Publications

Real-Time Ultrasound and Electromagnetic
 Transmitter Based Tracking Systems for Adaptive
 Radiotherapy in Prostate Cancer Patients

M.C. Biston1,2, L. Delcoudert1, C. Gorsse1, A. Munoz1, P. Pommier1
1Centre Leon Berard, Lyon, France
2Universite ́ de Lyon, CREATIS; CNRS UMR5220; Inserm U1044; INSA-Lyon Universite ́ 1, Lyon Cedex 08, France
Oral presentation, Abstract, Electronic Poster, ASTRO 2017, San Diego, USA
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The effect of rectal retractor on intrafraction motion of the prostate (Publication)

A. Vanhanen1,2, M. Kapanen1,2
1Department of Oncology, Unit of Radiotherapy, Tampere University Hospital, PO Box 2000, FI-33521 Tampere, Finland
2Department of Medical Physics, Medical Imaging Center, Tampere University Hospital, PO Box 2000, FI-33521 Tampere, Finland
Publication in Biomed. Phys. Eng. Express 2 (2016) 035021
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The effect of rectal retractor on intrafraction motion of the prostate (Poster)

A. Vanhanen1,2, M. Kapanen1,2
1Department of Oncology, Unit of Radiotherapy, Tampere University Hospital, POB-2000, 33521 Tampere, Finland
2Department of Medical Physics, Medical Imaging Center, Tampere University Hospital, POB-2000, 33521 Tampere, Finland
Poster with abstract, ESTRO 35, 2016, Turin, Italy
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Intrafraction motion assessment in SBRT for prostate cancer: a prospective study

Alessandro Vai1, Alessio Pierelli1, Federica Locatelli1, Vittorio Vavassori2, Elisa Della Bosca2, Andrea Ravasio2, Micaela Motta2 , Viviana Manazzale2, Paolo Salmoiraghi1
1Medical Physics Department, Humanitas Gavazzeni, Bergamo, Italy
2Radiotherapy Department, Humanitas Gavazzeni, Bergamo, Italy
Poster with abstract, Italian SBRT kongress at University of Milan, October 2014
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Echtzeituntersuchung der intrafraktionellen Prostatamobilität bei der definitiven perkutanen Strahlentherapie mittels eines implantierbaren Radiotransmitters unter Verwendung eines endorektalen Ballons.

Lewitzki V. 1, Kühn A. 2, Gocke C. 1, Syren H. 3, Knauerhase H. 1, Hildebrandt G. 1
1Klinik und Poliklinik für Strahlentherapie, Universitätsmedizin Rostock
2Medizinische Fakultät, Universität Rostock
3Micropos Medical AB
Poster with abstract, DEGRO 2014, Düsseldorf
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Prostrate intrafraction motion assessment using a temporary-implanted wired electromagnetic tracking system

Alessandro Vai1, Alessio Pierelli1, Federica Locatelli1, Vittorio Vavassori2, Elisa Della Bosca2, Andrea Ravasio2, Micaela Motta2, Viviana Manazzale2, Paolo Salmoiraghi1
1Medical Physics Department, Humanitas Gavazzeni, Bergamo, Italy
2Radiotherapy Department, Humanitas Gavazzeni, Bergamo, Italy
Poster with abstract, ESTRO 33, 2014, Vienna, Austria

Real-time dose reconstruction during volumetric modulated arc therapy with dynamic MLC tracking

ESTRO-Jack Fowler University of Wisconsin Award
At ESTRO 33 (2014) in Vienna, Thomas Ravkilde was awarded for the work on MLC tracking that has been performed in cooperation with Ass. Prof. Per Rugaard Poulsen at the Aarhus University Hospital in Denmark and Prof. Paul Keall at the Radiation Physics Laboratory, Sydney, Australia.
Click here to watch MLC tracking performed at the Aarhus University hospital on the RayPIlot® system and a Varian RapidArc® Clinac

Real-time intrafraction target motion evaluation in prostate cancer radiotherapy using a temporary-implanted wired electromagnetic transmitter: influence on treatment margin

Alessandro Vai1, Alessio Pierelli1, Federica Locatelli1, Vittorio Vavassori2, Elisa Della Bosca2, Andrea Ravasio2, Micaela Motta2, Viviana Manazzale2, Paolo Salmoiraghi1
1Medical Physics Department, Humanitas Gavazzeni, Bergamo, Italy
2Radiotherapy Department, Humanitas Gavazzeni, Bergamo, Italy
Poster with abstract, The 8th National Congress, AIFM 2013, Torino, Italy
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Experimentally validated simulator of dynamic MLC tracking treatments: A tool for tracking QA.

