2016 Fiscal Year Annual Research Report
Zero-dark-counting Mcps-range X-ray detectors and their applications to high-image-quality preclinical energy-dispersive CT
Project/Area Number |
26461804
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Research Institution | Iwate Medical University |
Principal Investigator |
佐藤 英一 岩手医科大学, 教養教育センター, 教授 (90154038)
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Project Period (FY) |
2014-04-01 – 2017-03-31
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Keywords | X線CT / エネルギー弁別CT / CdTe / YAP(Ce)-MPPC / LSO-MPPC / 高カウントレート / デュアルエネルギーカウンター / クアッドエネルギーカウンター |
Outline of Annual Research Achievements |
本研究では,Mcps領域でX線フォトンをカウントしてエネルギー弁別可能なLSO-MPPC,YAP(Ce)-MPPC,LSO-PMT,YAP(Ce)-PMTなどのX線検出器に関する基礎研究を行い,カウントレートの増加とエネルギー分解能の向上をはかった。次いで,2つのエネルギー範囲を決定できるデュアルエネルギー(DE)フォトンカウンターを作製した。このカウンターは高速コンパレーター(COM),マイクロコンピューター(MC),周波数・電圧変換器(FVC)などからなり,COMを用いてスレッショルドエネルギーを設定し,MCを用いて選択されたエネルギー範囲のフォトンをカウントした。MCから発生する論理パルスはFVCで電圧に変換され,アナログ・デジタルコンバーター(ADC)を介してパソコンに入力され,断層像が再構成された。このDEカウンターを第1世代CTスキャナーに組み込み,ヨウ素(I)とガドリニウム(Gd)の造影剤が入ったファントムを撮影した。IとGdのKエッジエネルギーはそれぞれ33.2と50.2keVであることから,Kエッジよりもわずかに高いエネルギーのフォトンを選択することにより,KエッジCT撮影が行われた。 クアッドエネルギー(QE)カウンターは4対のCO,MC,FVCからなり,4つのエネルギー範囲を選択でき,このカウンターを用いてQE-CT撮影を行なった。撮影で用いたエネルギー範囲は20-33,33-50,50-65,65-100keVで,IとGdの造影剤を使ったKエッジ撮影が同時に行われた。 XCounter製の高速CdTeアレーを借用し,デュアルエネルギーCTに関する基礎実験を行った。アレーの空間分解能とフレーム速度はそれぞれ100μmと4kfpsゆえ,被写体の高速撮影には有用であった。また,I-KエッジCTにより,I原子を高コントラストで描出できた。
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Research Products
(22 results)
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[Journal Article] Investigation of dual-energy X-ray photon counting using a cadmium telluride detector with dual-energy selection electronics2017
Author(s)
Sato, E., Kosuge, Y., Yamanome, H., Mikata, A., Miura, T., Oda, Y., Ishii, T., Hagiwara, O., Matsukiyo, H., Watanabe, M., Kusachi, S.
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Journal Title
Rad. Phys. Chem.
Volume: 130
Pages: 385-390
Peer Reviewed / Acknowledgement Compliant
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[Journal Article] Measurement of X-ray-tube voltage using a 0.3-mm-thick copper filter2016
Author(s)
Sato, E., Oda, Y., Yamaguchi, S., Hagiwara, O., Matsukiyo, H., Enomoto, T., Watanabe, M., Kusachi, S.
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Journal Title
Ann. Rep. Iwate Med. Univ. Center Lib. Arts Sci.
Volume: 51
Pages: 1-5
Peer Reviewed / Acknowledgement Compliant
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[Journal Article] Measurement of the X-ray tube voltage using filtrated spectra2016
Author(s)
Sato, E., Oda, Y., Sagae, M., Yamaguchi, S., Sato, Y., Hagiwara, O., Matsukiyo, H., Enomoto, T., Watanabe, M., Kusachi, S.
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Journal Title
Ann. Rep. Iwate Med. Univ. Center Lib. Arts Sci.
Volume: 51
Pages: 7-10
Peer Reviewed / Acknowledgement Compliant
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[Journal Article] Spectral X-ray computed tomography scanner using a cadmium telluride detector2016
Author(s)
Sato, E., Oda, Y., Yamaguchi, S., Hagiwara, O., Matsukiyo, H., Watanabe, M., Kusachi, S.
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Journal Title
Proc. SPIE
Volume: 9969
Pages: 99690L-1-6
Acknowledgement Compliant
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[Journal Article] Investigation of a near-infrared-ray computed tomography scanner2016
Author(s)
Sato, E., Oda, Y., Yuichi, S., Yamaguchi, Ishii, T., S., Hagiwara, O., Matsukiyo, H., Watanabe, M., Kusachi, S.
