Non-invasive determination of myocardial oxygen consumption with "C-acetate and positron emission tomography / Michael A. Brown.Brown, Michael A., 1954- January 1994 (has links)
Bibliography: leaves 94-106. / v, 106,  leaves,  leaves of plates : / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Assessment of myocardial metabolism with radiolabelled substrates and positron emission tomography provides a potentially sensitive technique to investigate physiological and pathological cardiac states "in vitro". Prior studies have indicated that overall metabolic activity cannot be estimated from rates of utilization of any one particular substrate. It was hypothesized that acetate labelled with carbon-11 would provide an index of oxidative metabolism, based on fundamental biochemical principles. The hypothesis is confirmed in studies using isolated perfused rabbit hearts and closed chest canine studies. / Thesis (M.D.)--University of Adelaide, Dept. of Medicine, 1995
20 October 2010
Accurate tumor tracking remains as a major challenge in radiation therapy. Large margins are added to the clinical target volume (CTV) to ensure the treatment of tumor in presence of patient setup uncertainty and that caused by intra-motion. Fiducial seeds and calypso markers are commonly implanted into the disease sites to further reduce the dose delivery error due to tumor motion. For more accurate dose delivery and improved patient comfort, the use of radioactive tracers in positron emission tomography (PET) as non-invasive tumor markers has been proposed - a concept called emission-guided radiation therapy (EGRT). Instead of using images obtained from a stand-alone PET scanner for treatment guidance, we mount a positron imaging system on a radiation therapy machine. Such an EGRT system is able to track the tumor in real time based on the lines of response (LOR) of the tumor positron events, and perform radiation therapy simultaneously. In this work, we illustrate the EGRT concept using computer simulations and propose a typical treatment scheme. EGRT's advantage on increased dose delivery accuracy is demonstrated using a pancreas tumor case and a lung tumor case without the setup margin and motion margin. The emission process is simulated by Geant4 Application for Tomographic Emission package and Linac dose delivery is simulated using a voxel-based Monte Carlo algorithm. The tumor tracking error can be controlled within 2 mm which indicates margins can be significantly reduced. The dose distributions show that the proposed EGRT can accurately deliver the prescribed dose to the CTV with much less margins. Although still in a preliminary research stage, EGRT has the potential to substantially reduce tumor location uncertainties and to greatly increase the performance of current radiation therapy.
Characterization of transport of positron emission tomography tracer 3'-deoxy-3'-fluorothymidine by nucleoside transportersPaproski, Robert Joseph. January 2010 (has links)
Thesis (Ph.D.)--University of Alberta, 2009. / A thesis submitted to the Faculty of Graduate Studies and Research in partial fulfillment of the requirements for the degree of Doctor of Philosophy, Oncology. Title from pdf file main screen (viewed on January 30, 2010). Includes bibliographical references.
Diss. (sammanfattning) Stockholm : Karol. inst., 2003. / Härtill5 uppsatser.
Diss. (sammanfattning) Uppsala : Univ., 2002. / Härtill 5 uppsatser.
Imaging-based dynamic liver testing : studies of segmental hepatic parenchymal function and biliary flow using dynamic ⁹⁹Tcm-HIDA SPECT /Jonas, Eduard, January 2002 (has links)
Diss. (sammanfattning) Stockholm : Karol. inst., 2002. / Härtill 5 uppsatser.
Development, validation and application of advanced neuroimaging analysis tools for in vivo neuroreceptor studies /Cselényi, Zsolt, January 2005 (has links)
Diss. (sammanfattning) Stockholm : Karol. inst., 2005. / Härtill 5 uppsatser.
Diss. (sammanfattning) Stockholm : Karolinska institutet, 2005. / Härtill 5 uppsatser.
Diss. (sammanfattning) Stockholm : Karolinska institutet, 2006. / Härtill 5 uppsatser.
Newton, Jessica R.
Thesis (M.S.)--University of Missouri-Columbia, 2006. / The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Vita. "December 2006" Includes bibliographical references.
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