In an effort to improve practice around using respectful language regarding patients and colleagues, ASTRO Leadership has developed Culture of Respect Guidelines that we ask all presenters to review and adhere to during their presentations at the Annual Meeting and all ASTRO meetings. The language addresses the importance of using professional introductions, correct pronunciations of names and correct use of pronouns, as well as respectful language around patients. The guidelines provide examples of appropriate and inappropriate language that you will find helpful as you prepare your presentation.
Training in the ASTRO Academy – The purpose of the trainings is to help ASTRO speakers organize their presentations, create effective visual design of content and slides and prepare their presentation delivery following recommended best practices and ASTRO guidelines. All faculty and presenters have already been added to the training which takes approximately 60 to 90 minutes total to complete. Each training includes printable quality checklists, the slides and scripts from the narrated presentations and additional resources. Plus, earn CME credit so get started now!
If you are unable to access the faculty training please email the Education department for assistance.
Oral scientific sessions are labeled as “SS 01, SS 02,” and are either 60- or 75-minutes in length. The session will contain either six or seven abstracts depending on the scheduled session time. Each speaker is given seven minutes to present their abstract followed by a three-minute question and answer period, for a total of 10 minutes per abstract.
All abstract presenters must deliver their presentations in person, in Boston. Unfortunately, we cannot accommodate virtual presentations. If you are unable to attend for any reason, please decline your role in the Speaker Center and reach out to the Annual Meeting team for assistance, as needed.
All abstract authors must submit their slides ahead of time. Slides can be submitted virtually through the Speaker Center until Monday, September 21, 2026, at 11:59 p.m. Pacific time. All speakers must also review their slides with ASTRO AV technicians in the Speaker Ready Room once you arrive on site. If you are unable to upload before September 21, at 11:59 p.m. Pacific time, you may upload directly in the Speaker Ready Room. We highly encourage all presenters to upload before the deadline in order to ensure there are no AV concerns during your session and to allow your moderator time to review your slides prior to the session.
If your session has a Discussant, you must submit a second set of summary slides for the Discussant (more information is included below). The Discussant slides are due no later than Friday, July 24, 2026. If you fail to meet this deadline, your abstract will not be included in the Discussant's presentation.
Each session is assigned two moderators to keep time and assist speakers with the question and answer period. Presenters will be able to see their session Moderators in the Speaker Center.
Scientific sessions may also include a Discussant to provide a background to frame the presentations, emphasize the key points or provide an alternative point of view of the presented abstracts. IF your session has been assigned a Discussant to discuss your paper, you will be notified in a subsequent email with instructions to forward three to four summary slides and a take-home message in PowerPoint by Friday, July 24, 2026. Your summary slides will aid the Discussant to prepare their presentation and slides.
Presenters will be able to see their Discussant in the Speaker Center.
Quick Pitch sessions are labeled as “QP 01, QP 02,” and are 60-minutes in length. Each session will include six presenters who have five minutes and five slides to present the highlights of their study and a take-home message. These sessions will include a 20-minute Q&A at the end of the session, with the two moderators and six presenters.
All abstract presenters must deliver their presentations in person, in Boston. Unfortunately, we cannot accommodate virtual presentations. If you are unable to attend for any reason, please decline your role and reach out to ASTRO staff for assistance, as needed.
All Quick Pitch abstract authors must submit their slides ahead of time. Slides can be submitted through the Speaker Center until Monday, September 21, 2026, at 11:59 p.m. Pacific time. All presenters must also review their slides with ASTRO AV technicians in the Speaker Ready Room upon arrival.
Each session is assigned two moderators to assist speakers with the question and answer period. Presenters will be able to see their session moderators in the Speaker Center.
Nearly 1,700 digital posters will be available to view both at the in-person meeting and on the virtual meeting platform. All poster presenters must record an audio narration to be used as your presentation. This will allow both in-person and virtual meeting attendees to view all poster presentations.
