Design and Development of a High Performance Pinhole Array Dual Head SPECT Using Monte Carlo Simulation
Keywords:
Dual head SPECT, SPECT instrumentation, pinhole SPECT and GATEAbstract
The Purpose of this study is to investigate the
performance of a dual head SPECT system having an array of pinholes as a collimator. Several analytical methods are used to evaluate the performance of the given pinhole array detector module design. Monte Carlo simulation studies using Geant4
Application for Tomographic Emission (GATE) validate the
performance of this novel dual head SPECT where a cylindrical
water phantom is imaged. We are proposing a pinhole array
detector module with 48mm by 48mm of active area behind an
array of 100 pinholes laid out in a 10 by 10 lattice. This
configuration allows high detection efficiency and excellent
sensitivity in SPECT imaging. The system is based on a
pixelated array of NaI crystals (100 × 100 × 10mm elements)
coupled with an array of position sensitive photomultiplier
tubes (PSPMTs). The basic characteristics of this system were
evaluated with pinhole apertures of 0.5mm, 1mm, 1.5mm, 2mm,
2.5mm and 3mm respectively. A conventional filtered back
projection algorithm was used to reconstruct the images.
Performance evaluation of this system indicates that high
quality images can be obtained for in vivo imaging.
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