Awards

Remo Cristoforetti

• Creativity Award, matRad User Meeting and Hackathon, DKFZ 2025

Simona Facchiano

• Travel support by Equal Opportunity Funding of the Heidelberg Graduate School for Physics (HGSFP) to attend the PTCOG Conference 2025 in Buenos Aires

Jennifer Hardt

• Travel support by Equal Opportunity Funding of the Heidelberg Graduate School for Physics (HGSFP) to attend the PTCOG Conference 2025 in Buenos Aires

Margareta Metzner

• Outstanding Reviewer Award by IOP Publishing for the Journal Measurement Science and Technology

Karolin Milewski

• Poster Prize of the 4th Class of the Young Marsilius Fellows (YMF) Event „Dancing with Right and Wrong? An Interdisciplinary Symposium on Knowing, Doing and Not Being Sure." July 2025
• Poster Prize of the NCRO Retreat 2025 in Dresden, Oct. 2025

Ivan Muñoz Molina

• EURADOS Young Scientist Conference Support ((YSCS) 2025 – SSD21) to attend the 21st International Conference on Solid State Dosimetry, 8-13 June 2025, in Mexico City, Mexico.

Pamela Ochoa-Parra

• Travel support by Equal Opportunity Funding of the Heidelberg Graduate School for Physics (HGSFP) to attend the PTCOG Conference 2025 in Buenos Aires

Maike Saphörster

• Travel support by the Heidelberg Graduate School for Physics (HGSFP) to attend the International Workshop on Radiation Imaging Detectors in Hamburg, July 2025

Stefan Schmidt

• ENEN2plus Mobility grant to attend the 21st International Conference on Solid State Dosimetry 2025 in Mexico City, Mexcio
• Pianoforte: Travel grants for early career researchers to attend the 21st International Conference on Solid State Dosimetry 2025 in Mexico City, Mexcio
• One of the best posters presented at the DKFZ PhD Poster Presentation 2025

Christina Stengl

• Travel Grant of the 63rd Annual PTCOG Conference 2025 in Buenos Aires, Argentina
• Grant by the Gesellschaft for Schwerionenforschung (GSI) for Accomodation at the 21st International Conference on Solid State Dosimetry 2025 in Mexico City, Mexcio.
• 1. Behnken-Berger-Preis 2025 der Behnken-Berger-Stiftung
• Richtzenhain Doctoral Prize 2025

Simona Facchiano

• Travel support by Equal Opportunity Funding of the Heidelberg Graduate School for Physics (HGSFP) to attend the PTCOG Conference 2024 in Singapore.

Rebekka Kirchgässner

• Dietrich Harder Master's Thesis Award 2024 of the German Society for Medical Physics (DGMP) 2024
• 1st Prize of the Science Slam of the 6th Summer School in Medical Physics 2024, Heidelberg, Germany

Jennifer Hardt

• Travel support by Equal Opportunity Funding of the Heidelberg Graduate School for Physics (HGSFP) to attend the PTCOG Conference 2024 in Singapore. 

Margareta Metzner

• 2nd Poster Prize of the HGSFP Summer School 2024 in Molveno, Italy
• 2024 IEEE Nuclear Science Symposium, Medical Imaging Conference
  and Room Temperature Semiconductor Detectors Conference Trainee Grant, Tampa, Florida, USA, 2024
• PIANOFORTE travel grant to travel to IEEE Medical Imaging Concerence in Tampa, Florida, USA, 2024
• • DAAD travel grant, Conference Visit of 5th Ion Imaging Workshop Vienna, Austria, 2024

Christina Mooshammer

• 1st Poster Preis of the 6th Summer School in Medical Physics 2024, Heidelberg, Germany

Ivan Domingo Muñoz Molina

• 2nd Behnken-Berger Award 2024

Pamela Ochoa-Parra

• Travel Grant and Free Conference Registration for PTCOG in Singabore 2024 by the PTCOG Travel Fellowship Committee
• Travel support (accomodation) by Equal Opportunity Funding of the Heidelberg Graduate School for Physics (HGSFP) to attend the PTCOG Conference 2024 in Singapore.
• Travel support by Equal Opportunity Funding of the Heidelberg Graduate School for Physics (HGSFP) to attend the European Congress of Medical Physics (ECMP) 2024 in Munich, Germany

