| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 10715737 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2011 | 6 Pages |
Abstract
For biomolecular analysis and nuclear medicine, we are developing a novel gamma camera based on a gaseous detector that uses gas electron multipliers (GEMs). To increase the gamma-ray-detection efficiency, we have constructed a novel GEM foil. The gamma-ray-conversion layers of the GEM foils are plated with 3 μm of gold on both surfaces. To evaluate the detection efficiency of the gamma-ray energy that corresponds to 99mTc, which is the target isotope for our gamma camera, the measurements were performed using 241Am and 57Co as gamma-ray sources. Our measured detection efficiency was 0.81% (241Am) and 0.75% (57Co) for the sources, which agreed well with a Monte Carlo simulation based on Geant4. In addition, we were able to increase the efficiency using multiple gold-plated GEM foils.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
Takahisa Koike, Shoji Uno, Tomohisa Uchida, Michiko Sekimoto, Takeshi Murakami, Koich Miyama, Masayoshi Shoji, Takuya Fujiwara, Eiichi Nakano, Junsei Chiba,