Dirk Geismar

719 citations

25 papers · 493 indexed · h-index 11

Impact in

Otorhinolaryngology top 2%
- Head and Neck Cancer Studies
Radiation top 5%
- Advanced Radiotherapy Techniques
- Radiation Detection and Scintillator Technologies

Papers in

Radiation 14
- Advanced Radiotherapy Techniques 14
- Radiation Detection and Scintillator Technologies 3
Otorhinolaryngology 5
- Head and Neck Cancer Studies 5

Co-authors: Beate Timmermann Michaël Baumann Volker Budach Martin Stuschke Wilfried Budach Peter Wust Klaus‐Dieter Wernecke Klaus Jahnke
Journals: Radiotherapy and Oncology (5 papers)International Journal of Radiation Oncology*Biology*Physics (3 papers)Journal of Clinical Oncology (3 papers)Zeitschrift für Medizinische Physik (2 papers)Medical Physics (1 paper)
Partner nations: Germany Sweden United States

In The Last Decade

Dirk Geismar

25 papers receiving 480 citations

Peers

Countries citing papers authored by Dirk Geismar

Since Specialization

Citations

This map shows the geographic impact of Dirk Geismar's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Dirk Geismar with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Dirk Geismar more than expected).

Fields of papers citing papers by Dirk Geismar

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Dirk Geismar. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Dirk Geismar. The network helps show where Dirk Geismar may publish in the future.

Co-authors

The 25 scholars most cited alongside Dirk Geismar, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with Dirk Geismar Line = papers co-authored together Dirk Geismar links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

