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VMAT1

Rx: 50Gy/5fx

RTOG-1112

4:59 VMAT treatment arc delivery time

Beams
DVH
Metrics

Name (ID): Liver, SBRT (LiverSBRT)
Plan or PlanSum ID: 4aVMATID

Structure IDStructure CodePatient StructureDVH ObjectiveEvaluatorVariationPriorityMetAchieved
PTVP_R_liver_50V50.0Gy[%]>=9590Goal95.56 %
LIVER-GTVO_normal_liverMean[Gy]<=1313.2Goal12.595 Gy
ESOPHAGUSO_EsgsD0.05cc[Gy]<=3234Goal18.651 Gy
STOMACHO_StmcD0.05cc[Gy]<=3032Goal16.976 Gy
DUODENUMO_bowel_bagD0.05cc[Gy]<=3032Goal2.992 Gy
SMALL_BOWELO_bowel_bagD0.05cc[Gy]<=3032Goal2.992 Gy
LARGE_BOWELO_bowel_bagD0.05cc[Gy]<=3234Goal2.992 Gy
SPINAL_CORD_05SpinalCord_05D0.05cc[Gy]<=2528Goal21.144 Gy
KINDEYSKidneysMean[Gy]<=1012Goal1.376 Gy
LIVER-GTVO_normal_liverD70.0%[Gy]<=70Goal2.019 Gy
LIVER-GTVO_normal_liverV10.0Gy[cc]<=700Goal446.61 cc
Technical Plan Comments

Four arc (4) VMAT technique was chosen and 4 almost complete arcs were used.  Unique collimator rotations per field were automatically generated by the arc geometry tool.  By far, the most challenging aspect of this plan was achieving the mean dose to uninvolved liver constraint.  By placing large constraints on healthy liver in the optimizer that constraint was able to be met, at the cost of some dose conformality.  All constraints were met as requested by the protocol with no variations cited.

Physician Comments

This is a large liver lesion treated with SBRT. Given the size of the lesion, liver sparing is always a concern. This is achieved appropriately in this case. This is a clinically acceptable plan.

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.
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