Title :
CMOS detector readout electronics for an emission-transmission medical imaging system
Author :
Heanue, J.A. ; Boser, B.E. ; Hasegawa, B.H.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA, USA
fDate :
8/1/1995 12:00:00 AM
Abstract :
We have built a prototype medical imaging system in which transmission X-ray data provide anatomical information while emission radionuclide data yield physiological information. We have developed a CMOS integrated circuit for readout of the system´s high-purity germanium detector. The circuit can be operated in three different modes. The first is a slow pulse-counting mode for detection of radionuclide events at 104 cps with 1-2 keV energy resolution. Next, there is a fast pulse-counting mode for simultaneous acquisition of emission and transmission data or for acquisition of dual-energy X-ray data at 106 cps with 5-7 keV energy resolution. Finally, current mode operation allows fast acquisition of X-ray transmission data. The circuit architecture includes a common preamplifier, selectable pulse shaping stages, and a common output buffer
Keywords :
CMOS integrated circuits; counting circuits; data acquisition; emission tomography; germanium radiation detectors; nuclear electronics; preamplifiers; pulse shaping circuits; single photon emission computed tomography; CMOS detector readout electronics; CMOS integrated circuit; Ge; HPGe detector; SPECT; X-ray computed tomography; anatomical information; common preamplifier; current mode operation; dual-energy X-ray data; emission radionuclide data; emission-transmission computed tomography; emission-transmission medical imaging system; fast pulse-counting mode; high-purity Ge detector; physiological information; prototype medical imaging system; selectable pulse shaping stages; simultaneous acquisition; single photon emission computed tomography; slow pulse-counting mode; transmission X-ray data; transmission data; Biomedical imaging; CMOS integrated circuits; Detectors; Energy resolution; Event detection; Germanium; Integrated circuit yield; Prototypes; Readout electronics; X-ray imaging;
Journal_Title :
Nuclear Science, IEEE Transactions on
