论文信息 - Determination of the analytical point spread function of a pinhole aperture SPECT system

Determination of the analytical point spread function of a pinhole aperture SPECT system

Pinhole aperture in single photon emission computed tomography (SPECT) imaging system provides high spatial resolution for quantitative measurement. In this paper, we propose a new analytical method to calculate the PSF of a pinhole SPECT system where the response of the crystal is taken into account. The PSF is calculated as the convolution of the pinhole and the crystal responses. A general method to calculate the pinhole response is introduced using a decomposition of the pinhole geometry in single mathematical elements. The crystal response is derived analytically using the distribution of the optical photons on the photodetector surface. As a conclusion, both the pinhole response and the optical distribution give similar results compared to the one obtained with Monte Carlo simulation for a reduced computing time.

V. Bekaert | D. Brasse | B. Gizard | J.-L. Guyonnet

[1] Ronald J. Jaszczak,et al. Analytic determination of pinhole collimator sensitivity with penetration , 2001, IEEE Transactions on Medical Imaging.

[2] R J Jaszczak,et al. An analytic model of pinhole aperture penetration for 3D pinhole SPECT image reconstruction. , 1998, Physics in medicine and biology.

[3] Hiroshi Watabe,et al. Evaluation of penetration and scattering components in conventional pinhole SPECT: phantom studies using Monte Carlo simulation. , 2003, Physics in medicine and biology.

[4] Freek J Beekman,et al. Monte Carlo simulations of pinhole imaging accelerated by kernel-based forced detection. , 2002, Physics in medicine and biology.