rapidarc powerpoint presentation
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RapidArc™
radiotherapy technologyVasthi Wilson, MD, MScNew Jersey Health NetworkEgg Harbor Township, NJ
The Evolution of Arc Therapy
Unshaped Arcs
I M P R O V I N G P R E C I S I O N A N D S P E E D
19651965RapidArc™
radiotherapy technology
2008200820002000Dynamic Conformal Arcs
20032003Slice Based Arcs
RapidArc Single Arc IMRT
RapidArc Objectives• Dose conformity • Tissue sparing
• Plan complexity• Treatment time• Risk of secondary
cancer
RapidArc Dose Conformity - Prostate
RapidArcSingle arc IMRT
Conventional5-field IMRT 719 MU589 MU
RapidArcSingle arc IMRT
Conventional5-field IMRT 719 MU589 MU
RapidArc Dose Conformity - Prostate
RapidArc (solid) IMRT (dashed)PTV
BladderRectum
RapidArc Dose Conformity - Prostate
RapidArc Dose Conformity - Spine
RapidArcSingle arc IMRT
SBRT11-field IMRT 3072 MU2174 MU
VARIAN Medical
Systems
RapidArc Dose Conformity - Spine
RapidArcSingle arc IMRT
SBRT11-field IMRT 3072 MU2174 MU
RapidArc Dose Conformity - SpineRapidArc (solid) IMRT (dashed)
PTV
Spinal Cord
Lungs
• Dose conformity • Tissue sparing
• Plan complexity• Treatment time• Risk of secondary
cancer
RapidArc Objectives
RapidArc Tissue Sparing – H&N
RapidArcSingle arc IMRT
Conventional7-field IMRT 1685 MU496 MU
RapidArc Tissue Sparing – H&N
RapidArcSingle arc IMRT
Conventional7-field IMRT 1685 MU496 MU
RapidArc Tissue Sparing – H&NRapidArc (solid) IMRT (dashed)
PTV 1PTV 2
Brainstem
CordLt Parotid
Rt ParotidRt SMG
LarynxMandible
• Dose conformity • Tissue sparing
• Plan complexity• Treatment time• Risk of secondary
cancer
RapidArc Objectives
RapidArc Plan Simplicity
• Single IMRT arc• 15-30 minutes
to optimize• 10-20 minutes
to calculate• Eclipse™ treatment
planning system module
• Dose conformity • Tissue sparing
• Plan complexity• Treatment time• Risk of secondary
cancer
RapidArc Objectives
RapidArc Treatment Time
• Treat in 2 minutes or less
• Efficient in monitor units (MU) < 600 MU/ 2Gy
RapidArc Treatment Time
• Speed is accuracy– Greater patient comfort– Reduced external motion (wiggle factor)– Reduced internal motion (peristaltic motion)
RapidArc Treatment Time
• Economics– Treat 16 more patients per day
• Increase from 32 to 48 treatments• 15 minute standard treatment schedule• 10 minute RapidArc treatment schedule• Make time for more complex treatments• SRS, IGRT, DART™ dynamic adaptive radiation
therapy
• Dose conformity • Tissue sparing
• Plan complexity• Treatment time• Risk of secondary
cancer
RapidArc Objectives
RapidArc Reduced Risk
• 30-60% fewer monitor units– Lower risk of secondary
cancer induction– Less head scatter– Less MLC leakage
RapidArc Summary
• Treat in under 2 minutes• Reduce out of field dose• Simple planning and treatment• Large treatment volume• No compromises