Search Results - "Politte, D.G."

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  1. 1

    Pose estimation of known objects during transmission tomographic image reconstruction by Murphy, R.J., Yan, S., O'Sullivan, J.A., Snyder, D.L., Whiting, B.R., Politte, D.G., Lasio, G., Williamson, J.F.

    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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    Journal Article
  2. 2

    Deblurring subject to nonnegativity constraints when known functions are present with application to object-constrained computerized tomography by Snyder, D.L., O'Sullivan, J.A., Whiting, B.R., Murphy, R.J., Benac, J., Cataldo, J.A., Politte, D.G., Williamson, J.F.

    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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    Journal Article
  3. 3

    Corrections for accidental coincidences and attenuation in maximum-likelihood image reconstruction for positron-emission tomography by Politte, D.G., Snyder, D.L.

    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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    Journal Article
  4. 4

    A method for the reconstruction of four-dimensional synchronized CT scans acquired during free breathing by Low, Daniel A., Nystrom, Michelle, Kalinin, Eugene, Parikh, Parag, Dempsey, James F., Bradley, Jeffrey D., Mutic, Sasa, Wahab, Sasha H., Islam, Tareque, Christensen, Gary, Politte, David G., Whiting, Bruce R.

    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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    Journal Article
  5. 5

    Parallelization of a fully 3D CT iterative reconstruction by Keesing, D.B., O'Sullivan, J.A., Politte, D.G., Whiting, B.R.

    “…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. 6

    Filter matrix estimation in automated DNA sequencing by Weian Huang, Fuhrmann, D.R., Politte, D.G., Thomas, L.J., States, D.J.

    “…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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    Journal Article
  7. 7

    Image improvements in positron-emission tomography due to measuring differential time-of-flight and using maximum-likelihood estimation by Politte, D.G.

    “…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
  8. 8

    Maximum likelihood methods for reconstructing an image in a region-of-interest for transmission tomography by Snyder, D.L., O'Sullivan, J.A., Murphy, R.J., Politte, D.G., Whiting, B.R., Williamson, J.F.

    “…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
  9. 9

    Veritas: Combining Expert Opinions without Labeled Data by Cholleti, S.R., Goldman, S.A., Blum, A., Politte, D.G., Don, S.

    “…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
  10. 10

    Prospects for quantitative CT imaging in the presence of foreign metal bodies using statistical image reconstruction by Williamson, J.F., Whiting, B.R., Benac, J., Murphy, R.J., Blaine, G.J., O'Sullivan, J.A., Politte, D.G., Snyder, D.L.

    “…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
  11. 11

    Image reconstruction for positron-emission tomography when anatomical boundaries are known by Politte, D.G., Snyder, D.L.

    “…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
  12. 12

    The use of constraints to eliminate artifacts in maximum-likelihood image estimation for emission tomography by Politte, D.G., Snyder, D.L.

    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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    Journal Article
  13. 13
  14. 14

    Effects of Quantization of Time-of-Flight (TOF) Measurements on Image Signal-to-Noise Ratio in TOF Emission Tomography by Politte, David G., Holmes, Timothy J., Snyder, Donald L.

    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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    Journal Article