4D dose calculations at PSI - current status and ongoing work - GSI

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Issues of 3D dose calculation Always dose to water Steep density gradients It does not take into account where a high density area is (more upstream/downstream) -> different scattering effects 4D workshop Dirk Boye, December 10 th
Why 4D dose calculation ? Direction of protons perpendicular to target motion This will lead to huge interplay effects and subsequently to hot and cold spots in dose distribution (worst case: scanning of protons is in phase with organ motion) Different approaches to compensate for interplay effects (tracking, gating, rescanning or combinations) Use which approach? In which case? 4D workshop Dirk Boye, December 10 th
Page 1 and 2: 4D dose calculations at PSI - curre
Page 3 and 4: 1. 4D dose calculation on a deformi
Page 5 and 6: Static 3D dose calculation at PSI F
Page 7: Static 3D dose calculation at PSI 4
Page 11 and 12: Deforming dose grid 4D workshop Dir
Page 13 and 14: Deforming dose grid - inputs Source
Page 15 and 16: 4D dose calculations in homogenouos
Page 17 and 18: 4D dose calculations in homogenouos
Page 21 and 22: Scaled rescanning & deforming dose
Page 23 and 24: Rescanning results 4x rescanning 6x
Page 25 and 26: no rescanning Results 6x rescanning
Page 27 and 28: no rescanning Results 8x rescanning
Page 29 and 30: Proton range variations & target co
Page 35 and 36: 4D dose calculations in heterogeneo
Page 37 and 38: Results 6x rescanning to adapted co
Page 41 and 42: 4DMRI [Siebenthal et. al 2007] - 4D
Page 43 and 44: 4DMRI - principal idea: if navigato
Page 45 and 46: 4DMRI - lung 4D workshop Dirk Boye,
Page 47 and 48: Simulated 4DCT - source of density
Page 49 and 50: Simulated 4DCT Possible advantages
Page 51 and 52: Simulated 4DCT - Axial view 4D work
Page 53 and 54: Simulated 4DCT - next steps - Slidi
Page 55 and 56: Andreas Schaetti 4D workshop Dirk B
Page 57 and 58: Ye Zhang 4D workshop Dirk Boye, Dec
Page 59 and 60:
Beam‘s Eye View (BEV) 4D workshop
Page 61 and 62:
Beam‘s Eye View (BEV) 1 st step:
Page 63:
Thank you for your attention 4D wor
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4D dose calculations at PSI - current status and ongoing work - GSI

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