Cristiana Magalhães Correia Rodrigues

• 2nd Prize of the Science Slam of the 6th Summer School in Medical Physics 2024, Heidelberg, Germany

Annika Schlechter

• Christoph Schmelzer Prize of the Helmholtzzentrum für Schwerionenforschung GmbH (GSI) for her Master's Thesis

Christina Stengl

• Young Scientist Award & Audience Award of the National Decade against Cancer
• EURADOS Young Scientist Conference Support (YSCS) 2024 for participation in the European Radiation Dosimetry Group (EURADOS) Annual Meeting 2024 (Oxford, UK)
• Participant of the 73rd Lindau Nobel Laureate Meeting from June 30th - July 5th 2024 in Lindau, Germany
• Poster Award of the German Society for Medical Physics (DGMP) 2024 for the best poster at the ECMP 2024 in Munich, Germany

Mark Arndt

• 3rd Price of the Data Science Slam of the 5th Summer School in Medical Physics about "Data Science and Machine Learning in Radiotherapy" 2023

Viktoria Bayer

• Free conference participation for Solid State Dosimetry Conference (SSD20)

Rebekka Kirchgässner

• Travel Grant of the Verein zur Förderung der Tumortherapie mit schweren Ionen e.V. for the Particle Therapy COoperative Group (PTCOG) symposium in Madrid, Spain

Margareta Metzner

• Free conference participation for iWoRiD Conference 2023, by Verein zur Förderung der Tumortherapie mit schweren Ionen e.V.
• Travel support by equal opportunity funding of the Physics Faculty for the Particle Therapy COoperative Group (PTCOG) symposium in Madrid, Spain

Pamela Ochoa-Parra

• Travel support provided by the Equal Opportunity Funding of the Physics Faculty for the 2023 IEEE Nuclear Science Symposium, Medical Imaging Conference, and Room Temperature Semiconductor Detector Conference in Vancouver, Canada.
• Travel support granted by the Equal Opportunity Funding of the Physics Faculty for the Particle Therapy Cooperative Group (PTCOG) symposium in Madrid, Spain.
• Conference Trainee Grant awarded by the IEEE Nuclear Science Symposium, Medical Imaging Conference, and Room Temperature Semiconductor Detector Conference in Vancouver, Canada.

Patrick Salome

• Poster Award of the Berlin Science Week PostDoc Day 2023

Stefan Schmidt

• Travel support for participation in European Radiation Dosimetry Group (EURADOS) Annual Meeting 2023 (Porto, Portugal), by Verein zur Förderung der Tumortherapie mit schweren Ionen e.V.
• Young Scientist Conference Support (YSCS) 2023 for participation in the SSD20 - 20th International Conference on Solid State Dosimetry, from the European Radiation Dosimetry Group (EURADOS)

Luisa Schweins

• Christoph Schmelzer Prize of the Helmholtzzentrum für Schwerionenforschung GmbH (GSI)
• Travel Grant of the Verein zur Förderung der Tumortherapie mit schweren Ionen e.V. for the Particle Therapy COoperative Group (PTCOG) symposium in Madrid, Spain

Christina Stengl

• Poster Prize of the DKFZ PhD Retreat 2023

Sonja Surla

• Travel support by equal opportunity funding of the Physics Faculty for 9th MRinRT Symposium LA, USA HGSFP Directorate

Alexandra Walter

• Best Short Talk of 5th Scientific Retreat of the National Center for Radiation Research in Oncology (NCRO) 2023

Alina Elter

• 1st Behnken-Berger Prize 2022 (Dissertation)

Renato Félix Bautista

• Travel support to the European Conference of Medical Physics (ECMP) in Dublin, Ireland from „Verein zur Förderung der Tumortherapie mit schweren Ionen"

Jennifer Hardt

• Poster Prize, PTCOG 2022

Laurent Kelleter

• Travel support to the Particle Therapy COoperative Group (PTCOG) symposium in Miami, USA from „Verein zur Förderung der Tumortherapie mit schweren Ionen"

Margareta Metzner

• Dietrich-Harder Award for the best Master Thesis of DGMP

Pamela Ochoa Parra

• Travel support to the Particle Therapy COoperative Group (PTCOG) symposium in Miami, USA from „Verein zur Förderung der Tumortherapie mit schweren Ionen"
• Travel Fellowship to the Particle Therapy COoperative Group (PTCOG) symposium in Miami, USA from „Equal Opportunity Funding" at the Physics Faculty of Heidelberg University

