Title :
A new gamma camera with a Gas Electron Multiplier
Author :
Koike, Takahisa ; Uno, Shoji ; Sekimoto, Michiko ; Murakami, Takeshi ; Shoji, Masayoshi ; Nagashima, Fukutarou ; Yamamoto, Kenji ; Nakano, Eiichi ; Uchida, Tomohisa
Author_Institution :
Int. Univ. of Health & Welfare, Otawara, Japan
Abstract :
We have developed a prototype gaseous gamma camera with a Gas Electron Multiplier (GEM) for biomolecular analysis and medical applications. The system consists of three devices: a detector, an Ethernet hub, and a PC. The detector consists of a GEM-chamber and integrated readout electronics. The GEM-chamber consists of three parts: the gamma-ray conversion and amplification layers consisting of GEM foils, and a readout component. To increase gamma-ray-detection efficiency, we constructed a new type of GEM foil. The gamma-ray conversion layers are plated with gold 3 μm thick on both surfaces. In order to test the performance of the prototype camera, several measurements were performed with a phantom filled with 99mTc(141 keV) as the radioactive source, and two-dimensional (2D) images were obtained using a pinhole collimator. The camera showed good capability to resolve objects of a few mm2.
Keywords :
ionisation chambers; nuclear electronics; radioactive sources; radioisotope imaging; readout electronics; Ethernet hub; GEM foils; GEM-chamber; biomolecular analysis; gamma-ray amplification layer; gamma-ray conversion layer; gamma-ray-detection efficiency; gas electron multiplier; integrated readout electronics; medical applications; nuclear medicine; phantom filled; pinhole collimator; prototype gaseous gamma camera; radioactive source; readout component; two-dimensional images; Image resolution;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2011 IEEE
Conference_Location :
Valencia
Print_ISBN :
978-1-4673-0118-3
DOI :
10.1109/NSSMIC.2011.6152543
