Title :
High-resolution imaging using a 48×48 Ge array with multiplexer readout
Author :
Barber, H.B. ; Augustine, F.L. ; Barrett, H.H. ; Dereniak, E.L. ; Eskin, J.D. ; Marks, D.G. ; Matherson, K.J. ; Venzon, J.E. ; Woolfenden, J.M. ; Young, E.T.
Author_Institution :
Div. of Nucl. Med., Arizona Univ., Tucson, AZ, USA
Abstract :
We are developing an imaging technique for nuclear medicine that makes use of semiconductor arrays having a large number of separate pixels on a single slab that are read out by a monolithic integrated circuit called a multiplexer. The device is similar to a focal-plane array used for infrared imaging. Here we present results verifying the concept by using a Hughes 48×48 Ge PIN focal-plane array as a gamma-ray imaging system. The performance of this device as an imaging spectrometer was extraordinary, with a spatial resolution of 125 μm at 30 keV and an energy resolution of 2 keV FWHM (25-140 keV). The device performed well over a temperature range of 136-200 K. It is concluded that semiconductor detector arrays with multiplexer readout are a very attractive approach for a new generation of nuclear medicine imaging systems
Keywords :
biomedical imaging; gamma-ray detection; gamma-ray spectrometers; germanium radiation detectors; 136 to 200 K; 25 to 140 keV; 48×48 Ge array; Ge; Hughes 48×48 Ge PIN focal-plane array; focal-plane array; gamma-ray imaging system; high-resolution imaging; monolithic integrated circuit; multiplexer readout; nuclear medicine imaging systems; semiconductor arrays; High-resolution imaging; Infrared imaging; Monolithic integrated circuits; Multiplexing; Nuclear imaging; Nuclear medicine; Optical imaging; Pixel; Slabs; Spectroscopy;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference Record, 1995., 1995 IEEE
Print_ISBN :
0-7803-3180-X
DOI :
10.1109/NSSMIC.1995.504189