Sonja Surla

• Travel grant from Heidelberg Graduate School for Physics (HGSFP)

Prof. Dr. Wolfgang Schlegel

• Röntgenplakette der Stadt Remscheid

Prof. Schlegel received the "Röntgenplakette" of the city of Remscheid for his outstanding research in the field of conformal intensity modulated radiotherapy:

https://roentgenmuseum.de/die-roentgenplakette/traeger-2020-2029/

As his former division, we would like to congratulate him for this honor and we are proud of his extra-ordinary research. Our division still benefits a lot from his work and we are proud to continue with his developments.

Anna Becker

• Best Oral Presentation, "15th International Symposium on Radiation Physics"
• Marie Sklodowska-Curie Fellowship Programme for Master's students from the International Atomic Energy Agency (IAEA)

 Alina Elter

• 2nd Place Young Investigator Session 2021, "Virtual 8th MRinRT Symposium 2021 Heidelberg"

Fabian Jäger

• Poster Prize sponsored by PTW-Freiburg (in the field of dosimetry in medicine or radiation physics), "Joint Conference of the SGSMP, DGMP, ÖGMP – Dreiländertagung der Medizinischen Physik"

Laurent Kelleter

• Travel Fellowship of the IEEE - Nuclear Science Symposium / Medical Imaging Conference in Yokohama, Japan

Ivan Munoz Molina

• Poster Prize, "Helmholtz International Graduate School for Cancer Research"

Margareta Metzner

• Travel Fellowship of the IEEE - Nuclear Science Symposium / Medical Imaging Conference in Yokohama, Japan 

Marcel Schäfer

• Free Conference Participation, "JURE and EARLI Conferences" (online), Gothenburg 2021

Jose Alberto Vedelago

• Attendee of the 70. Lindauer Nobelpreisträgertreffen, "Komitee des Lindauer Nobelpreisträgertreffens"

Alina Bendinger

• Christoph Schmelzer Award 2020 (Dissertation)

Alina Elter

• Registration fee grant, „51. Jahrestagung der DGMP virtuell"

Anna Fischer

• Registration fee grant „51. Jahrestagung der DGMP virtuell"

Laura Ghesquiere-Dierickx

• Trainee Travel Grand, "IEEE Nuclear Science Symposium and Medical Imaging Conference"

 Lisa Hintz

• Young Investigator Award (YIA), "ERRS2020 European Radiation Research Society 45th ERRS meeting"

Kai Dolde

• Paper "4D dose calculation for pencil beam scanning proton therapy of pancreatic cancer using repeated 4DMRI datasets" selected for the "PMB 2018 Highlights collection", Journal PMB 2019

Alina Elter

• Reisestipendium DGMP, DGMP Jahrestagung 2019 Stuttgart
• IOMP Travel Grant, IOMP Meeting Santiago de Chile DAAD 2019

Renato Félix Bautista

• Training Grant, IEEE 2019 conference, Manchester UK

Laura Ghesquiere-Dierickx

• PTCOG Travel Grant, PTCOG 58 Manchester 2019
• Poster Prize of the Helmholtz International Graduate School for Cancer Research 2019

Clarissa Gillmann

• Teilnahme Lindauer Nobelpreisträgertreffen, Komitee des Lindauer Nobelpreisträgertreffens 2019

Lisa Hintz

• Posterpreis "Radiobiology of UV, high LET radiation, and novel modalities; miscellaneous", DeGBS-Jahrestagung 2019 der Deutschen Gesellschaft für Biologische Strahlenforschung 2019

Alexander Neuholz

• Travel Grant DeGBS, Jahrestagung DeGBS Mannheim 2019

Isabell Paredes Cisneros

• Travel Grant DeGBS, Jahrestagung DeGBS Mannheim 2019

Peter Seitz

• Posterpreis der DGMP für ein hervorragendes Poster auf dem Gebiet der Medizinischen Physik, gefördert von VARIAN, Jahrestagung der DGMP 2019

