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We have carried out experiments to assess the performance advantage of high quantum efficiency (HQE) photomultiplier tubes (PMTs) over conventional PMTs for possible use in a cardiac SPECT system. In particular, we have conducted tests of pulse height resolution and position sensitivity of HQE PMTs and compared their performance to conventional PMTs. Furthermore, we have conducted a cathode sensitivity...
We have investigated the feasibility of utilizing high resolution pixellated NaI(Tl) detectors for C-SPECT, a high performance imaging system to be designed for cardiac applications. Conventional 1.5?? single-anode PMTs were used as light detection devices. A detector module with 2.9 ?? 2.9 ?? 5 mm3 pixels (Saint-Gobain) was evaluated in terms of decoding map quality and energy resolution. Furthermore,...
Pinhole collimators are widely used for SPECT imaging of small organs and animals. There also has been renewed interest in using pinhole collimation for clinical cardiac SPECT imaging, which uses multiple pinhole arrays to achieve high sensitivity and complete data sampling. Overall sensitivity of a pinhole array is critical in determining a system's performance. Conventionally, a point source model...
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