Multimet (5) brain metastasis

VMAT SX1 | VMAT SX2

VMAT SX1

Rx: 21Gy+18Gy/1fx

Five brain mets, three on the same plane

 

Beams
DVH
Simple DVH Metrics

Name (ID): P3Brain, P3Brain (P3Brain)
Plan or PlanSum ID: SX1_7noBrid

Structure ID Structure Code Patient Structure DVH Objective Evaluator Variation Priority Met Achieved
4GyBrain_noPTV   BRAIN_PTV V4Gy[cc]         208.50 cc
12GyBrain_noPTV   BRAIN_PTV V12Gy[cc]         21.83 cc
21GyBrain_noPTV   BRAIN_PTV V21Gy[cc]         0.99 cc
Brain_noPTV   BRAIN_PTV Mean[Gy]         2.363 Gy
PTV1   1PTV_LP_21 V100%[%] >=99     Goal 99.45 %
GTV1   1GTV_LP Max[%]         149.2 %
GTV1   1GTV_LP Max[Gy]         31.326 Gy
GTV1   1GTV_LP Min[Gy]         26.252 Gy
GTV1   1GTV_LP V100%[cc]         0.22 cc
GTV1   1GTV_LP Volume[cc]         0.22 cc
PTV2   2PTV_LPG_21 V100%[%] >=99     Goal 99.00 %
GTV2   2GTV_LPG Max[%]         163.3 %
GTV2   2GTV_LPG Max[Gy]         34.283 Gy
GTV2   2GTV_LPG Min[Gy]         22.395 Gy
GTV2   2GTV_LPG V100%[cc]         1.15 cc
GTV2   2GTV_LPG Volume[cc]         1.15 cc
PTV3   3PTV_RP_21 V100%[%] >=99     Goal 99.69 %
GTV3   3GTV_RP Max[%]         154.6 %
GTV3   3GTV_RP Max[Gy]         32.463 Gy
GTV3   3GTV_RP Min[Gy]         23.763 Gy
GTV3   3GTV_RP V100%[cc]         1.37 cc
GTV3   3GTV_RP Volume[cc]         1.37 cc
PTV4   4PTV_RF_21 V100%[%] >=99     Goal 99.50 %
GTV4   4GTV_RF Max[%]         133.2 %
GTV4   4GTV_RF Max[Gy]         27.976 Gy
GTV4   4GTV_RF Min[Gy]         24.494 Gy
GTV4   4GTV_RF V100%[cc]         0.07 cc
GTV4   4GTV_RF Volume[cc]         0.07 cc
PTV5   5PTV_RT_18 V18Gy[%] >=99     Goal 99.95 %
GTV5   5GTV_RT Max[%]         137.0 %
GTV5   5GTV_RT Max[Gy]         28.766 Gy
GTV5   5GTV_RT Min[Gy]         21.329 Gy
GTV5   5GTV_RT V100%[cc]         1.91 cc
GTV5   5GTV_RT Volume[cc]         1.91 cc
Brainstem   Brainstem Max[Gy]         9.670 Gy
Chiasm   Chiasm Max[Gy]         6.539 Gy
OpticNerve_L   OptNrv_L Max[Gy]         4.697 Gy
OpticNerve_R   OptNrv_R Max[Gy]         6.663 Gy
Eye_L   Eye_L Max[Gy]         3.046 Gy
Eye_R   Eye_R Max[Gy]         4.023 Gy
Technical Plan Comments

This plan was created with simple optimization objectives: max dose constraints to OARs and miniumum dose contraints to targets.  The manual NTO was employed with Priority 140, Distance .3cm, Start Dose 100%, End Dose 8%, Fall Off .25.  Extended convergence mode was selected in the Photon Optimizater calculation options in Eclipse V15.5+.

Multiple distinct targets on the same plane can be a challenge when utilizing coplanar deliver methods.  For this case a special otpimization structure was created to prevent "dose bridging" at the 50% isodoe level.

Links

3rd party software plan report

PDF

                               

DICOM patient export        

ZIP        

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.

FOR EDUCATIONAL AND SCIENTIFIC EXCHANGE ONLY – NOT FOR SALES OR PROMOTIONAL USE.