Pius-Hospital and Carl-von-Ossietzky University Oldenburg, Germany

Working Group Medical Radiation Physics
Prof. Dr. Björn Poppe

The Pius-Hospital Oldenburg is the largest catholic hospital in North-Western Germany and the center for modern radiotherapy in the region.
The Working Group Medical Radiation Physics  (www.uni-oldenburg.de/medical-radiation-physics) is a cooperative venture between the hospital and the physics department of the University of Oldenburg. Therefore the research environment is strongly influenced by questions regarding the applicability in clinical practice combined with physical background and scientific exactness.

Cooperation with PTW was intensified in 2001 when the group joined the project for the development of the
2D-ARRAY seven29. Several applications such as IMRT plan verification and quality assurance routines have been introduced since then. In addition, international training sessions for 2D-ARRAY seven29 users are held twice per year in Oldenburg and abroad too if desired (if you are interested in this, please contact your PTW supplier).

PTW's new DAVID system for in-vivo verification of conformal and intensity modulated radiation fields is being developed in collaboration with Pius-Hospital, Carl-von-Ossietzky University, Oldenburg and Goettingen University.

The DAVID system was awarded the innovation price of the German Society for Radiation Oncology (DEGRO) in 2006.

In addition, new detector types and measuring systems such as point detectors for dose measurements with high spatial resolution or the StarCheck system for precise LINAC QC are regularly evaluated for clinical applicability in Oldenburg. Comprehensive PTW measuring and quality control equipment is also used in our routine work in medical physics.
Studies illustrating the fruitful cooperation can be found at
www.uni-oldenburg.de/medical-radiation-physics/publications.html

Latest Publications:

H. K. Looe, D. Harder, A. Rühmann, K. C. Willborn, B. Poppe,
Enhanced accuracy of the permanent surveillance of IMRT deliveries by iterative deconvolution correction of DAVID chamber signal profiles,
accepted by Phys. Med. Biol (2010)

B. Poppe, H.K. Looe, N. Chofor, A. Rühmann
Clinical Performance of the DAVID System, a Transmission Detector Array for the Permanent Supervision of IMRT Deliveries,
accepted by Radiotherapy and Oncology (2010)

A. Djouguela, I. Griessbach, D. Harder, R. Kollhoff, N. Chofor, A. Rühmann, K. Willborn, B. Poppe,
Dosimetric characteristics of an unshielded p-type si-diode: linearity, photon energy dependence and spatial resolution applications of the unshielded Si diode PTW 60012,
Z. Med. Phys. 18 (2008) 301-306

B. Poppe, A. Djouguela, A. Blechschmidt, K. C. Willborn, A. Rühmann and D. Harder
Spatial resolution of 2D ionization chamber arrays for IMRT dose verification: single detector size and sampling step width
Phys. Med. Biol. 52 (2007) 2921-2935

B. Poppe, C. Thieke, D. Beyer, R. Kollhoff, A. Djouguela, A. Rühmann, K. C. Willborn, D. Harder
DAVID - A translucent multi-wire transmission ionization chamber for in-vivo verification of IMRT and conformal irradiation techniques
Phys. Med. Biol. 51 (2006) 1237-1248

A. Djouguela, R. Kollhoff, A. Rühmann, K. C. Willborn, D. Harder, B. Poppe
The dose-area product, a new parameter for the dosimetry of narrow photon beams
Z. Med. Phys. 16 (2006) 217-227

B. Poppe, A. Blechschmidt, A. Djouguela, R. Kollhoff, A. Rubach, D. Harder
Two-dimensional ionization chamber arrays for IMRT plan verification
Med. Phys. 33 (2006) 1005-1015

Contact address:

Prof. Dr. Björn Poppe
WG Medical Radiation Physics
Pius-Hospital and Carl-von-Ossietzky University
Georgstr. 12
26121 Oldenburg, Germany
 bjoern.poppe[at]uni-oldenburg.de