Hsc 340 10 14
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Hsc 340 10 14

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     Hsc 340 10 14 Hsc 340 10 14 Presentation Transcript

    • HSC 340 10-14-10
      • Photon Dose Distributions
        • Single and multi-field distributions
        • Corrections
        • Tx plan essentials
      • Electron Dose Distributions
        • Physics
        • Characteristics
        • Treatment Planning
    • Photon Dose Distribution
      • What are dose distributions?
        • Pg. 528 PDD
        • Beam Profile
        • Flattening Filter
      • What are isodose distributions?
    • Isodose distributions
      • Open fields
      • Wedged fields
      • Multiple fields
        • POP
        • Wedged pair
    • Corrections
      • Contour/Obliquity
        • P’=P x {SSD+d m /SSD+d m +h} 2
      • Heterogeneity
        • D actual= d 1 +d 2 +d 3
        • d eff= p e d 1 +p e d 2 +p e d 3
      • Table 25-2 and table 25-3
    • Treatment Planning Essentials
      • Rationale for 3-D conformal
        • Overall goal to deliver 100% dose to tumor and deliver 0% to critical structures.
        • Figure 25-12
      • 3-D treatment planning & delivery methods
        • Need CT
        • IMRT & 3D CRT
    • Algorithms
      • Dose calc process
      • Data driven
        • Bentley-Milan (rarely used)
      • Model driven
        • ADAC Pinnacle
      • 2-D vs 3-D
        • Pg. 25-4
    • Algorithms cont.
      • What should an algorithm be evaluated on?
      • Calculation Algorithms
        • Scatter Integration
        • Convolution Algorithm
    • Treatment Planning Concepts
      • Planning volumes
      • Read Box 25-2 on your own.
      • Prescriptions are often based on iso lines
      • DVH
    • Treatment Planning Process
      • Image
      • Contour
      • Delineate Treatment Fields
      • Evaluate and Implement
    • Electron dose distributions
      • Interactions are different from photon beam
      • Collisional and Radiation Interactions
      • Energy Dependence
      • Dependence of depth
      • Production of Clinically useful e-
      • Scattering foils vs. scanning beams
    • Characteristics of e- beams
      • Dose gradients of clinically useful e- beams
      • Shapes
    • Treatment Planning
      • Rules of thumb
      • Surface characteristics
      • Build-up region characteristics
      • Energy dependence
      • Distance correction factors
      • Effective point source
      • Virtual source
    • Irregular fields and e- beams
      • Shielding
      • Internal shielding
      • Effects on dose
      • Tissue heterogeneity and dose
      • Gaps
      • Read Clinical Cases pg.559