Poulsen PR1, Ravkilde T1, O’Brien RT2, Keall PJ2
1Aarhus University Hospital, Aarhus, Denmark
2The University of Sydney, Sydney, Australia
Oral presentation with abstract, Int J Rad Onc Biol Phys 2013: 87, Suppl, S45. (ASTRO 55th Annual Meeting, Atlanta, Sept. 2013).
http://www.redjournal.org/article/S0360-3016(13)00789-X/fulltext

Time-resolved measurements and reconstruction of delivered target dose in VMAT treatments with and without dynamic MLC tracking: predicting treatment delivery success.

Ravkilde T1,2, Keall PJ3, Grau C1,2, Høyer M1,2, Poulsen PR1,2
1Department of Oncology, Aarhus University Hospital, Aarhus, Denmark
2Institute of Clinical Medicine, Aarhus University, Aarhus, Denmark
3Radiation Physics Laboratory, University of Sydney, Sydney, Australia
Oral presentation with abstract, BiGART2013

Time-resolved dose distributions to moving targets during volumetric modulated arc therapy with and without dynamic MLC tracking.

Ravkilde T1,2, Keall PJ3, Grau C1,2, Høyer M1,2, Poulsen PR1,2
1Department of Oncology, Aarhus University Hospital, Aarhus, Denmark
2Institute of Clinical Medicine, Aarhus University, Aarhus, Denmark
3Radiation Physics Laboratory, University of Sydney, Sydney, Australia
Article, Medical Physics 2013: 40; 111723-1-6
http://scitation.aip.org/content/aapm/journal/medphys/40/11/10.1118/1.4826161

Time-resolved dose reconstruction by motion encoding of volumetric modulated arc therapy fields delivered with and without dynamic multi-leaf collimator tracking.

Ravkilde T1,2, Keall PJ3, Grau C1,2, Høyer M1,2, Poulsen PR1,2
1Department of Oncology, Aarhus University Hospital, Aarhus, Denmark
2Institute of Clinical Medicine, Aarhus University, Aarhus, Denmark
3Radiation Physics Laboratory, University of Sydney, Sydney, Australia
Article, Acta Oncologica 2013: 52; 1497-1503
http://www.ncbi.nlm.nih.gov/pubmed/23984811

Dosimetric verification of complex radiotherapy with a 3D optically based dosimetry system: Dose painting and target tracking.

Skyt PS, Petersen JBB, Yates ES, Poulsen PR, Ravkilde TL, Balling P, Muren LP.
Department of Medical Physics, Aarhus University/Aarhus University Hospital, Aarhus, Denmark
Article, Acta Oncologica 2013: 52; 1445-1450
http://www.ncbi.nlm.nih.gov/pubmed/23957684

Verification of dose painting and target tracking with a 3D dosimetry system.

P. Skyt1, J.B.B. Petersen1, E.S. Yates1,P.R. Poulsen2, T. Ravkilde2, P. Balling3, L.P. Muren1
1Aarhus University Hospital, Dept. of Medical Physics, Aarhus, Denmark

2Aarhus University Hospital, Dept. of Oncology, Aarhus, Denmark
3Aarhus University, Dept. of Physics and Astronomy, Aarhus, Denmark
Poster with abstract, Radiother Oncol 2013: 106, Suppl 2, S88. (2nd ESTRO Forum, Geneva, May. 2013).

Time-resolved dose reconstruction of VMAT delivery to moving targets with and without dynamic MLC tracking.

T. Ravkilde1, P.J. Keall2, C. Grau1, M. Høyer1, P.R. Poulsen1
1Aarhus University Hospital, Department of Oncology, Aarhus, Denmark
2University of Sydney, Sydney Medical School, Sydney, Australia
Poster with abstract, Radiotherapy and Oncology 2013: 106, Suppl 2, S15-6. (2nd ESTRO Forum, Geneva, May. 2013).

