Positron emission mammography using Pr:LuAG scintillator – Fusion of optical material study and systems engineering

详细信息    查看全文

• 作者：Akira Yoshikawa ; Takayuki Yanagida ; Kei Kamada ; Yuui Yokota ; Jan Pejchal ; Akihiro Yamaji ; Yoshiyuki Usuki ; Seiichi Yamamoto ; Masayasu Miyake ; Kazuaki Kumagai ; Katsuhisa Sasaki ; T.R. dos Santos ; Mamoru
• 关键词：Pr ; LuAG ; PET ; PEM ; Scintillator ; Gamma camera
• 刊名：Optical Materials
• 出版年：2010
• 出版时间：August 2010
• 年：2010
• 卷：32
• 期：10
• 页码：1294-1297
• 全文大小：537 K

文摘

The breast cancer is one of the most frequent cause of death among female cancer patients. However, when discovered at the early stage, the probability of recovery is very high. Therefore, the development of positron emission mammography (PEM) to detect the breast cancer at the early stage with high efficiency is demanding. As the diameter of the scanner part is small, a scintillator with faster response is required. As the recently developed Pr:LuAG has almost twice as short scintillation decay time than that of Ce:LSO, the Pr:LuAG scintillator was employed in our recently developed PEM system. One camera unit consisted of 20 × 64 scintillator pixels optically coupled with three H8500-03 multi anode photomultipliers. The Pr:LuAG pixel size is 2.1 × 2.1 × 15 mm³ and the BaSO₄ was used as a reflector. Four planar cameras are placed at both sides. Therefore, eight cameras were installed at both sides of the instrument. The spatial resolution was evaluated to be 1.1 mm using the ²²Na point source. Fluorodeoxyglucose with ¹⁸F hotspot image was also detected using the breast phantom.