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Dietrich Harder

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Ndimofor Chofor; Dietrich Harder; Björn Poppe
Non-reference condition correction factor kNR of typical radiation detectors applied for the dosimetry of high-energy photon fields in radiotherapy.
Ndimofor Chofor; Dietrich Harder; Kay C Willborn; Björn Poppe
Internal scatter, the unavoidable major component of the peripheral dose in photon-beam radiotherapy.
HK Looe; Björn Poppe; Y Uphoff; Dietrich Harder; Kay C Willborn
Numerical deconvolution to enhance sharpness and contrast of portal images for radiotherapy patient positioning verification.

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All Publications

2012: Ndimofor Chofor; Dietrich Harder; Björn Poppe
Non-reference condition correction factor kNR of typical radiation detectors applied for the dosimetry of high-energy photon fields in radiotherapy.
Zeitschrift für medizinische Physik 2012;22(3):181-96.
2012: Ndimofor Chofor; Dietrich Harder; Kay C Willborn; Björn Poppe
Internal scatter, the unavoidable major component of the peripheral dose in photon-beam radiotherapy.
Physics in medicine and biology 2012;57(6):1733-43.
2012: HK Looe; Björn Poppe; Y Uphoff; Dietrich Harder; Kay C Willborn
Numerical deconvolution to enhance sharpness and contrast of portal images for radiotherapy patient positioning verification.
Strahlentherapie und Onkologie : Organ der Deutschen Röntgengesellschaft ... [et al] 2012;188(2):185-90.
2011: Ndimofor Chofor; Dietrich Harder; Antje Rühmann; Kay C Willborn; Björn Poppe
Low-energy photons in high-energy photon fields--Monte Carlo generated spectra and a new descriptive parameter.
Zeitschrift für medizinische Physik 2011;21(3):183-97.
2011: Ndimofor Chofor; Dietrich Harder; Antje Rühmann; Kay C Willborn; Björn Poppe
A direction-selective flattening filter for clinical photon beams. Monte Carlo evaluation of a new concept.
Physics in medicine and biology 2011;56(14):4355-76.
2011: HK Looe; Dietrich Harder; Björn Poppe
Experimental determination of the effective point of measurement for various detectors used in photon and electron beam dosimetry.
Physics in medicine and biology 2011;56(14):4267-90.
2011: HK Looe; Dietrich Harder; Kay C Willborn; Björn Poppe
Iterative 2D deconvolution of portal imaging radiographs.
Zeitschrift für medizinische Physik 2011;21(1):52-64.
2010: Ndimofor Chofor; Dietrich Harder; Antje Rühmann; Kay C Willborn; Tilo Wiezorek; Björn Poppe
Experimental study on photon-beam peripheral doses, their components and some possibilities for their reduction.
Physics in medicine and biology 2010;55(14):4011-27.
2010: HK Looe; Dietrich Harder; Antje Rühmann; Kay C Willborn; Björn Poppe
Enhanced accuracy of the permanent surveillance of IMRT deliveries by iterative deconvolution of DAVID chamber signal profiles.
Physics in medicine and biology 2010;55(14):3981-92.
2010: Björn Poppe; HK Looe; Ndimofor Chofor; Antje Rühmann; Dietrich Harder; Kay C Willborn
Clinical performance of a transmission detector array for the permanent supervision of IMRT deliveries.
Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology 2010;95(2):158-65.
2009: Armand Djouguela; Dietrich Harder; Ralf Kollhoff; Simon Foschepoth; Wolfgang Kunth; Antje Rühmann; Kay C Willborn; Björn Poppe
Fourier deconvolution reveals the role of the Lorentz function as the convolution kernel of narrow photon beams.
Physics in medicine and biology 2009;54(9):2807-27.
2009: Ndimofor Chofor; Dietrich Harder; Hui Khee Looe; Ralf-Peter Kapsch; Ralf Kollhoff; Kay C Willborn; Antje Rühmann; Björn Poppe
Mapping radiation quality inside photon-irradiated absorbers by means of a twin-chamber method.
Zeitschrift für medizinische Physik 2009;19(4):252-63.
2008: Armand Djouguela; Irmgard Griessbach; Dietrich Harder; Ralf Kollhoff; Ndimofor Chofor; Antje Rühmann; Kay C Willborn; Björn Poppe
Dosimetric characteristics of an unshielded p-type Si diode: linearity, photon energy dependence and spatial resolution.
Zeitschrift für medizinische Physik 2008;18(4):301-6.
2007: Björn Poppe; Armand Djouguela; Arne Blechschmidt; Kay C Willborn; Antje Rühmann; Dietrich Harder
Spatial resolution of 2D ionization chamber arrays for IMRT dose verification: single-detector size and sampling step width.
Physics in medicine and biology 2007;52(10):2921-35.
2007: Ndimofor Chofor; HK Looe; R P Kapsch; Dietrich Harder; Kay C Willborn; Antje Rühmann; Björn Poppe
Characterization of the radiation quality of 60Co therapy units by the fraction of air kerma attributable to scattered photons.
Physics in medicine and biology 2007;52(7):N137-47.
2006: Armand Djouguela; Ralf Kollhoff; Antje Rühmann; Kay C Willborn; Dietrich Harder; Björn Poppe
Physical mechanism of the Schwarzschild effect in film dosimetry--theoretical model and comparison with experiments.
Physics in medicine and biology 2006;51(17):4345-56.
2006: Björn Poppe; Arne Blechschmidt; Armand Djouguela; Ralf Kollhoff; Antje Rubach; Kay C Willborn; Dietrich Harder