#	Work
1	Is an Endorectal Balloon Beneficial for Rectal Sparing after Spacer Implantation in Prostate Cancer Patients Treated with Hypofractionated Intensity-Modulated Proton Beam Therapy? A Dosimetric and Radiobiological Comparison Study Current Oncology ·Helder Cravo da Costa, Jörg Wulff, Amsalu, Dirk Geismar, Christian Bäumer, D. Cosi, S. Kumar, Stefanie Schulze Schleithoff, Stephan Tschirdewahn, Boris Hadaschik, Beate Timmermann	2023	1
2	Dosimetric feasibility of moderately hypofractionated/dose escalated radiation therapy for localised prostate cancer with intensity-modulated proton beam therapy using simultaneous integrated boost (SIB-IMPT) and impact of hydrogel prostate-rectum spacer Radiation Oncology ·Helder Cravo da Costa, Amsalu, Dirk Geismar, Jörg Wulff, Christian Bäumer, Paul H. Kramer, S. Kumar, Kartal Horasanli, 龚婵媛, Олег Юрьевич Лукашов, Stephan Tschirdewahn, Boris Hadaschik, Beate Timmermann	2022	2
3	RONC-17. Feasibility of proton therapy with and without simultaneous chemotherapy in CNS malignancies of children and adolescents Neuro-Oncology ·Manuel José Pedraza Gracia, Stephan Tippelt, Julia Zeller, Dirk Geismar, Danny Jazmati, Sarah Peters, Beate Timmermann, RW Hosken, Gudrun Fleischhack	2022	1
4	Feasibility of Proton Beam Therapy as a Rescue Therapy in Heavily Pre-Treated Retinoblastoma Eyes Cancers ·Eva Biewald, Ishteyaq Majeed Shah, Dirk Geismar, Selina Finger, Jay Muszynsky, Henrike Westekemper, Jörg Wulff, Beate Timmermann, Petra Ketteler, Stefan Schönberger, K. Metz, Saskia Ting, Sophia Göricke, Nikolaos E. Bechrakis, Norbert Bornfeld	2021	7
5	Clinical Implementation of Proton Therapy Using Pencil-Beam Scanning Delivery Combined With Static Apertures Frontiers in Oncology ·Christian Bäumer, 龚婵媛, Helder Cravo da Costa, Dirk Geismar, D. Cosi, K. Kroeninger, Nova Bila, Jörg Wulff, Beate Timmermann	2021	17
6	Identification of patient benefit from proton beam therapy in brain tumour patients based on dosimetric and NTCP analyses Radiotherapy and Oncology ·Syurmi Astuti, Armin Lühr, Esther G.C. Troost, Linda Agolli, Rebecca Bütof, Chiara Valentini, Michaël Baumann, Zhang Xiuku, Dirk Geismar, Beate Timmermann, Mechthild Krause, Steffen Löck	2021	10
7	Modelling of late side-effects following cranial proton beam therapy Radiotherapy and Oncology ·Syurmi Astuti, Armin Lühr, Linda Agolli, Rebecca Bütof, Chiara Valentini, Esther G.C. Troost, Michaël Baumann, Zhang Xiuku, Dirk Geismar, Nayan Lamba, Emily S. Lebow, 雅樹小久保, J. Daly, Marc R. Bussière, Mechthild Krause, Beate Timmermann, Helen A. Shih, Steffen Löck	2021	9
8	Intraarterial Chemotherapy for Retinoblastoma – Initial Experiences of a German Reference Centre Klinische Monatsblätter für Augenheilkunde ·Ishteyaq Majeed Shah, Selina Finger, Nikolaos E. Bechrakis, Norbert Bornfeld, Sophia Göricke, Petra Ketteler, Saskia Ting, Dirk Geismar, Eva Biewald	2021	3
9	Model-based comparison of organ at risk protection between VMAT and robustly optimised IMPT plans Zeitschrift für Medizinische Physik ·R. Maenner, Jan Haussmann, Paul H. Kramer, Johannes A. Langendijk, H. Gottschlag, Dirk Geismar, Wilfried Budach, Beate Timmermann	2020	4
10	Long-Term Clinical Results and Management following Vitrectomy in Undetected Retinoblastoma Eyes Ocular Oncology and Pathology ·Eva Biewald, Selina Finger, Nikolaos E. Bechrakis, Ishteyaq Majeed Shah, 高天丽, Dirk Geismar, K. Metz, Sophia Göricke, Petra Ketteler, Norbert Bornfeld	2020	3
11	Outcome and Patterns of Relapse in Childhood Parameningeal Rhabdomyosarcoma Treated With Proton Beam Therapy International Journal of Radiation OncologyBiologyPhysics ·J. Doyen, Danny Jazmati, Dirk Geismar, Sabine Frisch, Stefanie Schulze Schleithoff, Zhang Xiuku, Monika Scheer, 政智宮里, Stephan Tippelt, Beate Timmermann	2019	18
12	Motion effects in proton treatments of hepatocellular carcinoma—4D robustly optimised pencil beam scanning plans versus double scattering plans Physics in Medicine and Biology ·江西省农业科学研究院, Helder Cravo da Costa, Ning Yao, Christian Bäumer, Oliver Blanck, M Chan, Erik Engwall, Dirk Geismar, Sarah Peters, 龚婵媛, Onwuka Chidi Okorie, Beate Timmermann, Jörg Wulff	2018	16
13	Development and validation of NTCP models for acute side-effects resulting from proton beam therapy of brain tumours Radiotherapy and Oncology ·Syurmi Astuti, Armin Lühr, Linda Agolli, Esther G.C. Troost, Mechthild Krause, Michaël Baumann, Zhang Xiuku, Dirk Geismar, Emily S. Lebow, 雅樹小久保, J. Daly, Marc R. Bussière, Beate Timmermann, Helen A. Shih, Steffen Löck	2018	34
14	Comprehensive clinical commissioning and validation of the RayStation treatment planning system for proton therapy with active scanning and passive treatment techniques Physica Medica ·Christian Bäumer, Dirk Geismar, Fleur Stevenhagen, Paul H. Kramer, J. Lambert, Madeline Lemke, 龚婵媛, Adenike S. Lawal, L.A.H. Haakstad, S Balakannan, Beate Timmermann, Zhang Xiuku	2017	28
15	Profile of European proton and carbon ion therapy centers assessed by the EORTC facility questionnaire Radiotherapy and Oncology ·Damien C. Weber, Suwannee Phumeetham, Alessandra Bolsi, Andrzej Kacperek, R. Dendale, Dirk Geismar, Barbara Bachtiary, 鄭貴和, Jens Heufelder, Klaus Herfarth, Jürgen Debus, Maurizio Amichetti, Mechthild Krause, Roberto Orecchia, Vladimír Vondráček, Juliette Thariat, 徐娅娟, Kristina Nilsson, Cai Grau	2017	31
16	Experimental validation of a 4D dose calculation routine for pencil beam scanning proton therapy Zeitschrift für Medizinische Physik ·江西省农业科学研究院, Christian Bäumer, Erik Engwall, Dirk Geismar, Onwuka Chidi Okorie, Beate Timmermann	2017	42
17	Hyperfractionated Accelerated Chemoradiation With Concurrent Fluorouracil-Mitomycin Is More Effective Than Dose-Escalated Hyperfractionated Accelerated Radiation Therapy Alone in Locally Advanced Head and Neck Cancer: Final Results of the Radiotherapy Cooperative Clinical Trials Group of the German Cancer Society 95-06 Prospective Randomized Trial Journal of Clinical Oncology ·Volker Budach, Martin Stuschke, Wilfried Budach, Michaël Baumann, Dirk Geismar, Gerhard G. Grabenbauer, Soliman M. Kamel, Klaus Jahnke, 戢治强, Thomas Herrmann, Michael Bamberg, Peter Wust, W. Hinkelbein, Klaus‐Dieter Wernecke	2005	211
18	Accelerated hyperfractionated chemoradiation (C-HART) plus 5-FU/MMC is superior to HART for inoperable locally advanced head and neck cancer. Final results of the German ARO 95–06 Multicentre Trial Journal of Clinical Oncology ·Volker Budach, Martin Stuschke, Wilfried Budach, Michaël Baumann, Dirk Geismar, Gerhard G. Grabenbauer, Soliman M. Kamel, Kristoph Jahnke, Peter Wust, K-D Wernecke	2004	3
19	Virtual simulation in patients with breast cancer Radiotherapy and Oncology ·André Buchali, Dirk Geismar, Woo-Jung Song, L. Schlenger, A.N. Kakon, Volker Budach	2001	12
20	Hemoglobin is an independent prognostic factor in locally advanced head & neck cancer - three year results from a german multicentre trial (ARO 95/6) International Journal of Radiation OncologyBiologyPhysics ·Volker Budach, Dirk Geismar, М. Е. Пугачёва, Martin Stuschke, Michaël Baumann, Wilfried Budach, Gerhard G. Grabenbauer, Peter Wust, W. Hinkelbein, Klaus‐Dieter Wernecke	2001	4

