KIT | KIT-Bibliothek | Impressum | Datenschutz

Quantitative comparison of planar coded aperture imaging reconstruction methods

Meißner, T. 1; Rozhkov, V.; Hesser, J.; Nahm, W. 1; Loew, N.
1 Institut für Biomedizinische Technik (IBT), Karlsruher Institut für Technologie (KIT)

Abstract:

Imaging distributions of radioactive sources plays a substantial role in nuclear medicine as well as in monitoring nuclear waste and its deposit. Coded Aperture Imaging has been proposed as an alternative to parallel or pinhole collimators, but requires image reconstruction as an extra step. Multiple reconstruction methods with varying run time and computational complexity have been proposed. Yet, no quantitative comparison between the different reconstruction methods has been carried out so far. This paper focuses on a comparison based on three sets of hot-rod phantom images captured with an experimental Gamma-camera consisting of a Tungsten-based MURA mask with a 2mm thick 256x256 pixelated CdTe semiconductor detector coupled to a Timepix readout circuit. Analytical reconstruction methods, MURA Decoding, Wiener Filter and a convolutional Maximum Likelihood Expectation Maximization (MLEM) algorithm were compared to data-driven Convolutional Encoder-Decoder (CED) approaches. The comparison is based on the contrast-to-noise ratio as it has been previously used to assess reconstruction quality. For the given set-up, MURA Decoding, the most commonly used CAI reconstruction method, provides robust reconstructions despite the assumption of a linear model. ... mehr


Volltext §
DOI: 10.5445/IR/1000155576
Veröffentlicht am 02.02.2023
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Biomedizinische Technik (IBT)
Publikationstyp Forschungsbericht/Preprint
Publikationsjahr 2022
Sprache Englisch
Identifikator KITopen-ID: 1000155576
Umfang 25 S.
Vorab online veröffentlicht am 29.04.2022
Schlagwörter gamma camera, SPECT, PET PET/CT, coronary CT angiography (CTA), image reconstruction in medical imaging, medical-image reconstruction methods and algorithms, computer-aided diagnosis, search for radioactive and fissile materials
Nachgewiesen in arXiv
Dimensions
Relationen in KITopen
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page