Niklas Wahl

• Dissertationspreis, DEGRO Jahrestagung Müster 2019

Hans Peter Wieser

• 3rd Place Rising star, ICCR Conference Montreal Canada 2019

Rosario Astaburuaga

• 3rd Place Science Slam, 2nd Summer School in Medical Physics DKFZ - PTW 2018

Kai Dolde

• Travel Grant vom Verein zur Förderung der Tumortherapie mit schweren Ionen e.V. Research Visit PSI 2018
• DKFZ Graduate School Travel grant, Research Visit PSI 2018
• PTCOG Travel Grant, PTCOG Cincinnati USA 2018
• Poster Preis, 3rd Heidelberg Symposium on Novel Techniques in Ion Beam Radiotherapy 2018
• Roland Ernst-Preis für interdisziplinäre radiologische Forschung, Roland-Ernst Stiftung 2018

Laura Ghesquiere-Dierickx, Tim Gehrke

• 2nd place Science Slam FSE General Assembly 2018

Christian Möhler

• Behnken-Berger-Preis Behnken-Berger-Stiftung 2018
• Christoph Schmelzer Award 2018 (Dissertation), Verein zur Förderung der Tumortherapie mit schweren Ionen

Isabella Paredes Cisneros

• 1st Place Science Slam, 2nd Summer School in Medical Physics DKFZ - PTW 2018
• DAAD Travel grant, Research Visit  Universidad Catolica Santiago Chile

Mark Bangert

• Behnken-Berger-Preis Behnken-Berger-Stiftung 2017

Kai Dolde

• Best Presentation DKFZ PhD Retreat DKFZ PhD Retreat 2017
• ESTRO Mobility Grant Research Visit PSI 2017

Marco Müller

• AAPM Travel Grant given by GSI Darmstadt 2017

Wolfgang Schlegel

• Ehrenmitgliedschaft der DGMP DGMP 2017
• Ehrenmitgliedschaft der EFOMP EFOMP 2017

Niklas Wahl

• Poster Prize of the Helmholtz International Graduate School for Cancer Research DKFZ 2017

Raya Gallas

• Otto-Haxel-Preis für die beste experimentelle Arbeit im Master Fakultät für Physik und Astronomie Heidelberg 2016

Tim Gehrke

• Young Fellow Travel Award of the Particle Therapy COoperative Group (PTCOG) symposium in Prague PTCOG Prague 2016
• Poster Prize of the Helmholtz International Graduate School for Cancer Research DKFZ 2016

Christin Glowa

• Poster Award 19th Annual Meeting of the Society for Biological Rediation Research Gesellschaft für biologische Strahlenforschung (Erlangen, Germany, September 2016)

Christian Möhler

• Poster Prize of the Helmholtz International Graduate School for Cancer Research DKFZ 2016

Maria Saager

• Christoph Schmelzer Award 2015 (Dissertation) Verein zur Förderung der Tumortherapie mit schweren Ionen 2016

Wolfgang Schlegel

• Wissenschaftspreis "Forschung im Verbund" gemeinsam mit FITWM Kaiserslautern Stifterverband und Fraunhofer Gesellschaft 2016

Katharina Spindeldreier

• Young Scientist Award Solid State Dosimetry Konferenz 18 in München 2016

Markus Stoll

• Best Paper Award mit unserem Beitrag „TOWARDS COGNITIVE COMPUTER AIDED ENGINEERING“ NAFEMS Americas Conference 2016

Hendrik Teske

• Poster award: 2nd Heidelberg Symposium on Novel Techniques in Ion Beam Radiotherapy Organisation Committee of 2nd Heidelberg Symposium on Novel Techniques in Ion Beam Radiotherapy 2016

Niklas Wahl

• PhD-Slam Award NCRO-Retreat Dresden 2016

Eduardo Cisternas

• Best presentation award of IOMP and the Jack Cunningham Award of COMP/OCMP for the Presentation " matRad: a multimodality open source treatment planning toolkit" World Congress on Medical Physics and Biomedical Engineering, Toronto 2015

Philipp Mann

• 1st Award Science Slam Stuttgart Science Slam Stuttgart (“Gating – Grundlagen“) 2015
• Poster award: PHD Retreat DKFZ PhD-Program DKFZ 2015
• 1. Prize PhD Science Slam des NCRO Retreats (19.03.-21.03.) for the presentation: “Gating - Basic Principles and New Approaches” NCRO 2015

