Search Results - "Wells, R.G"

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    A comparison of human and model observers in multislice LROC studies by Gifford, H.C., King, M.A., Pretorius, P.H., Wells, R.G.

    Published in IEEE transactions on medical imaging (01-02-2005)
    “…Model and human observers have been compared in a series of localization receiver operating characteristic (LROC) studies involving single-slice and multislice…”
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    Journal Article
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    Increased ADAMTS‐13 proteolytic activity in rat hepatic stellate cells upon activation in vitro and in vivo by NIIYA, M., UEMURA, M., ZHENG, X. W., POLLAK, E. S., DOCKAL, M., SCHEIFLINGER, F., WELLS, R. G., ZHENG, X. L.

    Published in Journal of thrombosis and haemostasis (01-05-2006)
    “…Introduction: ADAMTS‐13 is a member of ADisintegrin And Metalloprotease with ThromboSpondin type 1 repeats (ADAMTS) family, primarily synthesized in hepatic…”
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    Journal Article
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    LROC analysis of detector-response compensation in SPECT by Gifford, H.C., King, M.A., Wells, R.G., Hawkins, W.G., Narayanan, M.V., Pretorius, P.H.

    Published in IEEE transactions on medical imaging (01-05-2000)
    “…Localization ROC (LROC) observer studies examined whether detector response compensation (DRC) in ordered-subset, expectation-maximization (OSEM)…”
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    Journal Article Conference Proceeding
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    The high affinity Na+/glucose cotransporter. Re-evaluation of function and distribution of expression by WEN-SEN LEE, KANAI, Y, WELLS, R. G, HEDIGER, M. A

    Published in The Journal of biological chemistry (22-04-1994)
    “…We report the primary structure, functional characterization, and tissue distribution of the high affinity Na+/glucose cotransporter SGLT1 from rat kidney. Rat…”
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    Journal Article
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    Effect of excess dietary sodium, potassium, calcium and phosphorus on excreta moisture of laying hens by Smith, A., Rose, S.P., Wells, R.G., Pirgozliev, V.

    Published in British poultry science (01-12-2000)
    “…1. Four experiments were conducted to investigate the effects of dietary concentrations of sodium, potassium, calcium or phosphate on the water intake and…”
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    Journal Article
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    Effect of block-iterative acceleration on Ga-67 tumor detection in thoracic SPECT by Gifford, H.C., King, M.A., Narayanan, M.V., Pretorius, P.H., Smyczynski, M.S., Wells, R.G.

    Published in IEEE transactions on nuclear science (01-02-2002)
    “…A combination of human localization receiver operating characteristic (LROC) and channelized Hotelling observer (CHO) ROC psychophysical studies were used to…”
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    Journal Article
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    Single-slice versus multi-slice display for human-observer lesion-detection studies by Wells, R.G., King, M.A., Gifford, H.C., Pretorius, P.H.

    Published in IEEE transactions on nuclear science (01-06-2000)
    “…Use of a single-slice (2D) display for observer studies may bias results acid reduce the studies' clinical generalizability. Human observers perform better at…”
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    Journal Article
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    Analytical calculations of cross-talk for dual-isotope SPECT projections by Wells, R.G., Celler, A., Harrop, R.

    Published in IEEE transactions on nuclear science (01-06-2000)
    “…Simultaneous dual-isotope SPECT scans are clinically desirable because they require less acquisition time than sequential scans, and provide perfect spatial…”
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    Journal Article
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    The impact of noisy and misaligned attenuation maps on human-observer performance at lesion detection in SPECT by Wells, R.G., Gifford, H.C., Pretorius, P.H., Famcombe, T.H., Narayanan, M.V., King, M.A.

    Published in IEEE transactions on nuclear science (01-06-2002)
    “…We have demonstrated an improvement due to attenuation correction (AC) at the task of lesion detection in thoracic SPECT images. However, increased noise in…”
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    Journal Article
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    The impact of ROI definition on estimator performance on FBP reconstructed Ga-67 SPECT images by Wells, R.G., Gifford, H.C., King, M.A.

    Published in IEEE transactions on nuclear science (01-06-2000)
    “…Quantitative accuracy of reconstructed images depends not only on the reconstruction strategy, but also on the definition of the estimator. The authors…”
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    Journal Article
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    Reduce, reuse and recycle: A green solution to Canada's medical isotope shortage by Galea, R., Ross, C., Wells, R.G.

    Published in Applied radiation and isotopes (01-05-2014)
    “…Due to the unforeseen maintenance issues at the National Research Universal (NRU) reactor at Chalk River and coincidental shutdowns of other international…”
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    Journal Article
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    Anatomical priors to improve image quality in small-animal SPECT/CT by Wells, R.G.

    “…With the advent of SPECT/CT, high-quality coregistered anatomical information is now readily available and can be incorporated into the SPECT reconstruction…”
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    Conference Proceeding
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    Analytical calculation of photon distributions in SPECT projections by Wells, R.G., Celler, A., Harrop, R.

    Published in IEEE transactions on nuclear science (01-12-1998)
    “…In this paper the authors present a method for analytically calculating the distribution of photons detected in single photon emission computed tomography…”
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    Journal Article
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    A comparison of human observer LROC and numerical observer ROC for tumor detection in SPECT images by Gifford, H.C., Wells, R.G., King, M.A.

    Published in IEEE transactions on nuclear science (01-08-1999)
    “…Numerical observers that predict human performance in medical detection tasks can relieve some of the burden of conducting psychophysical studies. Research for…”
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    Journal Article
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    Respiratory-motion errors in quantitative myocardial perfusion with PET/CT by Shkvorets, M., deKemp, R.A., Wells, R.G.

    “…Respiratory motion is known to cause errors in whole-body oncologic and static cardiac imaging with PET/CT. These errors are caused by the difference in…”
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    Conference Proceeding
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    Investigating pinhole SPECT for wrist imaging by Sabondjian, E., Wells, R.G.

    “…The wrist consists of eight small carpal bones, which may be as small as 1 cm/sup 3/. This makes the wrist one of the most complex joints to image. Initial…”
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    Conference Proceeding
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    The effect of changing the excreta moisture of caged laying hens on the excreta and microbial contamination of their egg shells by Smith, A., Rose, S.P., Wells, R.G., Pirgozliev, V.

    Published in British poultry science (01-05-2000)
    “…1. An experiment that included 1440 caged laying hens in 24 experimental units was conducted to determine the effect of differences in excreta moisture on the…”
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    Journal Article
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    The 4F2 antigen heavy chain induces uptake of neutral and dibasic amino acids in Xenopus oocytes by WELLS, R. G, WEN-SEN LEE, KANAI, Y, LEIDEN, J. M, HEDIGER, M. A

    Published in The Journal of biological chemistry (05-08-1992)
    “…The 4F2 cell surface antigen is a disulfide-linked heterodimer induced during the process of cellular activation and expressed widely in mammalian tissues…”
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    Journal Article