Search Results - "Politte, D.G."
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1
Pose estimation of known objects during transmission tomographic image reconstruction
Published in IEEE transactions on medical imaging (01-10-2006)“…We address the problem of image formation in transmission tomography when metal objects of known composition and shape, but unknown pose, are present in the…”
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2
Deblurring subject to nonnegativity constraints when known functions are present with application to object-constrained computerized tomography
Published in IEEE transactions on medical imaging (01-10-2001)“…The reconstruction of tomographic images is often treated as a linear deblurring problem. When a high-density, man-made metal object is present somewhere in…”
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3
Corrections for accidental coincidences and attenuation in maximum-likelihood image reconstruction for positron-emission tomography
Published in IEEE transactions on medical imaging (01-03-1991)“…Reconstruction procedures that account for attenuation in forming maximum-likelihood estimates of activity distributions in positron-emission tomography are…”
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A method for the reconstruction of four-dimensional synchronized CT scans acquired during free breathing
Published in Medical physics (Lancaster) (01-06-2003)“…Breathing motion is a significant source of error in radiotherapy treatment planning for the thorax and upper abdomen. Accounting for breathing motion has a…”
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Parallelization of a fully 3D CT iterative reconstruction
Published in 2006 3rd IEEE International Symposium on Biomedical Imaging--Macro to Nano : Arlington, WA, 6-9 April 2006 (2006)“…Iterative image reconstruction algorithms for computed tomography are able to incorporate highly accurate physical models for the measured data. While such…”
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Conference Proceeding Journal Article -
6
Filter matrix estimation in automated DNA sequencing
Published in IEEE transactions on biomedical engineering (01-04-1998)“…In four-color fluorescence-based automated DNA sequencing, a 4/spl times/4 filter matrix parameterizes the relationship between the dye-intensity signals of…”
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Image improvements in positron-emission tomography due to measuring differential time-of-flight and using maximum-likelihood estimation
Published in IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (USA) (01-04-1990)“…Two distinctly different methods have been used to improve images produced in positron-emission tomography. The first method is to measure the differential…”
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Journal Article Conference Proceeding -
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Maximum likelihood methods for reconstructing an image in a region-of-interest for transmission tomography
Published in The Thrity-Seventh Asilomar Conference on Signals, Systems & Computers, 2003 (2003)“…Methods are described for forming a maximum-likelihood estimate of the attenuation density in a patient or object for transmission tomography in a region of…”
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Conference Proceeding -
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Veritas: Combining Expert Opinions without Labeled Data
Published in 2008 20th IEEE International Conference on Tools with Artificial Intelligence (01-11-2008)“…We consider a variation of the problem of combining expert opinions for the situation in which there is no ground truth to use for training. Even though we…”
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Conference Proceeding -
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Prospects for quantitative CT imaging in the presence of foreign metal bodies using statistical image reconstruction
Published in Proceedings IEEE International Symposium on Biomedical Imaging (2002)“…Radiation oncology treatment planning presents several challenges to CT imaging, including imaging in the presence of complex metal intracavitary applicators…”
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Conference Proceeding -
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Image reconstruction for positron-emission tomography when anatomical boundaries are known
Published in Conference Record of the 1991 IEEE Nuclear Science Symposium and Medical Imaging Conference (1991)“…Summary form only given, as follows. A method is proposed for improving estimates of radioactivity distributions obtained with PET (positron emission…”
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Conference Proceeding -
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The use of constraints to eliminate artifacts in maximum-likelihood image estimation for emission tomography
Published in IEEE transactions on nuclear science (01-02-1988)“…Images produced in emission tomography with unconstrained maximum-likelihood estimation techniques exhibit two artifacts as the likelihood hill is climbed and…”
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An Efficient Parallel Implementation Of The Em Algorithm For Pet Image Reconstruction Utilizing Transputers
Published in 1990 IEEE Nuclear Science Symposium Conference Record (1990)Get full text
Conference Proceeding -
14
Effects of Quantization of Time-of-Flight (TOF) Measurements on Image Signal-to-Noise Ratio in TOF Emission Tomography
Published in IEEE transactions on nuclear science (01-01-1983)“…An effort to predict the signal-to-noise ratio performance in positron-emission tomography as a function of the number of levels used in quantizing the…”
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