1 / 15

Multi-Institutional Study for IMRT Dose Quality Assurance in Korea

Multi-Institutional Study for IMRT Dose Quality Assurance in Korea. Sung- Joon Ye , Jung-in Kim and IlHan Kim sye@snu.ac.kr. Radiation Oncology/Physics Seoul National University College of Medicine Seoul, KOREA. Background. Increasing role of radiotherapy on cancer management

emery
Download Presentation

Multi-Institutional Study for IMRT Dose Quality Assurance in Korea

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Multi-Institutional Study for IMRT Dose Quality Assurance in Korea Sung-Joon Ye, Jung-in Kim and IlHan Kim sye@snu.ac.kr Radiation Oncology/Physics Seoul National University College of Medicine Seoul, KOREA

  2. Background • Increasing role of radiotherapy on cancer management • RT combined with emerging technologies; IMRT, SBRT, SRS, Proton/Carbon RT • In Korea, 40% of cancer patients under RT • Increasing chance of irreparable damage • 2005US NYC St. Vincent’s Hosp.: IMRT 7 times overdose> death • 2006UK Glasgow Beatson Cancer Center: 3DCRT 65% overdose > death • 2005-6US Florida Moffitt Center: SRS 50% overdose > not release yet or ?? Howabout the underdose? > not control tumors

  3. Examples of RT Accidents

  4. Efforts for IMRT Quality Assurance IAEA, AAPM, ASTRO, ESTRO

  5. What’s happening in Korea Korea is an early-user of advanced RT technologies but, how about the infra of RT quality assurance & safety • Daily No. of patients per RT machine: 30-35 in US vs. 40-60 in Korea • No. of physicists per RT machine: 1.0 in US vs. 0.4 in Korea • In July 2011, Governmental approval of IMRT reimbursement for health insurance programs

  6. Purpose • Strengthen the National Infrastructure for RT QA & Medical Radiation Safety • Special emphasis on IMRT QA • Disseminate a basic protocol & guideline of IMRT Dose QA (DQA) via multi-institutional study • Derive the national tolerance (confidential limit) & action levels for IMRT commissioning

  7. Multi-Institutional Study

  8. Korean MOCK Structures* • Head & Neck target • Multi-target • Prostate target • C shape target PTV 3.5 cm 4 cm Bladder H&N PTV 2.5 cm 2 cm RT parotid LT parotid Superior Target 4.2 cm 25 Gy (50%) Prostate (CTV) Core 4 cm Central Target RT Femur LT Femur Prescription dose : 50 Gy 2 cm diameter 4.2 cm 0.5 cm Cord PTV Rectum Inferior Target 4.2 cm 12.5 Gy (25%) *based on AAPM TG 119

  9. DQA for Absolute Point Dose

  10. DQA for 2D Dose Distributions RTP Film

  11. Results: Output Auditing

  12. Results *3%/3mm gamma criteria

  13. Discussion & Conclusions • Application • Below the tolerance level: suitable for high quality RT • Exceed the action level: appropriate action should be taken ASAP • Between the tolerance & action levels: depending on further investigation • LINAC & TOMO groups have similar levels but TOMO has a bit tighter in low dose point • The results of Korea Multi-institutional study are comparable to AAPM/ESTRO guidelines

  14. Symposium on Medical Physicists’ Role for Quality Assurance & Radiation Safety October 29, 2009

  15. Thank You ! Enjoy IRPA13

More Related