Title :
Evaluation of cylindrical SPECT camera
Author :
Bousselham, A. ; Stenström, P. ; Bohm, C. ; Larsson, S. ; Sanchez-Crespo, A.
Author_Institution :
Dept. of Phys., Stockholm Univ., Sweden
Abstract :
A cylindrical SPECT camera with a rotating collimator is being evaluated. 72 PMTs surround a 12 mm thick cylindrical NaI crystal with the diameter of 305 mm and axial height of 180 mm. The data acquisition system consists of 12 modules; each based on a Xilinx FPGA and Texas instrument TMS320C6000 DSP, reporting to a controlling PC via a Firewire network. The high performance of the FPGA and the digital signal processor have permitted a new implementation of the firmware and the pulse processing algorithm. The implementation of the de-centralized read-out system which is based on local environment processing has improved the count rate properties of the system and given an intrinsic spatial resolution of 3 mm (FWHM) at 140 keV.
Keywords :
collimators; data acquisition; digital readout; digital signal processing chips; field programmable gate arrays; gamma-ray detection; image resolution; image sensors; medical image processing; microcomputer applications; photomultipliers; single photon emission computed tomography; 12 mm; 140 keV; 180 mm; 305 mm; FPGA; Firewire network; PC; PMT; Texas instrument; Xilinx FPGA; count rate properties; cylindrical NaI crystal; cylindrical SPECT camera; data acquisition system; de-centralized read-out system; digital signal processor; intrinsic spatial resolution; pulse processing algorithm; rotating collimator; Cameras; Collimators; Control systems; Data acquisition; Digital signal processing; Digital signal processors; Field programmable gate arrays; Firewire; Instruments; Microprogramming;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2004 IEEE
Print_ISBN :
0-7803-8700-7
Electronic_ISBN :
1082-3654
DOI :
10.1109/NSSMIC.2004.1466712
