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Analytical modeling of collimator response for a compact stationary parallel-hole SPECT system

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Abstract
In SPECT imaging, stationary systems have been developed to avoid several of the practical issues associated with traditional SPECT systems, based on rotating gamma-cameras. Stationary SPECT systems are, however, usually designed in such a way that the scanner needs to be much larger than the object to be imaged, limiting them to imaging small objects. To overcome this problem, we have recently proposed an innovative design for a highly compact stationary SPECT system [1], using a collimator with parallel-holes whose direction depends on their axial position. To accurately reconstruct an object using this system, we need to take into account its complex collimator geometry and the fact that the collimator and detectors are very close to the image-space, which is not considered in traditional parallel-hole collimator modeling. In this paper we describe an analytical method to accurately model the projection of an image voxel onto the detector. We then validate the method with Monte Carlo simulations.

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Chicago
da Rocha Vaz Pato, Lara, Stefaan Vandenberghe, Pedro Luis Esquinas, and Roel Van Holen. 2015. “Analytical Modeling of Collimator Response for a Compact Stationary Parallel-hole SPECT System.” In 2015 International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine, Proceedings, 103–106.
APA
da Rocha Vaz Pato, L., Vandenberghe, S., Esquinas, P. L., & Van Holen, R. (2015). Analytical modeling of collimator response for a compact stationary parallel-hole SPECT system. 2015 International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine, Proceedings (pp. 103–106). Presented at the 2015 International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine.
Vancouver
1.
da Rocha Vaz Pato L, Vandenberghe S, Esquinas PL, Van Holen R. Analytical modeling of collimator response for a compact stationary parallel-hole SPECT system. 2015 International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine, Proceedings. 2015. p. 103–6.
MLA
da Rocha Vaz Pato, Lara, Stefaan Vandenberghe, Pedro Luis Esquinas, et al. “Analytical Modeling of Collimator Response for a Compact Stationary Parallel-hole SPECT System.” 2015 International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine, Proceedings. 2015. 103–106. Print.
@inproceedings{6837888,
  abstract     = {In SPECT imaging, stationary systems have been developed to avoid several of the practical issues associated with traditional SPECT systems, based on rotating gamma-cameras. Stationary SPECT systems are, however, usually designed in such a way that the scanner needs to be much larger than the object to be imaged, limiting them to imaging small objects. To overcome this problem, we have recently proposed an innovative design for a highly compact stationary SPECT system [1], using a collimator with parallel-holes whose direction depends on their axial position. To accurately reconstruct an object using this system, we need to take into account its complex collimator geometry and the fact that the collimator and detectors are very close to the image-space, which is not considered in traditional parallel-hole collimator modeling. In this paper we describe an analytical method to accurately model the projection of an image voxel onto the detector. We then validate the method with Monte Carlo simulations.},
  author       = {da Rocha Vaz Pato, Lara and Vandenberghe, Stefaan and Esquinas, Pedro Luis and Van Holen, Roel},
  booktitle    = {2015 International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine, Proceedings},
  language     = {eng},
  location     = {Newport, Rhode Island, US},
  pages        = {103--106},
  title        = {Analytical modeling of collimator response for a compact stationary parallel-hole SPECT system},
  year         = {2015},
}