About Dirk Geismar

Dirk Geismar is a scholar working on Radiation, Otorhinolaryngology, Pulmonary and Respiratory Medicine, Ophthalmology and Genetics, having authored 25 papers that have together received 493 indexed citations. Recurring topics across this work include Advanced Radiotherapy Techniques (14 papers), Radiation Therapy and Dosimetry (13 papers), Head and Neck Cancer Studies (5 papers), Prostate Cancer Diagnosis and Treatment (4 papers), Glioma Diagnosis and Treatment (4 papers), Ocular Oncology and Treatments (4 papers), Radiopharmaceutical Chemistry and Applications (3 papers) and Radiation Detection and Scintillator Technologies (3 papers). The work is most often cited by research in Otorhinolaryngology (194 citations), Radiation (207 citations), Pulmonary and Respiratory Medicine (314 citations), Radiology, Nuclear Medicine and Imaging (114 citations) and Oncology (95 citations). Dirk Geismar has collaborated with scholars based in Germany, Sweden and United States. Frequent co-authors include Beate Timmermann, Michaël Baumann, Volker Budach, Martin Stuschke, Wilfried Budach, Peter Wust, Klaus‐Dieter Wernecke, Klaus Jahnke, Gerhard G. Grabenbauer and Thomas Herrmann. Their work appears in journals such as Radiotherapy and Oncology, International Journal of Radiation Oncology*Biology*Physics, Journal of Clinical Oncology, Zeitschrift für Medizinische Physik and Medical Physics.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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