ArticleIEEE transactions on radiation and plasma medical sciences2020
Effects of TOF Resolution Models on Edge Artifacts in PET Reconstruction from Limited-Angle Data.
Article in IEEE transactions on radiation and plasma medical sciences, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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Who cites it
12 citing papers in PubMed.
- Deep unrolled regularization for limited-angle dual-panel positron emission mammography.Physical and engineering sciences in medicine · 2026Article
- Deep learning-based restoration of PET images from a dual-panel breast dedicated scanner.Zeitschrift fur medizinische Physik · 2026Article
- Time-of-flight: The last frontier in positron emission tomography instrumentation.Zeitschrift fur medizinische Physik · 2026Review
- Image reconstruction and elongation artifact reduction for a dual-panel dedicated prostate PET scanner.Medical physics · 2026Article
- Impact of detector parameters and image resolution modeling on dedicated brain PET imaging.IEEE transactions on radiation and plasma medical sciences · 2025Article
- Initial demonstration of the Scratch-PET concept: an intraoperative PET with a hand-held detector.Radiological physics and technology · 2025Article
- Design and proof of concept of a double-panel TOF-PET system.EJNMMI physics · 2024Article
- Recovery of the spatially-variant deformations in dual-panel PET reconstructions using deep-learning.Physics in medicine and biology · 2024Article
- 2D feasibility study of joint reconstruction of attenuation and activity in limited angle TOF-PET.IEEE transactions on radiation and plasma medical sciences · 2021Article
- Time of Flight in Perspective: Instrumental and Computational Aspects of Time Resolution in Positron Emission Tomography.IEEE transactions on radiation and plasma medical sciences · 2021Article
- One-View Time-of-Flight Positron Emission Tomography Reconstruction.IEEE transactions on radiation and plasma medical sciences · 2021Article
- TOF-PET Image Reconstruction With Multiple Timing Kernels Applied on Cherenkov Radiation in BGO.IEEE transactions on radiation and plasma medical sciences · 2020Article
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3 authors.
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Abstract
Limited-angle data, such as data obtained from a dual-panel Breast-PET scanner, result in substantial image blur in directions coinciding with the missing cone of the image spectrum. On systems with time-of-flight (TOF) capabilities, this blur is reduced as given by the TOF uncertainty, with the image spectrum being correspondingly expanded into the missing spectral cone. Modeling of the TOF uncertainty in the reconstruction is expected to deconvolve this residual TOF blurring. We have however observed that, as a tradeoff, this TOF de-blurring process also introduces ringing artifacts at the edges, analogous to the edge effects observed with line-of-response (LOR) resolution modeling, which attempts to deconvolve the blur due to detector resolution effects. However, in the former case, the ringing artifacts are much wider due to the spatial extent of the TOF uncertainty as compared to the width of typical LOR resolution blur. We illustrate and investigate the effects of using matched, as well as under-modeled and over-modeled, TOF kernels on edge artifacts in reconstruction from limited-angle data, and compare them with TOF reconstructions of complete data. Although for the conventional data with full angular coverage the reconstruction is fairly insensitive to the exact size of the TOF kernel and TOF modeling does not produce ringing artifacts, it is not the case for the limited-angle data. We show that it is important to use some form of regularization of the TOF uncertainty deconvolution process within reconstruction of the limited-angle data, such as decreasing the TOF kernel size.
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