Scholarly Works - Journal articles
Journal article
Eur Radiol
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December 2013
OBJECTIVES: To investigate the impact of an adaptive statistical iterative reconstruction (ASiR) algorithm on diagnostic accuracy and confidence for the diagnosis of hypervascular liver tumours, as well as the reader's perception of image quality, using a ...
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Radiology
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June 2011
PURPOSE: To estimate patient-specific radiation dose and cancer risk for pediatric chest computed tomography (CT) and to evaluate factors affecting dose and risk, including patient size, patient age, and scanning parameters. MATERIALS AND METHODS: The inst ...
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Progress in Biomedical Optics and Imaging Proceedings of SPIE
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June 15, 2009
The purpose of this study is to develop a method for estimating patient-specific dose from abdomen-pelvis CT examinations and to investigate dose variation across patients in the same weight group. Our study consisted of seven pediatric patients in the sam ...
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Journal article
IEEE Nuclear Science Symposium Conference Record
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January 1, 2008
In this paper, we present an ultra low-dose CT acquisition and reconstruction technique that provides sufficient image quality for PET attenuation correction while keeping the CT dose to a minimum. With PET/CT, CT is used instead of radioactive transmissio ...
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IEEE Nuclear Science Symposium Conference Record
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January 1, 2005
To investigate the relationship between NEC and image quality in 2D and 3D PET, while simultaneously optimizing 3D low energy threshold (LET), we have performed a series of phantom measurements. The phantom consisted of 46 1 cm fillable hollow spheres on a ...
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Journal article
IEEE Nuclear Science Symposium Conference Record
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January 1, 2005
A new PET detector block has been designed to replace the standard detector of the Discovery ST PET/CT system. The new detector block Is the same size as the original, but consists of an 8×6 (tangential x axial) matrix of crystals rather than the original ...
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Journal article
IEEE Nuclear Science Symposium Conference Record
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January 1, 2004
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The performance of a PET scanner on three different phantom sizes was studied as a function of low energy threshold (LET). Phantom cross sections ranged from 20 cm diameter circular to 28 cm × 43 cm oval and LET's ranged from 350 keV to 475 keV, in 25 keV ...
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Journal article
J Nucl Med
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December 1991
A standard set of performance measurements is proposed for use with positron emission tomographs. This set of measurements has been developed jointly by the Computer and Instrumentation Council of the Society of Nuclear Medicine and the National Electrical ...
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Journal article
IEEE Transactions on Nuclear Science
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January 1, 1983
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Journal article
IEEE Transactions on Nuclear Science
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January 1, 1981
Featured Work
The design of any positron emission tomograph involves some compromises. In particular, the simultaneous goals of high sensitivity and good resolution have resulted in circular ring systems using relatively large crystals and rotation/wobbling motions. The ...
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Journal article
J Nucl Med
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August 1980
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A method to correct for the spatial distortions of gamma cameras has been developed. The method consists of two parts: measuring spatial distortions and repositioning events during accumulation. Distortions are measured using a pattern consisting of parall ...
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Journal article
Phys Med Biol
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January 1980
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Fully three-dimensional positron emission tomography is considered and a reconstruction algorithm derived. The reconstruction problem is formulated mathematically as a three-dimensional convolution integral of a point spread function with an unknown positr ...
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Journal article
IEEE Transactions on Nuclear Science
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January 1, 1980
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The use of Anger-type bar cameras for positron imaging results in a totally stationary system. In addition, the design is cost effective since the Anger principle will provide many resolution elements using only a few crystals and photomultipliers. Pulse s ...
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Journal article
Computer Graphics and Image Processing
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December 1977
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