ESTRO 2021 Abstract Book

S1197

ESTRO 2021

(QUALIty assurance For IntervEntional Radiotherapy) project.

Materials and Methods We started a monoinstitutional multidisciplinary discussion to evaluate current processes and documents in managing, treatment planning, and delivery of endovaginal interventional radiotherapy to identify critical points and propose practical solutions for a resource-saving but a high-quality procedure. We interviewed three radiation oncologists with IRT experience, one medical physicist (expert in IRT), and one radiotherapy technologist with IRT experience. Then we performed a literature research on this topic. According to the interview and research results, shared documentation was proposed and presented to the multidisciplinary interventional oncology tumor board (IOC-GYN MDTB). Each member of the board reviewed the proposal and, after discussing some issues, validated the document. Finally, a multicentric committee approved all forms and documentation. Results We summarized the complete patient pathway within the Interventional Oncology Center (IOC) in a dedicated document. Critical points were defined and highlighted. As a next step, we planned to introduce it as an internal recommendation to allow standardized treatment documentation and establish a prospective internal quality assurance protocol. IOC-GYN MDTB members and multicenter committee approved the recommended documentation, including an information brochure for patients, a dedicated prescription module with an obligatory procedural checklist, a medical physicist checklist for treatment planning and delivery, a quality check to confirm the summary information of the approved plan, as well as the follow-up indication with the standard supportive therapy. In particular, for endovaginal interventional radiotherapy, four critical points were identified (fig. 1): i) the first clinical evaluation, including indication and prescription; ii) the interventional board, which independently checked the clinical appropriateness of indication and prescription; iii) outpatient procedure, target definition, and planning; iv) follow-up indication. An example of the documentation produced for quality assurance is shown in fig. 2. Figure 1 – Patients workflow

Figure 2 – Example of quality assurance documentation

Conclusion We defined a prospective institutional multidisciplinary quality assurance protocol for endovaginal interventional radiotherapy, introduced the prospective program and the quality assurance documentation.

PO-1460 Adaptive re-planning with image guided pencil beam scanning proton beam therapy S. Chilukuri 1 , U. Gaikwad 2 , S. Nangia 2 , K. Patro 3 , R. Thiagarajan 3 , N. Mp 3 , S. Sunder 2 , N. Burela 2 , R. Thimma 2 , P. Panda 2 , R. Jalali 2