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IMRT1

Rx: 68Gy/34fx to Prostatic fossa and 56Gy to lymph nodes (simultaneous integrated boost)

2011 AAMD / ROR Plan Challenge

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3:12 IMRT treatment field delivery time

Beams
DVH
Metrics

Name (ID): Z002441-PROS, AAPM (AAPM Z002441-PROS)
Plan or PlanSum ID: 9f1d

Structure ID Structure Code Patient Structure DVH Objective Evaluator Variation Priority Met Achieved
PTV_68   PTV_68 V68.0Gy[%] >=95 90   Goal 95.20 %
PTV_56   PTV_56 V56.0Gy[%] >=95 90   Goal 95.63 %
GTV68   GTV68 V68.0Gy[%] >=99 94   Goal 99.88 %
PTV_68   PTV_68 D0.03cc[Gy] <=71.4 78.2   Variation 72.225 Gy
PTV56 - PTV68   PTV56 - PTV68 V58.8Gy[%] <=5 45   Variation 15.07 %
RECTUM   Rectum V68.0Gy[cc] <=0 10   Variation 0.02 cc
RECTUM   Rectum V65.0Gy[%] <=5 25   Goal 4.42 %
RECTUM   Rectum V40.0Gy[%] <=20 40   Variation 22.16 %
BLADDER   Bladder V65.0Gy[%] <=15 40   Variation 19.00 %
BLADDER   Bladder V40.0Gy[%] <=40 70   Variation 40.32 %
Technical Plan Comments

Nine (9) field IMRT, manually selected gantry positions which follow the shape of the target in the transverse view.  The biggest challenge in this case proved to be the amount of prescription dose outside of the high dose target (volume of regret).  This is probably the effect of 1cm leaves but the effect was minimized by rotating the collimator to unique angles per gantry position (as evidenced by the comparatively high plan score).  Collimator rotation was selected after an evaluation of the beam’s eye view in an attempt to mimic the angle or shape of the target.

Physician Comments

Prostate postoperatvie only case, fractionated. All constraints on the bladder, rectum, bowel are met. This is a clinically acceptable plan.

Comparative Plan Quality
Links

Review 3rd party software generated full treatment plan report

PDF

                              

Download full DICOM CT, struct, plan and dose file         

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.

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