| Presentation | 2006-11-13 Partial Volume Correction in PET with Projection Onto Convex Sets : The Comparison of Estimated Result Affected by Convex Sets Combination Shigeo CHIYODA, Mika NAGANAWA, Tatsuo TOGAWA, Yuichi KIMURA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Because the spatial resolution of PET is rather low, around 2 or 3[mm], partial volume effect isn't ignorable. And, it is known that Projection Onto Convex Sets algorithm (POCS) is useful for super resolution in image processing, thus POCS is expected to be effective for partial volume correction of brain PET images. POCS enables various image processing by combining basic POCS operations such as incorporation of nonnegativity as a projection onto a convex set in Hilbert space. However, there is ambiguity in the selection of POCS operations, and it influences the performance on POCS. In this study, the impact on partial volume correction is investigated by using three kinds of closed convex sets: outlier in residual, non-negative and energy constraint. As a result, the best performance was archived when all three operations were combined in the meaning of the stability in estimated pixel values, restoration of edges, and preservation of total count. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | PET / partial volume effect / projection onto convex sets |
| Paper # | MI2006-73 |
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| Conference Information | |
| Committee | MI |
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| Conference Date | 2006/11/6(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Medical Imaging (MI) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Partial Volume Correction in PET with Projection Onto Convex Sets : The Comparison of Estimated Result Affected by Convex Sets Combination |
| Sub Title (in English) | |
| Keyword(1) | PET |
| Keyword(2) | partial volume effect |
| Keyword(3) | projection onto convex sets |
| 1st Author's Name | Shigeo CHIYODA |
| 1st Author's Affiliation | Graduate School of Science and Engineering, Waseda University() |
| 2nd Author's Name | Mika NAGANAWA |
| 2nd Author's Affiliation | Japan Society for the Promotion of Science:Positron Medical Center, Tokyo Metropolitan Institute of Gerontology |
| 3rd Author's Name | Tatsuo TOGAWA |
| 3rd Author's Affiliation | Graduate School of Science and Engineering, Waseda University |
| 4th Author's Name | Yuichi KIMURA |
| 4th Author's Affiliation | Positron Medical Center, Tokyo Metropolitan Institute of Gerontology |
| Date | 2006-11-13 |
| Paper # | MI2006-73 |
| Volume (vol) | vol.106 |
| Number (no) | 343 |
| Page | pp.pp.- |
| #Pages | 5 |
| Date of Issue | |