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Evaluation of image reconstruction methods for improving resolution in radial direction with PET
https://repo.qst.go.jp/records/67404
https://repo.qst.go.jp/records/67404902f4d29-f418-4f2c-86cf-eb7465fc4c7d
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2003-07-08 | |||||
| タイトル | ||||||
| タイトル | Evaluation of image reconstruction methods for improving resolution in radial direction with PET | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Yamakawa, Keisuke
× Yamakawa, Keisuke× Kitamura, Keishi× Uemura, Koji× Toyama, Hinako× Haneishi, Hideaki× Murayama, Hideo× Uchiyama, Akihiko× 山川 恵介× 北村 圭司× 上村 幸司× 外山 比南子× 羽石 秀昭× 村山 秀雄 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The in-plane resolution is known to decrease depending on the distance from the center in a PET image. Many methods to improve the spatial resolution have been proposed by many authors with hardware or software. The purpose of this work was to improve the in-plane resolution of PET images without complex calculation and special hardware. We have adopted the detector response function (DRF) changing in the width at the distance from the center to reconstruct PET images. We have evaluated our method for the computer simulated phantom images by a Monte Carlo simulation method. The image reconstruction was performed by means of the proposed two methods, in which OS-EM algorithm is modified with the estimated DRF. Method-1 is the OS-EM algorithm incorporating DRF into forward projection. Method-2 is the OS-EM algorithm incorporating DRF into forward and back projection. The DRF is estimated from projection data of eight point sources at different distance from the center. We have evaluated quantitatively our methods for point sources and the brain phantom generated by using a Monte Carlo simulation method. Applying our methods to the simulation studies for point sources and the brain phantom, the in-plane resolution at the point far from the center found to be improved without complex calculation and special hardware. |
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| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | BrainPET'03 | |||||
| 発表年月日 | ||||||
| 日付 | 2003-07-03 | |||||
| 日付タイプ | Issued | |||||
