An 8×8 Row-Column Summing Readout Electronics for Preclinical Positron Emission Tomography Scanners.
This work presents a row/column summing readout electronics for an 8×8 silicon photomultiplier array. The summation circuit greatly reduces the number of electronic channels, which is desirable for pursuing higher resolution positron emission tomography scanners. By using a degenerated common source topology in the summation circuit, more fan-in is possible and therefore a greater reduction in the number of electronic channels can be achieved. The timing signal is retrieved from a common anode, which allows the use of a single fast-sampling analog to digital converter (ADC) for the timing channel and slower, lower power ADCs for the 64 spatial channels. Preliminary results of one row summation of the 8×8 readout electronics exhibited FWHM energy resolution of 17.8% and 18.3% with and without multiplexing, respectively. The measured timing resolution is 2.9ns FWHM.
Shih
Y C
YC
Department of Electrical Engineering, University of Washington, Seattle, WA 98115 USA.
Sun
F W
FW
Macdonald
L R
LR
Otis
B P
BP
Miyaoka
R S
RS
McDougald
W
W
Lewellen
T K
TK