Lập kế hoạch xạ trị 3D-CRT và đảm bảo chất lượng (QA) trên máy Cobalt-60 tại Bệnh viện Ung Bướu thành phố Cần Thơ=Radiotherapy planning 3D-CRT and quality assurance on Cobalt-60 machine at Can Tho Oncology Hospital

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Tác giả: Tấn Phúc Dương, Thế Hiển Lý, Thị Nhờ Nguyễn, Quang Khải Trần

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Y học Việt Nam (Tổng hội Y học Việt Nam), 2024

Mô tả vật lý: tr.256-266

Bộ sưu tập: Báo, Tạp chí

ID: 246456

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Photon beam radiotherapy is still a popular method in cancer treatment today. Of which, three-dimensional conformal radiation therapy (3D-CRT) teachnique is widely used in hospitals and radiation center nationwide today. Methods: In this report, we present an overview of the radiotherapy process, specifically 3D-CRT planning using Eclipse software and quality assurance (QA) checking of actual dose measurement on the Cobalt-60 radiotherapy machine using a water phantom compared with dose reference point of the radiotherapy plan, the accuracy of the dose QA is below ± 5%. Results: Evaluation of the pelvic cancer
head and neck cancer showed that the dose to the tumor reached the prescribed dose
organs at risk satisfy the tolerance doses according to guidelines defined RTOG. Quality Assuarance (QA) dose of four patients data showed that the actual dose calculation compared to the dose on the radiotherapy planning system was almost equivalent with an error of about 0-3%. This ensures that the output parameters of Cobalt-60 machine are accurate, avoiding errors that the software system may not detect during operation and clinical practice. Conclusions: In this report, we have studied the overview of the radiotherapy process using 3D-CRT technique
specifically the radiotherapy planning process using Eclipse software at Can Tho Oncology Hospital. The QA dose for radiation fields is considered a powerful tool for QA while operating the treatment planning system.Xạ trị sử dụng chùm tia photon vẫn là một phương pháp phổ biến hiện nay trong điều trị ung thư. Trong đó, kỹ thuật xạ trị ba chiều theo hình dạng khối u (3D-CRT) được sử dụng nhiều tại các bệnh viện và trung tâm xạ trị hiện nay trong cả nước. Đối tượng, phương pháp: Trong báo cáo này, chúng tôi trình bày tổng quan quy trình xạ trị, cụ thể là lập kế hoạch 3D-CRT bằng phần mềm Eclipse và kiểm tra đảm bảo chất lượng (QA) đo liều thực tế trên máy xạ Cobalt-60 bằng phantom nước so với liều điểm tham chiếu của kế hoạch xạ trị, độ chính xác của việc kiểm tra liều dưới ± 5%. Kết quả: Đánh giá trường hợp ung thư vùng chậu và đầu cổ cho thấy liều vào bướu đạt liều chỉ định và cơ quan lành nằm trong giới hạn liều cho phép theo các tiêu chuẩn RTOG. Việc QA liều của 4 trường hợp dữ liệu bệnh nhân cho thấy việc tính toán liều thực tế so với liều trên hệ thống lập kế hoạch xạ trị là gần tương đương nhau với sai số trong khoảng 0-3%. Đảm bảo thông số đầu ra của máy xạ Cobalt-60 chính xác, tránh sai số hệ thống phần mềm có thể không phát hiện trong khi vận hành và thực hành lâm sàng. Kết luận: Trong báo cáo này chúng tôi đã tìm hiểu tổng quan được quy trình xạ trị theo kỹ thuật 3D-CRT và cụ thể là quy trình lập kế hoạch xạ trị trên phần mềm Eclipse tại bệnh viện Ung Bướu Cần Thơ. Việc QA liều xạ cho những trường chiếu được xem như một công cụ mạnh mẽ cho việc kiểm tra QA trong khi vận hành hệ thống lập kế hoạch điều trị.

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