Previous visitors

Thomas Ravkilde - Aarhus University Hospital - October/November 2013


Thomas Ravkilde

Thomas Ravkilde is currently a Ph.D. student at Aarhus University and Aarhus University Hospital, Denmark. He completed his B.Sc. in physics and M.Sc. in astronomy at Aarhus University in collaboration with Institut d'Astrophysique Spatiale and The University of Cergy-Pontoise, France, working on computational modelling of magnetohydrodynamic shocks in star forming interstellar clouds. He then went on to work in IT for six years before returning to research. His current research is on dose delivery to moving tumours using dynamic multi-leaf collimator (DMLC) tracking. During his visit, he took initial steps for implementation of real-time dose reconstruction into prototype DMLC tracking software.

Dr Alanah Bergman - British Columbia Cancer Centre - September/October 2013


Alanah Bergman

Dr Bergman is visiting the Radiation Physics Laboratory for four to six weeks as part of her special education leave from the British Columbia Cancer Centre (Vancouver, Canada). She is a senior clinical physicist with academic ties to the University of British Columbia (lectures & supervising post-graduate students). Dr Bergman is assisting with the Respiratory Motion Guided - 4D CBCT project and her goal is to deliver respiration-optimized CBCT projection acquisitions on the RNSH's TrueBeam medical linear accelerator using the unit's Research and Developer Mode. Dr Bergman is here with her family and is looking forward to her collaboration here at the University of Sydney as well as spending time exploring the rest of Australia.

Joerg Rottman, PhD - Research Fellow in Radiation Oncology, Brigham and Women's Hospital, Boston MA - May 2013


Joerg Rottman

Dr. Joerg Rottmann is currently a Research Fellow at the Harvard Medical School (Brigham and Women's Hospital / Dana-Farber Cancer Institute). He completed his PhD in physics at the University of Heidelberg in conjunction with the German Cancer Research Center and the Brigham and Women's Hospital / Harvard Medical School. His current research projects focus on improving the delivery of lung SBRT by incorporating motion mitigation with a dynamic multi-leaf collimator.

Kinga Bernatowicz - Swiss Federal Institute of Technology Zürich - January/March 2013


Kinga Bernatowicz

Kinga Bernatowicz is a Ph.D. student from Swiss Federal Institute of Technology Zürich, completing her research on proton therapy image guidance at the Paul Scherrer Institute (PSI) with Dr. Knopf and Prof. Lomax. She completed a joint program of MSc. in Nuclear Engineering at Swiss Federal Universities, which concluded with the thesis improving proton delivery techniques for the foreseen liver patients’ treatment. During her three months in Sydney she will be working on 4D CT image acquisition.





Rebecca Fahrig - Stanford University – November/December 2012


Rebecca Fahrig

Dr. Rebecca Fahrig is an associate professor in the Department of Radiology at Stanford University. She obtained a BSc in Physics (1989) and an MSc in Medical Biophysics (1992) at the University of Toronto, and a PhD from the Robarts Research Institute at the University of Western Ontario, also in Medical Biophysics (1999). Her research covers a wide range of topics in x-ray and CT physics, with an emphasis on image guidance during minimally invasive procedures. She is PI on several NIH-funded projects including 'Real-time Imaging for Transbronchial Needle Biopsy Guidance' and 'kV-MV Imaging for Metal Artifact Reduction in Radiation Therapy Treatment Planning'. Collaborators include researchers from Sydney University and the University of Erlangen-Nurnberg, and from Siemens Medical, Varian Ginzton and TripleRing Inc.


Esben Worm - Aarhus University Hospital – May 2012


Esben Worm

Motion management in image-guided radiotherapy

Esben Worm is a medical physicist from Aarhus University Hospital, Denmark, currently working on a PhD within the area of radiotherapy. The aim of his work is to improve the geometric accuracy of the radiation dose delivered to tumors where motion during treatment presents a special challenge. His work focuses on stereotactic body radiotherapy for tumors in the liver. This includes image-based motion monitoring, motion management, reconstruction of the actual radiation dose delivered during treatment to a moving tumor, and optimization and implementation of clinical treatment strategies.



Stefan Kolling - University of Heidelberg - March/December 2012


Stefan Kolling

Magnetic modeling of the MLC for the Australian MRI-Linac program

Stefan completed his undergraduate studies with a BSc. in Physics at the RWTH Aachen University, Germany, in 2010. During his time in Aachen, he worked as research assistant in the field of fluorescence-based medical diagnostics at the Fraunhofer Institute for Laser Technology. Following that, he transferred to the University of Heidelberg to undertake an MSc. in Medical Physics and worked for the German Cancer Research Centre (DKFZ) in Heidelberg. Due to his strong interest in image-guided radiation therapy, Stefan decided to join Prof. Keall's group where his masters research will contribute to the MRI-LINAC project.



Dr Tokihiro Yamamoto - Stanford University - April/May 2011


Dr Tokihiro Yamamoto

CT-based pulmonary ventilation imaging: physiologic validations toward applications in radiation oncology and beyond

Tokihiro Yamamoto, Ph.D. is currently a Postdoctoral Fellow in the Department of Radiation Oncology at Stanford University. He completed his Ph.D. through a formal education/training in medical physics in Japan. In 2007, he moved to Stanford and received a postdoctoral training under the mentorship of Paul Keall, Ph.D. for more than three years. His research interests focus on the functional imaging techniques for improving the therapeutic ratio of radiotherapy. He has authored/co-authored 19 peer-review papers to date.



Dr Yelin Suh - Stanford University - March/April 2011


Dr Yelin Suh

4D IMRT Treatment Planning with Respiratory Phase-Dependent Leaf Sequences: Early Planning and Delivery Results

Dr Yelin Suh completed her PhD in Medical Physics at Virginia Commonwealth University and joined Professor Paul Keall's group as a postdoctoral scholar at Stanford University in 2009. Dr Suh’s current research projects include 4D radiotherapy treatment planning and delivery.



Dr Per Poulsen - Aarhus University - March 2011


Dr Per Poulsen

Dr Per Poulsen is a medical physicist at Aarhus University Hospital, Denmark, specializing in tumor motion management. He spent two years (2007-09) with Paul Keall's research group at Stanford University, focusing on image-based DMLC tracking. Current research topics include liver tumor motion in SBRT, marker segmentation algorithms, image-based DMLC tracking, and electromagnetic-based DMLC tracking.