Two-dimensional ionization chamber arrays for IMRT plan verification.
Medical physics 2006;33(4):1005-15.
2006: Björn Poppe; C Thieke; D Beyer; Ralf Kollhoff; Armand Djouguela; Antje Rühmann; Kay C Willborn; Dietrich Harder
DAVID--a translucent multi-wire transmission ionization chamber for in vivo verification of IMRT and conformal irradiation techniques.
Physics in medicine and biology 2006;51(5):1237-48.
2006: Armand Djouguela; Dietrich Harder; Ralf Kollhoff; Antje Rühmann; Kay C Willborn; Björn Poppe
The dose-area product, a new parameter for the dosimetry of narrow photon beams.
Zeitschrift für medizinische Physik 2006;16(3):217-27.
2005: Dietrich Harder; George Iliakis
Wolfgang Pohlit (1928-2005).
Radiation research 2005;164(6):830-2.
2005: Armand Djouguela; Ralf Kollhoff; Antje Rubach; Dietrich Harder; Björn Poppe
The Schwarzschild effect of the dosimetry film Kodak EDR 2.
Physics in medicine and biology 2005;50(21):N317-21.
2005: Björn Poppe; Zanzem Atung; George Chofor; Arne Blechschmidt; Armand Djouguela; Ralf Kollhoff; Antje Rubach; Dietrich Harder
[Resolution and sensitivity of a two-dimensional ionisation chamber array (PTW type 10024)].
Zeitschrift für medizinische Physik 2005;15(4):287-91.
2005: Dietrich Harder; Nina Petoussi-Henss; Dieter Regulla; Maria Zankl; G Dietze
Comments on 'Are all photon radiations similar in large absorbers?--A comparison of electron spectra' by A.M. Kellerer and H.Roos.
Radiation protection dosimetry 2005;117(4):453-4; author reply 454.
2004: Dietrich Harder; Nina Petoussi-Henss; Dieter Regulla; Maria Zankl; G Dietze
Spectra of scattered photons in large absorbers and their importance for the values of radiation weighting factor wR.
Radiation protection dosimetry 2004;109(4):291-5.
2002: Ernst Schmid; Dieter Regulla; H-M Kramer; Dietrich Harder
The effect of 29 kV X rays on the dose response of chromosome aberrations in human lymphocytes.
Radiation research 2002;158(6):771-7.
2002: Dieter Regulla; Ernst Schmid; W Friedland; Werner Panzer; U Heinzmann; Dietrich Harder
Enhanced values of the RBE and H ratio for cytogenetic effects induced by secondary electrons from an X-irradiated gold gurface.
Radiation research 2002;158(4):505-15.
2002: Dietrich Harder; Rüdiger Greinert
Vibrational energy relaxation: proposed pathway of fast local chromatin denaturation.
Radiation protection dosimetry 2002;99(1-4):183-8.
2001: Dieter Regulla; Werner Panzer; Ernst Schmid; Günther Stephan; Dietrich Harder
Detection of elevated RBE in human lymphocytes exposed to secondary electrons released from X-irradiated metal surfaces.
Radiation research 2001;155(5):744-7.
2000: Rüdiger Greinert; O Boguhn; Dietrich Harder; Eckard W Breitbart; David L Mitchell; Beate Volkmer
The dose dependence of cyclobutane dimer induction and repair in UVB-irradiated human keratinocytes.
Photochemistry and photobiology 2000;72(5):701-8.
2000: Rüdiger Greinert; E Detzler; Dietrich Harder
The kinetics of postirradiation chromatin restitution as revealed by chromosome aberrations detected by premature chromosome condensation and fluorescence in situ hybridization.
Radiation research 2000;154(1):87-93.
1999: Rüdiger Greinert; C Thieke; E Detzler; O Boguhn; Dieter Frankenberg; Dietrich Harder
Chromosome aberrations induced in human lymphocytes by 3.45 MeV alpha particles analyzed by premature chromosome condensation.
Radiation research 1999;152(4):412-20.
1997: Rüdiger Greinert; Dietrich Harder
Biophysical analysis of the dose-dependent overdispersion and the restricted linear energy transfer dependence expressed in dicentric chromosome data from alpha-irradiated human lymphocytes.
Radiation and environmental biophysics 1997;36(2):89-95.
1997: G van Bebber; W Doeler; Rüdiger Greinert; Dietrich Harder
Applying local statistics to detect subtle G-bands in chromosomes.
Computers in biology and medicine 1997;27(2):169-75.
1996: Rüdiger Greinert; Dietrich Harder
On the formation kinetics of radiation-induced chromosome exchanges in human lymphocytes.
Radiation and environmental biophysics 1996;35(4):315-6.
1996: Rüdiger Greinert; B Volkmer; R P Virsik-Peuckert; Dietrich Harder
Comparative study of the repair kinetics of chromosomal aberrations and DNA strand breaks in proliferating and quiescent CHO cells.
International journal of radiation biology 1996;70(1):33-43.
1995: Rüdiger Greinert; E Detzler; B Volkmer; Dietrich Harder
Kinetics of the formation of chromosome aberrations in X-irradiated human lymphocytes: analysis by premature chromosome condensation with delayed fusion.
Radiation research 1995;144(2):190-7.
1993: T Rosenblatt; W Doeler; Ilka Ruschenburg; Manfred Droese; Dietrich Harder
Application of form features in digital cell analysis of non-Hodgkin's lymphomas.
Computers in biology and medicine 1993;23(6):483-95.
1990: A H Dietzel; J Hain; R P Virsik-Peuckert; Dietrich Harder
Algorithms for the evaluation of radiation induced chromosome aberration yields per cell from flow karyotypes.
Cytometry 1990;11(6):708-15.