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VMAT1

Rx: 30Gy/12fx to Brain, also 51Gy to metastases  (simultaneous integrated boost)

2015 AAMD/Sun Nuclear Plan Challenge

http://filecache.drivetheweb.com/mr5mr_varianmedicalaffairs/177432/badge_award-128_clean_yellow80.png

< 3 min VMAT treatment arc delivery time (estimated)

Beams
DHV
Metrics

Name (ID): AAMD2015, HCSWB_SIB (AAMD2015)
Plan or PlanSum ID: HCSWB_SIB4a

Structure IDStructure CodePatient StructureDVH ObjectiveEvaluatorVariationPriorityMetAchieved
GTV_TOTAL_METGTV_Total_MetD99.0%[Gy]>=5048Goal51.765 Gy
PTV_TOTAL_METPTV_Total_MetD98.0%[Gy]>=4946Goal51.310 Gy
PTV_TOTAL_METPTV_Total_MetD2.0%[Gy]<=5557Variation55.160 Gy
PTV_TOTAL_METPTV_Total_MetV51.0Gy[%]>=9590Goal99.21 %
PTV_WBPTV_WBD98.0%[Gy]>=2725Goal27.993 Gy
PTV_WBPTV_WBD2.0%[Gy]<=37.540Variation38.784 Gy
PTV_WBPTV_WBV30.0Gy[%]>=9390Goal94.45 %
HIPPOCAMPUS_TOTLHippocampus_TotlD0.03cc[Gy]<=1630Goal15.879 Gy
HIPPOCAMPUS_TOTLHippocampus_TotlMean[Gy]<=1220Goal11.634 Gy
HIPPOCAMPUS_TOTLHippocampus_TotlMin[Gy]<=915Goal8.757 Gy
CHIASMChiasmD0.03cc[Gy]<=3137.5Goal30.650 Gy
BRAINSTEMBrainstemD0.03cc[Gy]<=3337.5Goal32.649 Gy
CORDCordD0.03cc[Gy]<=2537.5Goal24.292 Gy
LEYELeyeMean[Gy]<=615Variation6.695 Gy
REYEReyeMean[Gy]<=615Variation6.801 Gy
LLACRIMALLLacrimalMean[Gy]<=1020Goal9.853 Gy
RLACRIMALRLacrimalMean[Gy]<=1020Goal8.869 Gy
LLENSLLensD0.03cc[Gy]<=410Goal3.713 Gy
RLENSRLensD0.03cc[Gy]<=410Goal3.781 Gy
LOPTICLopticD0.03cc[Gy]<=3037.5Goal29.545 Gy
ROPTICRopticD0.03cc[Gy]<=3037.5Goal29.587 Gy
Technical Plan Comments

Four (4) arc VMAT technique was chosen and 4 almost complete arcs were used.  Each arc used a different start and stop angle (offset by 1 degree) to stagger the available control points throughout each arc rotation and unique collimator rotations per field were automatically generated utilizing the arc geometry tool. 

 

The plan challenge plan quality metric grading criteria was designed expecting the use a non-coplanar  arc arrangement with a vertex arc, but this beam arrangement proved not to be critical as the resulting coplanar plan created here scored higher than 80% of the cases submitted in this year’s challenge  The resulting plan suffers a bit in the homogeneity criteria mainly as a result of a less sharp dose gradient around the metastases, likely due to being limited to a coplanar arc arrangement. 

Comparative Plan Quality
Links

Review 3rd party software generated full treatment plan report

PDF

                              

Download full DICOM CT, struct, plan and dose file         

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Any reference to a "plan study" are simply what the organizers call each case and may not be a "study" in the FDA sense as they may not have been published in a peer reviewed journal.
Varian does not provide medical advice and these are illustrative examples only.
Leading plans by expert planner. Your results may vary.

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