&lt;title&gt;Constructing a small laboratory animal imaging device based on scintillating fibers&lt;/title&gt;

Anderson, J. A.; Fernando, Johann L.; Nguyen, Ton; Prior, John O.; Constantinescu, A; Parkey, Robert W.; Antich, Peter P.; Chaney, Roy C.; Hammack, H.; Fenyves, E.

doi:10.1117/12.161920

Cited by 6 publications

(2 citation statements)

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“…The low-Z polystyrene inner annulus accentuates scatter, while the outer NaI(Tl) annulus accentuates PEA. Representative existing materials properties were used (Anderson et al 1993. Detailed design studies were not undertaken to optimize the performance of this detector model either for geometry or material.…”

Section: Computational Resultsmentioning

confidence: 99%

Analytic treatment of resolution precision in electronically collimated SPECT imaging involving multiple-interaction gamma rays

et al. 1998

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The widely applied single-interaction analytic expression characterizing the energy resolution component of the angular resolution precision for an electronically collimated point source is extended to include multiple-interaction Compton scatter sequences as well as sequences terminated by photoelectric absorption. The analytic formulation is developed using the statistical variance of the mean for components comprising composite, multivariate resolution precision estimators. It is demonstrated that enhanced resolution precision in the incident interaction scatter angle is attained when use is made of information from multiple interactions. An improvement in the resolution precision of up to approximately 40% is observed for triple Compton scatter. Comparison of the analytic estimates with Monte Carlo/chi-square results shows good agreement.

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Section: Computational Resultsmentioning

confidence: 99%

Analytic treatment of resolution precision in electronically collimated SPECT imaging involving multiple-interaction gamma rays

et al. 1998

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“…The simulated photon transport data were generated using a conceptual truncated-ellipsoid position-sensitive fibre tri-annular head detector model based on representative existing materials properties (Anderson et al 1993. This configuration was chosen using a parametric computational study to approximately maximize the number of 3cs detector sequences.…”

Section: Computational Modelling Development and Simulated Data Creationmentioning

confidence: 99%

SPECT electronic collimation resolution enhancement using chi-square minimization

et al. 1998

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An electronic collimation technique is developed which utilizes the chi-square goodness-of-fit measure to filter scattered gammas incident upon a medical imaging detector. In this data mining technique, Compton kinematic expressions are used as the chi-square fitting templates for measured energy-deposition data involving multiple-interaction scatter sequences. Fit optimization is conducted using the Davidon variable metric minimization algorithm to simultaneously determine the best-fit gamma scatter angles and their associated uncertainties, with the uncertainty associated with the first scatter angle corresponding to the angular resolution precision for the source. The methodology requires no knowledge of materials and geometry. This pattern recognition application enhances the ability to select those gammas that will provide the best resolution for input to reconstruction software. Illustrative computational results are presented for a conceptual truncated-ellipsoid polystyrene position-sensitive fibre head-detector Monte Carlo model using a triple Compton scatter gamma sequence assessment for a 99mTc point source. A filtration rate of 94.3% is obtained, resulting in an estimated sensitivity approximately three orders of magnitude greater than a high-resolution mechanically collimated device. The technique improves the nominal single-scatter angular resolution by up to approximately 24 per cent as compared with the conventional analytic electronic collimation measure.

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PET detector using waveshifting optical fibers and microchannel plate PMT with delay line readout

Williams

Sealock

Majewski

et al. 1998

IEEE Trans. Nucl. Sci.

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<title>Constructing a small laboratory animal imaging device based on scintillating fibers</title>

Cited by 6 publications

References 0 publications

Analytic treatment of resolution precision in electronically collimated SPECT imaging involving multiple-interaction gamma rays

Analytic treatment of resolution precision in electronically collimated SPECT imaging involving multiple-interaction gamma rays

SPECT electronic collimation resolution enhancement using chi-square minimization

PET detector using waveshifting optical fibers and microchannel plate PMT with delay line readout

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