2024/09/04 by Lucas Polson, Pedro L. Esquinas, Polson, Lucas +17
Engineering · Medicine · Physics and Astronomy · #Advanced X-ray and CT Imaging #FOS: Physical sciences #Medical Imaging Techniques and Applications #Medical Physics (physics.med-ph) #Nuclear Physics and Applications
paper · pdf · doi:10.48550/arxiv.2409.03100
openalex publication_date 2024/09/04 · openalex created_date 2024/10/19 · openalex updated_date 2026/08/01
Modeling of the collimator-detector response (CDR) in SPECT reconstruction enables improved resolution and accuracy, and is thus important for quantitative imaging applications such as dosimetry. The implementation of CDR modeling, however, can become a computational bottleneck when there are substantial components of septal penetration and scatter in the acquired data, since a direct convolution-based approach requires large 2D kernels. This work proposes a 1D convolution and rotation-based CDR model that reduces reconstruction times but maintains consistency with models that employ 2D convolutions. To enable open-source development and use of these models in image reconstruction, we release a SPECTPSFToolbox repository for the PyTomography project on GitHub.