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Journal Title
Proc. SPIE
Volume: 9969
Pages: 99690I-1-6
Acknowledgement Compliant
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[Journal Article] Dual-energy X-ray computed tomography scanner using an energy-selecting device and a cadmium telluride detector2016
Author(s)
Sato, E., Ito, H., Oda, Y., Hagiwara, O., Matsukiyo, H., Watanabe, M., Kusachi, S.
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Journal Title
Mech. Eng. J.
Volume: 3
Pages: 16-00308-1-7
Peer Reviewed / Acknowledgement Compliant
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[Journal Article] Cancerous-region enhancement utilizing gadolinium-oxide nanoparticles and 7.0-T magnetic resonance imaging2016
Author(s)
Sato, E., Hagiwara, O., Matsukiyo, H., Watanabe, M., Kusachi, S., Metoki, T., Sato, Y., Oda, Y., Sagae, M., Yamaguchi, S., Ehara, S.
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Journal Title
Med. Imag. Inform. Sci.
Volume: 33
Pages: 1-6
Peer Reviewed / Acknowledgement Compliant
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[Presentation] Dual-energy X-ray computed tomography scanner utilizing an LSO-multipixel photon detector2016
Author(s)
Sato, Y., Sato, E., Yamaguchi, S., Ehara, S., Hagiwara, O., Matsukiyo, H., Enomoto, T., Watanabe, M., Kusachi, S.
Organizer
22nd Int. Conf. on Medical Physics
Place of Presentation
Bangkok
Year and Date
2016-12-10
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[Presentation] Spectral X-ray computed tomography scanner using a cadmium telluride detector2016
Author(s)
Sato, E., Oda, Y., Ishii, T., Hagiwara, O., Matsukiyo, H., Enomoto, T., Watanabe, M., Kusachi, S.
Organizer
22nd Int. Conf. on Medical Physics
Place of Presentation
Bangkok
Year and Date
2016-12-10
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[Presentation] First-generation near-infrared-ray computed tomography scanner2016
Author(s)
Sato, E., Oda, Y., Sato, Y., Ishii, T., Hagiwara, O., Matsukiyo, H., Enomoto, T., Watanabe, M., Kusachi, S.
Organizer
22nd Int. Conf. on Medical Physics
Place of Presentation
Bangkok
Year and Date
2016-12-10
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[Presentation] High-speed dual-energy X-ray photon counting utilizing an LSO-multipixel photon detector2016
Author(s)
Enomoto, T., Sato, E., Oda, Y., Ishii, T., Hagiwara, O., Matsukiyo, H., Watanabe, M., Kusachi, S.
Organizer
31th Int. Congr. on High Speed Imaging and Photonics
Place of Presentation
Osaka
Year and Date
2016-11-07
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[Presentation] High-speed dual-energy X-ray photon counting using a micro-photomultiplier tube and a LYSO crystal2016
Author(s)
Sato, E., Oda, Y., Ishii, T., Hagiwara, O., Matsukiyo, H., Enomoto, T., Watanabe, M., Kusachi, S.
Organizer
31th Int. Congr. on High Speed Imaging and Photonics
Place of Presentation
Osaka
Year and Date
2016-11-07
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[Presentation] Quad-energy X-ray photon counting using a CdTe detector and its application to spectral computed tomography2016
Author(s)
Ishii, T., Sato, E., Oda, Y., Hagiwara, O., Matsukiyo, H., Enomoto, T., Watanabe, M., Kusachi, S.
Organizer
31th Int. Congr. on High Speed Imaging and Photonics
Place of Presentation
Osaka
Year and Date
2016-11-07
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[Presentation] High-speed triple-energy X-ray photon counting using a small photomultiplier tube and an LSO crystal2016
Author(s)
Hagiwara, O., Sato, E., Oda, Y., Matsukiyo, H., Enomoto, T., Watanabe, M., Kusachi, S.
Organizer
31th Int. Congr. on High Speed Imaging and Photonics
Place of Presentation
Osaka
Year and Date
2016-11-07
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[Presentation] Spectral X-ray computed tomography scanner using a cadmium telluride detector2016
Author(s)
Sato, E., Oda, Y., Yamaguchi, S., Hagiwara, O., Matsukiyo, H., Watanabe, M., Kusachi, S.
Organizer
SPIE Optics+Photonics
Place of Presentation
San Diego
Year and Date
2016-09-01
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[Presentation] Investigation of a near-infrared-ray computed tomography scanner2016
Author(s)
Sato, E., Oda, Y., Yuichi, S., Yamaguchi, S., Ishii, T., Hagiwara, O., Matsukiyo, H., Watanabe, M., Kusachi, S.
Organizer
SPIE Optics+Photonics
Place of Presentation
San Diego
Year and Date
2016-09-01
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