Anne Merle Reinhard

• Christoph Schmelzer Award 2015 Verein zur Förderung der Tumortherapie mit schweren Ionen

Thomas Wollmann

• Publikumspreis des MFG-Talente Preises im Rahmen des Karl-Steinbuch-Stipendiums MFG Stiftung Baden Württemberg 2015

Christin Glowa

• Christoph-Schmelzer-Award 2014 Verein zur Förderung der Tumortherapie mit schweren Ionen 2014

Nora Hünemohr

• Preis für den besten Wiss. Beitrag in der Zeitschrift für Medizinische Physik 2013 "ION range estimation by using dual engergy computed tomography" DGMP 2014

Pamela Mena

• Poster award: 36th ISEP/AAPM Workshop “ The Physics of advanced radiotherapy: The rule of medical images.” ISEP/AAPM Workshop Santiago de Chile 2014

Asja Pfaffenberger

• Roland Ernst Preis für interdisziplinäre radiologische Forschung Roland Ernst Stiftung 2014

Maria Saager

• Poster award: Workshop: "Precision, Speed and Flexibility: New radiation detection methods for ion beam radiotherapy" 2014

Martin Fast

• 3. Platz Behnken-Berger-Preis für Junge Nachwuchsforscher für den Bereich "Diagnostischer Einsatz von Röntgenstrahlung" Behnken-Berger-Stiftung auf der DGMP-Jahrestagung in Köln 2013

Maria Martisikova

• Top 20 referees of the Journal PMB in 2012 PMB Journal 2013
• Klaus-Georg und Sigrid Hengstberger-Preis für den wissenschaftlichen Nachwuchs der Universität Heidelberg Universität Heidelberg 2013

Pamela Mena

• Poster award: PhD programm of the DKFZ PhD-Program DKFZ 2013

Julia Osinga

• Posterpreis 17th International Conference on Solid State Dosimetry (SSD 17), Recife, Brasilien 2013

Wolfgang Schlegel

• Honor membership pf DEGRO DEGRO Jahrestagung Berlin durch Präsident Prof. Dunst 2013
• ONE of 50 Outstanding Medical Physicists during the Period 1963-2013 of IOMP IOMP 2013

Julia Telsemeyer

• Top 20 PMB Highlights of the Journal PMB in 2012 PMB Journal 2013

Georg Altenstein

• ESTRO Best Physics Poster Award ESTRO 31 Conference Barcelona 2012

Christin Glowa

• ESTRO Best Young Poster Award ESTRO 31 Conference Barcelona 2012

Bernadette Hartmann

• First Place Student Paper Award 2012 IEEE Nuclear Science Symposium Anaheim, Californien 2012

Nora Hünemohr

• Innovationspreis 2012 der DEGRO für den beitrag zur "Technologischen Entwicklung in der Radioonkologie" DEGRO 2012 Konferenz Wiesbaden verliehen durch die GfM (Gesellschaft für Medizintechnik) 2012

Thomas König

• Klaus Tschira Preis für Verständliche Wissenschaft für "Röntgen- aber bitte in Farbe" Klaus Tschira Stiftung 2012

Carine Legrand

• PTW-Dosimetriepreis DGMP 2012

Sarah Stefanowicz

• DGMP Elekta Posterpreis DGMP 2012

2011

Knopf A, Bert C, Heath E, Nill S, Kraus K, Richter D, Hug E, Pedroni E, Safai S, Albertini F, Zenklusen S, Boye D, Söhn M, Soukup M, Sobotta B, Lomax A:

• Varian Anerkennungspreis für Strahlentherapie der Schweizerischen Gesellschaft für Strahlenbiologie und Medizinische Physik (SGSMP) für „Special report: Workshop on 4D-treatment planning in actively scanned particle therapy – Recommendations, technical challenges, and future research directions“

Nora Hünemohr

• DGMP Posterpreis 2011

2010

Mark Bangert

• Preis fuer den besten Talk beim DKFZ Doktorandenretreat 2010

Julia Engelke

• EPI2kX Young Investigator Award 2010 / 11th international workshop on portal imaging 2010
• IEEE MIC 2010 Conference Trainee Grand 2010

Maria Martisikova

• Young Scientist Award - Best Oral presentation 16th International Conference on Solid State Dosimetry Sydney Australia 2010

