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99mTc thyroid imaging system using multiple imaging plates |
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| Authors: | Shigeki Ito Takuya Saze Eiji Ariga Shizuhiko Deji Masahiro Hirota Kunihide Nishizawa |
| Institution: | 1. Radioisotope Research Center, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan;2. Radioisotope Research Center, Tokushima University, Kuramoto-cho 3-18-15, Tokushima 770-8503, Japan;3. Diagnostic Imaging Center, Nagoya Daini Red Cross Hospital, 466-8650 Nagoya, Japan;4. Department of Radiological Technology, Kobe Co-Medical College, 654-0142 Kobe, Japan;5. Department of Nuclear Engineering and Management Graduate School of Engineering, University of Tokyo, 113-0032 Tokyo, Japan;6. Radioisotope Research Center, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan |
| Abstract: | A system for taking static thyroid 99mTc images was devised by using multiple imaging plates (IPs) and a low-energy high resolution collimator. System spatial resolution of the IP systems and the gamma camera was determined by referring to standards set by the National Electrical Manufacturers Association. Sensitivity was represented by using lower detection limits (LDLs). The sensitivity and resolution of IP systems using 16 IP probes connecting two collimators and 9 IPs were determined by using a 20 ml thyroid phantom, and compared with the sensitivity of gamma cameras. The sensitivity of the IP systems increased in proportion to the number of IPs. The sensitivity and resolution of a probe using 6 IPs and a high resolution collimator were equivalent to or superior to the gamma camera for taking static thyroid 99mTc images. IP systems can be applied clinically as mobile static nuclear imaging devices. The performance of IP systems should be thoroughly investigated for combinations of various collimators and the number of IPs in order to verify their efficacy for imaging all organs. |
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