RayPilot – electromagnetic real-time positioning in radiotherapy of prostate cancer – initial clinical results

E Castellanos1, M-H Eriksson1, B Sorcini1, U Green2, B. Sten Nilsson1, B Lennernäs3
1Karolinska University Hospital, Radiumhemmet, Stockholm, Sweden
2Uddevalla Hospital, Dept of Med Tech, Uddevalla, Sweden
3Sahlgrenska University Hospital, University of Gothenburg, Sweden
Poster, ESTRO 31, 9-13 May 2012, Barcelona, Spain, EP-1122

Patient evaluation of the RayPilot system during radiation therapy of prostate cancer

Kerstin Lidén, Pia Damsgaard Jensen, Åsa Erstorp, Berit Johansson, Lena Mourou, Beata Psilander
Karolinska University Hospital, Radiumhemmet, Stockholm, Sweden
Poster, ESTRO 31, 9-13 May 2012, Barcelona, Spain, EP-1112

Clinical experience of real-time tracking with the RayPilot system in patients with prostate cancer

Ulrika Lindencrona1, Karin Braide2, Hanna Syrén3, Sven Hertzman1, Jon Kindblom2
1Dept. of Therapeutic Radiation Physics, Sahlgrenska University Hospital, Gothenburg, Sweden
2Dept. of Oncology, Sahlgrenska University Hospital, Gothenburg, Sweden
3Micropos Medical, Gothenburg, Sweden
Poster, ESTRO 31, 9-13 May 2012, Barcelona, Spain, EP-1399

3D dosimetry with gels and optical tomography of dynamic MLC tracking based on an electromagnetic transponder system

P S Skyt1,2,3,4,P R Poulsen2, T S Kinnari3, I Wahlstedt3, T Ravkilde2, P J Keall5, J B B Petersen1, P Balling3 and L P Muren1,2,4
1Dept of Medical Physics, Aarhus University Hospital, Denmark
2Dept of Oncology, Aarhus University Hospital, Denmark
3Dept of Physics and Astronomy, Aarhus University, Denmark
4Dept of Clinical Medicine, Aarhus University, Denmark
Poster with abstract, ESTRO 31, 9-13 May 2012, Barcelona, Spain, PO-0883

Time resolved evolvement of target dose distribution during IMAT with and without dynamic MLC tracking

T. Ravkilde1, P.J. Keall2, C. Grau1, M. Høyer1, P.R. Poulsen1
1Aarhus University Hospital, Department of Oncology, Aarhus C, Denmark
2The University of Sydney, Sydney Medical School, Sydney, Australia
Poster with abstract, ESTRO 31, 9-13 May 2012, Barcelona, Spain, PD-0343
AWARDED: ESTRO BEST YOUNG PHYSICS POSTER

Geometric accuracy of dynamic MLC tracking with an implantable wired electromagnetic transponder

THOMAS RAVKILDE1, PAUL J. KEALL2,3 KLAUS HØJBJERRE1, WALTHER FLEDELIUS1, ESBEN WORM1 & PER R. POULSEN1,4
1Department of Oncology, Aarhus University Hospital, Denmark
2Central Clinical School, University of Sydney, Australia
3Department of Radiation Oncology, Stanford University, CA, USA
4Institute of Clinical Medicine, Aarhus University, Denmark
Article, Acta Oncologica, 2011; 50: 944–951

Four and five dimensional radiotherapy with reference to prostate cancer – definitions, state of the art and further directions – an overview

BO LENNERNÄS1, ENRIQUE CASTELLANOS2, STEN NILSSON2 & SEYMOUR LEVITT2
1Department of Oncology, Sahlgrenska Hospital and Academy, University of Gothenburg, Gothenburg, Sweden
2Department of Oncology/Pathology, Karolinska University Hospital and Institutet, Stockholm, Sweden
Article, Acta Oncologica, 2011; 50(Suppl 1): 104–110

Electromagnetic Modeling and Design of Medical Implants and Devices

OSKAR TALCOTH, Chalmers University of Technology, Dept. of Signals and Systems, Gothenburg, Sweden
Licentiate thesis, series R, ISSN 1403-266x, Chalmers University of Technology, Gothenburg, Sweden, 2011

Erste Erfarungen mit dem RayPilot® (Micropos) an der Klinik für Strahlenterapie (Univ. Rostock)

