Zobrazeno 1 - 6
of 6
pro vyhledávání: '"Kay Willborn"'
Autor:
Johannes A. Langendijk, Antje-Christin Knopf, Jana Kretschmer, Leonie Brodbek, Arturs Meijers, Björn Poppe, Stefan Both, Kay Willborn, Hui Khee Looe
Publikováno v:
Medical Physics, 47(9), 4589-4601. Wiley
Purpose: The introduction of advanced treatment techniques in proton therapy, such as intensity-modulated proton therapy, leads to an increased need for patient-specific quality assurance, especially an accurate treatment plan verification becomes in
Publikováno v:
Physics in Medicine and Biology. 55:4011-4027
The component analysis of the peripheral doses produced at typical accelerators such as the Siemens Primus 6/15 is regarded as an approach enabling technical strategies towards the reduction of second malignancies associated with photon beam radiothe
Autor:
Ralf-Peter Kapsch, N Chofor, Kay Willborn, A. Rühmann, Björn Poppe, Dietrich Harder, Hui Khee Looe, Ralf Kollhoff
Publikováno v:
Zeitschrift für Medizinische Physik. 19:252-263
In photon-beam radiotherapy, the absorbed dose in an irradiated object contains a contribution by energy-degraded photons originating from Compton scatter processes at parts of the treatment head and within the absorber itself. These low-energy spect
Publikováno v:
Zeitschrift fur medizinische Physik. 21(3)
The varying low-energy contribution to the photon spectra at points within and around radiotherapy photon fields is associated with variations in the responses of non-water equivalent dosimeters and in the water-to-material dose conversion factors fo
Autor:
N Chofor, Björn Poppe, Dietrich Harder, A. Rühmann, Ralf-Peter Kapsch, Hui Khee Looe, Kay Willborn
Publikováno v:
Physics in medicine and biology. 52(7)
In this work we present a new parameter for characterizing the emitted photon spectra of (60)Co radiotherapy units. It is intended to propose this parameter for the revised DIN standard 6809-1. In the previous DIN regulation, it had been sufficient t
Autor:
Björn Poppe, Ralf Kollhoff, A. Rühmann, D Beyer, Kay Willborn, Christian Thieke, Dietrich Harder, Armand Djouguela
Publikováno v:
Physics in medicine and biology. 51(5)
Permanent in vivo verification of IMRT photon beam profiles by a radiation detector with spatial resolution, positioned on the radiation entrance side of the patient, has not been clinically available so far. In this work we present the DAVID system,