X-ray Photon Counting Using 100 MHz Ready-Made Silicon P--Intrinsic--N X-ray Diode and Its Application to Energy-Dispersive Computed Tomography
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概要
- 論文の詳細を見る
X-ray photons are directly detected using a 100 MHz ready-made silicon P--intrinsic--N X-ray diode (Si-PIN-XD). The Si-PIN-XD is shielded using an aluminum case with a 25-μm-thick aluminum window and a BNC connector. The photocurrent from the Si-PIN-XD is amplified by charge sensitive and shaping amplifiers, and the event pulses are sent to a multichannel analyzer (MCA) to measure X-ray spectra. At a tube voltage of 90 kV, we observe K-series characteristic X-rays of tungsten. Photon-counting computed tomography (PC-CT) is accomplished by repeated linear scans and rotations of an object, and projection curves of the object are obtained by linear scanning at a tube current of 2.0 mA. The exposure time for obtaining a tomogram is 10 min with scan steps of 0.5 mm and rotation steps of 1.0°. At a tube voltage of 90 kV, the maximum count rate is 150 kcps. We carry out PC-CT using gadolinium media and confirm the energy-dispersive effect with changes in the lower level voltage of the event pulse using a comparator.
- 医用画像情報学会の論文
- 2013-07-25
著者
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Sato Shigehiro
Department Of Applied Chemistry And Biotechnology Faculty Of Engineering Niigata Institute Of Techno
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Enomoto Toshiyuki
The 3rd Department Of Surgery Toho University School Of Medicine
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Oda Yasuyuki
Department of Pathology and Oral Surgery, Nihon University School of Dentistry
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Ogawa Akira
Department Of Applied Chemistry Graduate School Of Engineering The University Of Tokyo
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Watanabe Manabu
The 3rd Department of Surgery, Toho University School of Medicine, 2-17-6 Ohashi, Meguro, Tokyo 153-8515, Japan
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OSAWA Akihiro
The 3rd Department of Surgery, Toho University School of Medicine
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Kodama Hajime
The 3rd Department of Surgery, Toho University School of Medicine, Meguro, Tokyo 153-8515, Japan
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Kusachi Shinya
The 3rd Department of Surgery, Toho University School of Medicine, Meguro, Tokyo 153-8515, Japan
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HAGIWARA Osahiko
The 3rd Department of Surgery, Toho University School of Medicine
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Matsukiyo Hiroshi
The 3rd Department of Surgery, Toho University School of Medicine, Meguro, Tokyo 153-8515, Japan
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MATSUKIYO Hiroshi
The 3rd Department of Surgery, Toho University School of Medicine
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Enomoto Toshiyuki
The 3rd Department of Surgery, Toho University School of Medicine, Meguro, Tokyo 153-8515, Japan
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Oda Yasuyuki
Department of Physics, Iwate Medical University, Yahaba, Iwate 028-3694, Japan
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Sato Eiichi
Department of Anatomic Pathology, Tokyo Medical University
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