Not reviewed summary of the Rostock University Clinics first experience ot the RayPilot® system Professor G. Hildebrand et al, Rostock University Clinic
Medizinische Physik 2011 - 3 Ländertagung der ÖGMP, DGMP und SGSMP, Wien 28/9-1/10, 2011

3D Dosimetry with Gels and Optical Tomography of Dynamic MLC Tracking Based on an Electromagnetic Transponder System

P Skyt1, P Poulsen1, T Kinnari2, I Wahlstedt2, T Ravkilde1, P Keall3, J Petersen1, P Balling2, and L Muren1
1Aarhus University Hospital, Aarhus, Denmark
2Aarhus University, Aarhus, Denmark
3University of Sydney, Camperdown, Australia
Abstract and Oral Presentation, SU‐C‐224‐01 2011 Joint AAPM/COMP Meeting, July 31 - August 4, Vancouver, Canada

Geometric accuracy of Dynamic MLC tracking with an implantable wired electromagnetic transponder

T. Ravkilde1, P. J. Keall2,3, K. Hoejbjerre1, W. Fledelius1, E. Worm1, P. R. Poulsen1
1AARHUS UNIVERSITY HOSPITAL, Department of Oncology, Aarhus C, Denmark
2UNIVERSITY OF SYDNEY, Sydney Medical School, Sydney, Australia
3STANFORD UNIVERSITY, Department of Radiation Oncology, Stanford, USA
Abstract and Oral Presentation, 251, Tuesday May 10, 2011 ESTRO Anniversary Congress, 8 - 12 May 2011
Excel Centre, London, United Kingdom

Electromagnetic positioning, real time positioning and four-dimensional radiotherapy using the Raypilot system. First human experience.

Bo Lennernäs* 1, Enrique Castellanos 2, Sten Nilsson 2
1Institutionen särskilda specialiteter, Göteborgs Universitet, Göteborg
2Radiumhemmet, Karolinska Institutet, Stockholm
Poster, RT-Poster-18 The NACP and ACTA Oncologica Symposiums 2011, Uppsala, Sweden

Geometric accuracy of DMLC tracking with an implantable wired electromagnetic transponder.

Thomas Ravkilde1, Paul J Keall2,3, Klaus Højbjerre1, Walther Fledelius1, Esben Worm1, Per R Poulsen1
1Department of Oncology, Aarhus University Hospital, Aarhus, Denmark
2Sydney Medical School, The University of Sydney, Australia
3Department of Radiation Oncology, Stanford University, Stanford, CA, USA
Abstract and Oral Presentation, RT-19 The NACP and ACTA Oncologica Symposiums 2011, Uppsala, Sweden

Fyrdimensionell radioterapi med elektromagnetisk positionering - en metodbeskrivning och exempel vid lokaliserad prostatacancer

Bo Lennernäs 1, Enrique Castellanos2, Sten Nilsson2
1Institutionen för särskilda specialiteter, Göteborgs Universitet, Göteborg
2Radiumhemmet, Karolinska Institutet, Stockholm
Poster Läkarstämman 2010, Annual general meeting of the Swedish Society of Medicine, Gothenburg, Sweden

Evaluation of the localization accuracy and precision of the RayPilot® system compared to Cone-Beam CT

Sundqvist E.a, Robbestad W.a, Borgen L.a, Castro A.a, Halnes E.a, Bergstrand E.S.b, a Oslo University College, b Department of Medical Physics, Division for Cancer Medicine and Radiotherapy, Radiumhospital, Oslo University Hospital, Norway
Poster, 1694 ESTRO 29, 12-16 September 2010, Barcelona, Spain

How accurate could the RayPilot® system detect real time motion of the chest during breast radiotherapy?

Sundqvist E., Tran T., Ormestad U., Linh Y.T., Aakervik E., Oslo University College, Norway
Poster, College Of Radiographers Annual Radiotherapy Weekend 2010, Birmingham, United Kingdom
Download Poster as PDF

Evaluation of the localization accuracy and precision of the RayPilot® system compared to Cone-Beam CT

Sundqvist E.a, Robbestad W.a, Borgen L.a, Castro A.a, Halnes E.a, Bergstrand E.S.b, a Oslo University College, b Department of Medical Physics, Division for Cancer Medicine and Radiotherapy, Radiumhospital, Oslo University Hospital, Norway
Poster, College Of Radiographers Annual Radiotherapy Weekend 2010, Birmingham, United Kingdom

A new multi-functional implant for 4DRT, including positioning, dose measurement and patient identification.

