Dosimetry for IMRT

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NNote t th the High Gradients Comparison of Phantom Plan and Verification Film Film Plan Plan Film From Chet Ramsey, Thompson Cancer Survival Center
QA Q of Individual Fields External diode/ion-chamber arrays • MapCheck • PTW Octavius phantom • IBA Matrix Integrated detector systems • EPID portal p dosimetry y
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Dosimetry for IMRT Thomas Rockwell
Page 4 and 5:
Outline • Dosimetry Issues Releva
Page 6 and 7:
Non-Uniform Intensity Changes the E
Page 8 and 9:
Signal (fC) 12000 10000 8000 6000 4
Page 10 and 11:
Outpuut Factorr 0.9 0.8 00.7 0.6 05
Page 12 and 13:
High Uncertainty in Output Factors
Page 14 and 15: Problems with Conventional Output F
Page 16 and 17: Animation of Scanning Path From the
Page 18 and 19: Animation of Scanning Path From the
Page 20 and 21: Dose D Ratio Dosse Impact of Source
Page 22 and 23: No Difference Between Water and Sol
Page 24 and 25: Small Vs. Farmer Chambers A1SL: 0.0
Page 26 and 27: The Same Technique Could Be Applied
Page 28 and 29: Measurements Would Benchmark Source
Page 30 and 31: Audit for TRS 398 Reference Dosimet
Page 32 and 33: IMRT Is About Using Small Fields In
Page 34 and 35: Meeting for the Dosimetry Code of P
Page 38 and 39: Examples of Small and Novel Fields
Page 40 and 41: Calculate Using MC Using method of
Page 42 and 43: Dose Calibration Correction Factor
Page 44 and 45: “Effective kQ” for Tomo 1. Dete
Page 46 and 47: ICRU Committee on IMRT Sponsors •
Page 48 and 49: QA for IMRT • Appropriate QQA of
Page 50 and 51: 1 mm Bands Leaf Positioning Errors
Page 52 and 53: Radiation Field Edge Offset 0.7mm o
Page 54 and 55: Dynamic Multileaf Collimator MLC (D
Page 56 and 57: TomoTherapy py Leaf Latencyy • To
Page 58 and 59: End-to-End QA
Page 60 and 61: Dose (GGy) On and Off-Axis Results
Page 62 and 63: Delivery QA Panel
Page 66 and 67: Independent Calculation
Page 68 and 69: Gamma Function � ( r , r ) �{[
Page 70 and 71: Molineu et al IJROBP 2005 Ibott et
Page 72 and 73: Dm/Dc 1.2 1.15 1.1 1.05 1 0.95 0.9
Page 74 and 75: Frequency Inter-Institution Dose Ac
Page 76 and 77: QA Accuracy y for IMRT • Previous
Page 78 and 79: Monitor Units Calculations for MMod
Page 80 and 81: Monitor Backscatter for Square On O
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Dosimetry for IMRT

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