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Accuracy improvement of Time delay correction method for PET-based tumor tracking
https://repo.qst.go.jp/records/71347
https://repo.qst.go.jp/records/71347515e5b7e-1877-42e1-bef8-df364d0a6234
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2013-11-14 | |||||
| タイトル | ||||||
| タイトル | Accuracy improvement of Time delay correction method for PET-based tumor tracking | |||||
| 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 |
Shinaji, Tetsuya
× Shinaji, Tetsuya× Tashima, Hideaki× Yoshida, Eiji× Yamaya, Taiga× Haneishi, Hideaki× 品地 哲弥× 田島 英朗× 吉田 英治× 山谷 泰賀× 羽石 秀昭 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The world's first open type PET, named OpenPET, is being developed at the National Institute Radiological Sciences. We are aiming to employ the OpenPET in radiotherapy and to track the respiratory motion of a tumor in the thoracoabdominal region of a patient. By using PET images, we expect that the tumor itself can be directly visualized without using radio-opaque markers. Our prototype OpenPET system can output reconstructed images at about 2 frames per second with about a 2 s delay; this delay is mainly due to the reconstruction calculation time. Therefore we presented a time delay correction method with belt type piezoelectric sensor for tumor tracking for the OpenPET with support vector regression method (SVR) in the last IEEE NSS-MIC meeting. In this paper, we improved accuracy of this method. In the modified method, we added body surface displacement velocity as a secondary independent variable of the regression line so that it represents hysteresis effect. In addition, to supplement SVR's prediction posterior probability, we introduced hidden Markov model (HMM). As the result, the mean tracking error became within 3 mm. | |||||
| 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 | The 2013 IEEE Nuclear Science Symposium and Medical Imaging Conference, and Room-Temperature Semiconductor X-Ray and Gamma-Ray Detectors workshop | |||||
| 発表年月日 | ||||||
| 日付 | 2013-11-02 | |||||
| 日付タイプ | Issued | |||||