B Lennernäs M.D. Ph.D.1,R Iustin MSc.2, J Linder MSc.2, H Syrén MSc.2, K Westerlund MSc.3
1Sahlgrenska University Hospital, University of Gothenburg, Sweden
2Micropos Medical AB (publ), Gotenburg, Sweden
3AB Mimator, Uppsala, Sweden
Poster B-350, ASTRO 51, Chicago

Evaluation of positioning accuracy of the electromagnetic RayPilot® system 
with an in vivo dosimeter.

B Lennernäs M.D. Ph.D.1,R Iustin MSc.2, J Linder MSc.2, H Syrén MSc.2
1Sahlgrenska University Hospital, University of Gothenburg, Sweden
2Micropos Medical AB (publ), Gothenburg, Sweden
Poster P400, 10th Biennial ESTRO meeting on physics and Radiation Technology for Clinical Radiotherapy, August 30 - September 3, 2009, Maastricht, Netherlands

Experiences from testing a radiotherapy support system with QuickCheck

Aiko Fallas Yamashita1, Andreas Bergqvist2, and Thomas Arts2
1Simula Research Laboratory, Norway
2IT University of Gothenburg, Sweden
Abstract and Oral presentation, Second International Conference TAP 2008, 
Prato, Italy, April 2008

High precision transponder localization using a novel electromagnetic positioning system in patients with localized prostate cancer

Jon Kindblom1,*, Ann-Marie Ekelund-Olvenmark1, Hanna Syren2, Roman Iustin2, Karin Braide1, Ingela Frank-Lissbrant1, Bo Lennernäs1
1Department of Oncology, Sahlgrenska University Hospital, Gothenburg, Sweden
2Micropos Medical AB, Gothenburg, Sweden
Article, Radiotherapy and Oncology 2009 Mar;90(3):307-11. Epub 2008 Oct 24, "The Green Journal"

Technical description of the next generation electromagnetic position device for 4D radiotherapy.

B. Lennernäs 1, S. Nilsson 2, S. Levitt 2, B. Rosengren3, J. Linder3, H. Syrén3, R. Iustin3
1Dept. of Oncology, Gothenburg University
2Radiumhemmet, Karolinska Institute, Stockholm, Sweden
3Micropos Medical, Sweden
Poster P1075, ESTRO27, September 14 – 18, 2008 Gothenburg, Sweden

Stochastic Pattern of Motion In the Prostate

Jon Kindblom M.D. Ph.D.1, Hanna Syrén MSc.2, Roman Iustin MSc.2, Bo Lennernäs M.D. Ph.D.1
1Dept. of Oncology, Gothenburg University, Sweden
2Micropos Medical, Sweden
Poster P1077, ESTRO27, September 14 – 18, 2008 Gothenburg, Sweden

Target localization using a novel electromagnetic high precision positioning system in patients with localized prostate cancer

Jon Kindblom M.D. Ph.D.1, Ann-Marie Ekelund-Olvenmark M.D.1, Hanna Syrén MSc.2, Roman Iustin MSc.2, Bo Lennernäs M.D. Ph.D.1
1Dept. of Oncology, Gothenburg University, Sweden
2Micropos Medical, Sweden
Poster P399, 9th Biennial ESTRO meeting on physics and Radiation Technology for Clinical Radiotherapy, September 8-13, 2007 Barcelona, Spain

A new implant for automatic high precision real time patient positioning in radiotherapy (RT): a technical description of a GPS system for RT and on its initial test on a phantom and in man

B. Lennernäs1, R. Iustin2, P. Albertsson1, T. Gustafsson2, S.Nilsson3, S. Lewitt3, B. Rosengren2
1Sahlgrenska University Hospital, Univ. of Gothenburg Department of Oncology, Gothenburgs Sweden
2Micropos Medical AB, Chalmers Innovation, Chalmers Univ. of Technology, Gothenburg, Sweden
3University of Stockholm, Radiumhemmet, Stockholm, Sweden
Abstract and Oral Presentation, Wednesday September 28, 2005 ,Proffered Papers Novel technologies, 233, 8th Biennial ESTRO meeting on physics and Radiation Technology for Clinical Radiotherapy, 2005, Lisbon, Portugal

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