Wolfgang Schlegel

• Glockner Medaille 2010 DGMP

2008

Antje Knopf

• ESTRO-Varian Award von der "European Society for Therapeutic Radiology and Oncology" für den Vorttrag "Quantitative Assessment of the reproducibility and the consistency of proton beam range verification with PET/CT" 2008

2007

Joanne Kang

• ICCR Presentation Award 2007

Simeon Nill

• Estro Best Physical Poster Award 2007

Martin Tacke

• Posterpreis PhD-Präsentation DKFZ Heidelberg 2007

2006

Irmtraud Reitz

• DGMP Poster Preis 2006

2004

Jan Unkelbach

• ICCR Presentation Award - Young Investigator 2004

2003

Martina Hub

• Siemens Young Investigator Award der DGMP 2003

Wolfgang Schlegel

• Deutscher Krebspreis für Klinische Forschung 2003

Christian Thieke

• ESTRO-Varian Research Award (Physics) 2003

2002

Bauer B, Schlegel W, Stein J

• Grand IST Prize 2003 of the "European Information Society" for the therapy planning program "KonRad" developed at DKFZ (awarded to MRC GmbH) 2002

Ina Kyas:

• MRC Young Investigator Award der DGMP 2002

2001

Gunilla Küster

• ICCR Presentation Award 2001

Wolfgang Schlegel, Thomas Bortfeld, Jürgen Debus

• Nominierung für Deutscher Zukunftspreis. Preis des Bundespräsidenten für Technik und Inovatio, für die Entwicklung "Optimierte Intensitätsmodulierte Strahlentherapie" 2001

1998

Thomas Haase, Marcus Rheinwald

• Posterpreis Forschungssymposium Tumorzentrum Heidelberg/Mannheim für das Poster " Intraoperative Fluoreszenzdiagnostik von Hirntumoren mit an Albumin gekoppeltem Fluorescin 1998

Marcus Rheinwald

• Presentation Award 1998 of the “Universität Nantes” for the outstanding presentation "Pharmacokinetic and photophysical properties of a polyethylene glycol derivative of mTHPC" 1998

1997

Christian Karger

• Travel Award 1997 of the “6th Symposium Experimentelle Strahlentherapie und klinische Strahlenbiologie“ for the outstanding presentation "Tierexperimentelle Bestimmung einer Dosis-Wirkungskurve für späte Strahlenschäden am normalen Hirngewebe nach Radiochirurgie mittels Magnetresonanz-Tomographie" 1997

Christian Lappe

• Young Investigator Travel Award Graduiertenforum DKFZ for outstanding Presentation "PPSU - A videogrammetric system for computer-controlled nonivasive patient positioning" 1997

1996

Christian Karger

• Bristol-Myers-Squibb Förderpreis der DEGRO für "Untersuchung später Strahlenschäden nach stereotaktischer Radiochirurgie mitels Magnetresonanz-Tomographie" 1996

Wolfgang Schlegel

• Karl-Beckurts-Preis für Entwicklung von neuen Verfahren zur Strahlenbehandlung von Tumorpatienten 1996

Jörg Stein

• Young Investigator Award der AAPM for "Optimum number and orientation of beams for intensity modulated treatments" 1996

1995

Thomas Bortfeld

• Young Investigator Award der AAPM for "Potential and limitations of dose-conformation with photons and protons" 1995

1994

Thomas Bortfeld

• Helax Prize "Experimental verification of multileaf conformal therapy 1994

1992

Rolf Bendl

• Posterpreis DKFZ Graduiertenprogramm "Voxelplan - Externe Therapieplanung, ein programm zur virtuellen Strahlentherapie Simulation" 1992

Marcus Menke

• Posterpreis DKFZ Graduiertenprogramm "Optische Messung von Patientenbewegungen und -fehlpositionen bei fraktionierter Strahlentherapie" 1992

Jürgen Pross

• Posterpreis DKFZ Graduiertenprogramm "TOMAS - Tool for manual Segmentation" 1992

Thomas Waschek

• Posterpreis DKFZ Graduiertenprogramm "Hochauflösende Densitometrie und interaktive digitale Bildanalyse zur molekularen Charakterisierung primärer Gentranskripte" 1992

1991

Thomas Bortfeld

• Richtzenhain-Preis für die Dissertation "Neue Methoden zur Lösung des Inversen Problems der Strahlentherapieplanung" 1991