PTCOG 61 Spanish Workshop – Additional Spaces Now Available

Due to popular demand, we have been able to change the room for the PTCOG 61 Spanish Workshop, to allow for additional live participants. This is to be held on Saturday 10 June 2023 from 3 pm. Please note that this session is designed for Spanish speaking delegates working or interested in Particle Therapy. To review the program and speakers see our interactive program HERE.

For those living in Spanish speaking locations outside of Madrid or Spain, we would like to highlight once again that a virtual attendance for this workshop only, will be available and can be selected via registration.

Register for the Spanish Workshop and PTCOG 61 HERE

Official PTCOG 61 Hotels – Exclusive Rates Available for PTCOG Attendees

Be sure to take advantage of the lowest available rates at the best located hotels for PTCOG 61. For full details and reservation options visit our accommodation page here. Note the ‘Preferential Code’ PTCOG must be used to access exclusive rates, see details and ‘How to Book Official PTCOG 61 Hotels.

Also note that the PTCOG 61 Conference Venue, whilst a fast and direct connection to the Adolfo Suárez Madrid–Barajas airport, is not in the Madrid city centre. Transferring from the city centre to the IFEMA Metro station (Feria de Madrid) can take between 30 to 45 minutes depending on your chosen location. We advise attendees not booking at an Official PTCOG 61 Hotel to check transfer options to IFEMA North Conference Hall via Feria de Madrid Metro station. Alternatively, taxis can drop off directly to the IFEMA North Convention Centre entrance. Those staying at one of the Official PTCOG 61 Hotels can walk to the venue within 10-15 minutes. The Educational Sessions Welcome Reception will also be held at the Novotel Madrid Campo de las Naciones.

PTCOG 61 Regular Registration Deadline – 10 May 2023

Take advantage of reduced registration fees up to the end of 10 May 2023. Be sure to review registration options and guidelines before completing your registration.

PTCOG 61 Program at a Glance Now Available

Following a successful program meeting in Madrid, the Scientific Program Sub-Committee and Local Hosts have finalised the PTCOG 61 Scientific Program, pending confirmation from abstract authors from notifications sent. Review the PTCOG 61 Program at a Glance here and plan your PTCOG 61 week. The Educational Sessions are also included. The final program will be released prior to the Early Bird registration, mid-March 2023.

PTCOG 61 Notifications Sent

We trust that you have now all received notifications sent to abstract authors. Following a record abstract submission for PTCOG 61, we are excited to see a highly comprehensive program coming together which will also see a first with 3 full days for the PTCOG 61 Scientific Meeting.
All authors should register by the end of 9 March 2023 to ensure your place within the PTCOG 61 Program – Register via the Conference Portal above.
If by chance you feel you have not received your abstract notification, please be sure to check your spam folder. Alternatively, you can log into the PTCOG 61 Conference Portal above and review all important emails sent you by the PTCOG 61 Conference Secretariat from the Communication Log.

PTCOG 61 Abstract Submission Extension – 17 January 2023

On behalf of the PTCOG Scientific Program Sub-Committee and the PTCOG 61 Secretariat, we would like to thank all those who have already submitted abstracts for PTCOG 61. We are excited to see a healthy mix of abstracts across the topics available and look forward to creating the final program.

Due to the large number of requests for additional time to submit abstracts we will now accept abstracts up to the end of the global day on Tuesday 17 January 2023. Please note that this will be the absolute final deadline and no further extension will be possible after this date. We welcome all new abstracts for PTCOG 61 and look forward to seeing you in Madrid.

Abstract Submission Guidelines

PTCOG 61 Invitation Letter

Dear Colleagues,

On behalf of the PTCOG Executive Committee and of the Local Organizing Committee, we are pleased to invite you to Madrid for the 61st edition of the annual PTCOG meeting. Madrid, the capital and most populous city of Spain, will astound you with its history, architecture, and local attractions. The meeting is co-organized by the two proton therapy centers in Madrid, while Spain is about to build 10 more centers to become the leading European country in proton therapy. A perfect time to hold the particle therapy meeting in Spain!

The conference this year will start with an educational session in Spanish language, followed by two days of education program in English language and 3 days of multi-session scientific reports with several subcommittee meetings in between. The conference theme is “Integrative Particle Therapy and Complementary Care“ reflecting the importance of integrating particle therapy into comprehensive cancer care. We expect an outstanding scientific program covering clinics, physics, and biology topics, many plenary talks and round tables for debating hot issues in particle therapy.

These days we are experience an inflection point in particle therapy. The number of centers is rapidly increasing all over the world, and over the past year we saw a lot of convincing evidence from clinical trials on the benefit of charged particle therapy. PTCOG is also rapidly growing, reaching now over 4,000 members and nearly 100 facility representatives in the Steering Committee. The Steering Committee elected new members of the Executive Committee during the PTCOG 60 meeting in 2021, and this will be the first meeting for the new PTCOG chair and vice-chairs, as well as for the new chairs of the Educational Sub-Committee. We hope that in Madrid all of you will participate in one of our 14 active Sub-Committees. We will also discuss PTCOG funding for small research projects and the future of the PTCOG Scientific journal, the International Journal of Particle Therapy. The Steering Committee will also be called to elect new members of the Executive Committee and to decide the site of the 2026 PTCOG annual meeting.

We look forward to your participation and spending time with you in Madrid. We are sure that this will be an awesome scientific experience and we also hope you will enjoy the local flavor and hospitality.

Welcome to PTCOG 61!

Marco Durante

PTCOG President

Alejandro Mazal


Martin Jermann

PTCOG Secretary

Felipe Calvo Manuel

Clinica Universidad de Navarra

PTCOG 61 Abstract Topics for Submission

Be part of the PTCOG 61 Official Scientific Program and have the opportunity to present your work live in Madrid. We invite research based on the below confirmed PTCOG 61 Abstract Topics, start your research now. We would also like to highlight updates to abstract topics compared to previous PTCOG conferences, particular within the set up of clinics topics. PTCOG 61 Abstract Submission will be available shortly and launched within November 2022.


Clinics (11 Topics)

  • Challenging clinical scenario: Why or why not particle therapy
  • Comparative effectiveness and cost-effectives analysis
  • General clinical results and patient reported outcome
  • Particle therapy-based re-irradiation
  • Particle therapy -based stereotactic radiotherapy and hypo-fractionated radiotherapy
  • Combined particle therapy with novel systemic therapy: efficacy and toxicities
  • Long-term complications and image changes after particle therapy
  • Complementary therapy in particle therapy (rehabilitation)
  • Novel treatment strategies using particle therapy
  • Clinical implementation of adaptive particle therapy
  • LET and variable RBE based particle therapy

Physics: (8 Topics):

  • Beam delivery and nozzle design
  • Quality Assurance.
  • Absolute and relative dosimetry
  • Treatment planning
  • Dose calculation and optimization
  • Image guidance
  • Adaptive and 4D therapy
  • FLASH and mini-beams – Planning, delivery, and dosimetry

Biology: (8 Topics)

  • iCPRT (immuno charged particle radiotherapy) – what progress has been made?
  • Targeted agents with CPRT
  • Biomarkers of CPRT response
  • Biological advantages for CPRT vs XRT
  • Mathematical Modeling and simulations of CPRT
  • Integrating biology in treatment planning – RBE and beyond
  • BNCT
  • FLASH and mini-beams

We look forward to seeing you in Madrid








PTCOG 61 Partners