID Projections for Seeds Localization
- Affiliations
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- 1Department of Biomedical Engineering, The Catholic University of Korea, Seoul, Korea. suhsanta@catholic.ac.kr
- 2Department of Radiation Oncology, Asan Medical Center, University of Ulsan, Seoul, Korea.
- 3Department of Radiation Oncology, Halym University Sacred Heart Hospital, Seoul, Korea.
Abstract
- In this study, we describe the preliminary application for the delineation of a metal object using cone-beam reconstruction (CBR) based on limited electronic portal imaging device (EPID) projections. A typical Feldkamp, Davis and Kress (FDK) reconstruction algorithm accompanying the edge preserving smoothing filter was used as only a few projections are acquired for reconstruction. In a correlation study of the projection numbers, we found that the size of the seeds and their location depicted by these CBR images were almost identical. Limited views were used for CBR, and our method is inexpensive and competitive for use in clinical applications.
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