Susan Billingsley

Learn More
PURPOSE To examine error rates in the delivery of radiation therapy (RT), technical factors associated with RT errors, and the influence of a quality improvement intervention on the RT error rate. METHODS AND MATERIALS We undertook a review of all RT errors that occurred at the Princess Margaret Hospital (Toronto) from January 1, 1997, to December 31,(More)
PURPOSE To assess perfusion changes within brain and correlate these with clinical symptoms during whole brain radiotherapy (WBRT) for cerebral metastases. MATERIALS AND METHODS Fourteen patients with cerebral metastases underwent dynamic CT perfusion scans during palliative whole brain irradiation. Perfusion scans were performed on Day 1 prior to initial(More)
Accurate knowledge of placental lactogen localization is fundamental to any hypothesis of its synthesis and secretion. We used locally generated monoclonal and polyclonal antibodies from three separate sources to localize ovine placental lactogen immunoreactivity on light and electron microscope Lowicryl K4M sections of ovine placentomes of 97-145 days of(More)
PURPOSE To evaluate the impact of computed tomographic (CT) planning in comparison to clinical mark-up (CM) for palliative radiation of chest wall metastases. METHODS AND MATERIALS In patients treated with CM for chest wall bone metastases (without conventional simulation/fluoroscopy), two consecutive planning CT scans were acquired with and without an(More)
ii ACKNOWLEDGMENTS I must thank Dr. Lance Porter for his outstanding guidance, vast experience, and fantastic sense of humor throughout the past year. Without his supervision, I may never have made it past the research phase of this project. Credit also goes to my other committee members: Dr. Anne Osborne for her helpful insight and suggestions along the(More)
The sites of intracellular synthesis and storage of human placental lactogen (hPL) and human chorionic gonadotropin (hCG) are controversial. We have used one of the most sensitive methods, cryoultramicrotomy and immunogold labelling, to localise these hormones at the electron-microscopic level. In both 12-week and term placentas hCG and hPL are present(More)
  • 1