ArticleMedical physics2023
Performance evaluation of resolution and sensitivity of C-SPECT's variable slat-stack collimator.
Article in Medical physics, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
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Who cites it
2 citing papers in PubMed.
- Instrumentation Digital Twins in PET and SPECT Imaging: Current Status, Challenges, and Future Directions.Computational and structural biotechnology journal · 2026Review
- Energy Scale-Factor Estimation for Use in Photomultiplier Tube Energy Calibration Using C-SPECT.IEEE transactions on radiation and plasma medical sciences · 2025Article
Corrections and comments
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Authors and funding
4 authors.
Funding
Abstract
backgroundMyocardial perfusion imaging is commonly performed using SPECT, where both general-purpose and dedicated scanners are available. A limitation with general-purpose systems has been the inability to image dynamically since different projections are obtained far apart in time due to scanner rotation. Dedicated systems can have this capability since they acquire completely sampled projections (i.e., those with enough angular views for reconstruction) with short time frames. C-SPECT, does not need any scanner or patient motion to obtain complete projections, allowing fast dynamics. When imaging fast dynamics, the optimal collimator settings are not necessarily the same as for static imaging, where longer acquisitions can be utilized. Thus, C-SPECT offers adaptive collimation in the transverse and axial directions. PURPOSE: The performance of adaptation in the axial direction was characterized herein.
methodsThe ratio of the resolution metric in high-sensitivity mode to that in the high-resolution mode, termed resolution boost factor, was determined. Analogously, the sensitivity boost factor was also determined. Comparisons were made with theory and simulations.
resultsThe boost factors for resolution and sensitivity, averaged over the 14 modules of the system, were determined to be 1.72 and 1.75, respectively.
conclusionsThe boost factors, which ideally would be two, were between 10% and 15% below optimal values and tracked each other, suggesting mechanical challenges in the apparatus, such as incomplete closure of adjacent slats, but show reasonably successful adaptation between modes.
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