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VMAT

Rx: 50Gy/5fx

RTOG-1112

 

Beams
DVH
Metrics

Name (ID): Liver, SBRT (LiverSBRT_med___affairs)
Plan or PlanSum ID: Edge

Structure ID Structure Code Patient Structure DVH Objective Evaluator Variation Priority Met Achieved
PTV   P_R_liver_50 V50.0Gy[%] >=95 90   Goal 99.51 %
LIVER-GTV   O_normal_liver Mean[Gy] <=13 13.2   Goal 12.040 Gy
ESOPHAGUS   O_Esgs D0.05cc[Gy] <=32 34   Goal 17.492 Gy
STOMACH   O_Stmc D0.05cc[Gy] <=30 32   Goal 8.868 Gy
DUODENUM   O_bowel_bag D0.05cc[Gy] <=30 32   Goal 5.280 Gy
SMALL_BOWEL   O_bowel_bag D0.05cc[Gy] <=30 32   Goal 5.280 Gy
LARGE_BOWEL   O_bowel_bag D0.05cc[Gy] <=32 34   Goal 5.280 Gy
SPINAL_CORD_05   SpinalCord_05 D0.05cc[Gy] <=25 28   Goal 19.067 Gy
KINDEYS   Kidneys Mean[Gy] <=10 12   Goal 1.606 Gy
LIVER-GTV   O_normal_liver D70.0%[Gy] <=70     Goal 1.829 Gy
LIVER-GTV   O_normal_liver V10.0Gy[cc] <=700     Goal 448.18 cc
Technical Plan Comments

Two arc (2) VMAT technique was chosen and 2 almost complete noncoplanar arcs were used with the couch rotated 13 degrees eityher direction from zero.  Unique collimator rotations per field were selected (315/45).  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.  Do to the non coplanar arrangement lateral dose spill was minimized.  The photon optimizer used the extended convergence calculation option and the MU objective was enabled (strength 70) with minimum MU 1000 maxiumum MU 3000.  All constraints were met as requested by the protocol with no variations cited.

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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