Posters will be available for viewing and listening on kiosks in Boston, and through the Annual Meeting Portal and ASTRO website via the Virtual Poster Library. Posters will be available to view throughout the meeting and beyond. Poster Q&A sessions will be scheduled based on disease sites throughout the meeting dates (September 26 – September 30, 2026). During the scheduled Poster Q&A session time, attendees will have the opportunity to ask questions to specific poster presenters. Poster presenters are required to attend the Poster Q&A sessions to answer questions from the audience.
Presentation Deadline and Requirements
All posters MUST be submitted by September 21, 2026. For more details on your poster requirements, including deadlines, fees, etc., please visit the Speaker Center and navigate to the "My presentations" tab. If you are unable to meet the submission deadline, please decline your role in the Speaker Center and withdraw your abstract.
Instructions for the Preparation of your Digital Poster
Am I able to re-upload my poster if I have new edits? Yes, you can re-upload the poster until the final deadline (September 21, 2026). If you have any questions, please contact [email protected]
| Sunday, September 27, 2026 | |
| 3:00 p.m. - 4:00 p.m. | Poster Session 1 |
| 4:00 p.m. - 5:00 p.m. | Poster Session 2 |
| Monday, September 28, 2026 | |
| 10:45 a.m. - 12:00 p.m. | Poster Session 3 |
| 3:00 p.m. - 4:00 p.m. | Poster Session 4 |
| 4:00 p.m. - 5:00 p.m. | Presidential Science Poster Session |
| Tuesday, September, 2026 | |
| 12:30 p.m. - 1:45 p.m. | Poster Session 5 |
| 2:15 p.m. - 3:30 p.m. | Poster Session 6 |
| 3:45 p.m. - 5:00 p.m. | Poster Session 7 |
Abstract presenters are required to pay the registration fee, attend the Annual Meeting and upload their presentation before the deadline. If circumstances prevent you from participating, you must arrange for the abstract to be presented by a co-author and notify ASTRO immediately by declining your role in the Speaker Center. You will have the option to select a co-author to present on your behalf.
To maintain the integrity of the ASTRO abstract review and publication process, no updates to data will be accepted after the submission deadline.
Authors are strongly encouraged to carefully proof all components of their abstract prior to submission, including formatting, spelling, author affiliations, author order, and the presenting author designation. Please also review your confirmation email, as your abstract will be published exactly as submitted. Revisions of any kind may be made until the submission deadline: Tuesday, February 24, 2026.
Post-Submission and Post-Acceptance Changes
In accordance with ASTRO policy, only minor editorial corrections are permitted after an abstract has been accepted. Revisions to the data, content, structure, results, or conclusions of an abstract after the submission deadline are considered substantive and cannot be accommodated. Additionally, new authors may not be added after the submission deadline, as all disclosure acknowledgment statements must be completed at the time of abstract submission.
Requests for Minor Corrections
Requests to correct minor typographical or clerical errors after the submission deadline will be considered on a limited basis and must be submitted by the presenting author to the Annual Meeting team no later than June 28, 2026. Requests submitted by coauthors, industry representatives or medical communication firms will not be accepted.
Final Deadline for Changes
Any correction requests received after June 28, 2026, cannot be incorporated and will NOT be reflected in the official meeting proceedings.
To remain in compliance with the ACCME guidelines, ASTRO must avoid any commercial bias in the scientific and educational programs at the Annual Meeting. Vendor names or names of commercial products or services will be removed from all abstracts, at ASTRO's discretion.
All abstracts to be presented at ASTRO’s Annual Meeting are embargoed until 5:00 pm Eastern time on Friday, September 25, 2026. The embargo policy applies to all abstracts regardless of whether information is obtained from another source.
Embargo violations by abstract authors and/or sponsors may result in removal of the abstract from the scientific program. The submitting author is responsible for conveying this information to all co-authors, and notifying financial and other sponsors about this embargo policy.
All abstracts accepted for presentation at the ASTRO Annual Meeting may be highlighted in ASTRO’s Press Program. All submitters agree to cooperate in the publicity of their study. Questions regarding the embargo or press policy may be directed to ASTRO’s media relations team.
