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IMRT1

Rx: 79.2Gy/44fx

RTOG-0815

1:49 IMRT treatment field delivery time

Beams
DVH
Metrics

Name (ID): SBRT, PROSTATE (AAMD_RSS2016PS)
Plan or PlanSum ID: 79Gy9fld0815

Structure ID Structure Code Patient Structure DVH Objective Evaluator Variation Priority Met Achieved
PTV   PTV V79.2Gy[%] >=98     Goal 99.82 %
PTV   PTV D0.03cc[Gy] <=84.744 87.12   Goal 84.398 Gy
PTV   PTV Min[Gy] >=75.24 73.656   Goal 76.561 Gy
BLADDER   Bladder V80.0Gy[%] <=15 20   Goal 0.19 %
BLADDER   Bladder V75.0Gy[%] <=25 30   Goal 1.12 %
BLADDER   Bladder V70.0Gy[%] <=35 40.00001   Goal 2.12 %
BLADDER   Bladder V65.0Gy[%] <=50 55.00001   Goal 3.16 %
RECTUM   Rectum V75.0Gy[%] <=15 20   Goal 2.32 %
RECTUM   Rectum V70.0Gy[%] <=25 30   Goal 4.95 %
RECTUM   Rectum V65.0Gy[%] <=35 40.00001   Goal 7.73 %
RECTUM   Rectum V60.0Gy[%] <=50 55.00001   Goal 10.86 %
PENILE BULB   penile bulb Mean[Gy] <=52.5     Goal 5.981 Gy
Technical Plan Comments

Nine (9) field IMRT plan with manually selected gantry positions which followed the shape of the target in the transverse view.  There really weren’t too many challenges in this case, the only metric that provided a challenge was achieving the minimum PTV coverage constraint.  When a protocol enforces a minimum dose to the target, the temptation is to simply perform a uniform expansion on the target and optimize on the expanded target.  However, in this case, an optimization PTV was created and stretched outward only along the edges of the real PTV where the minimum dose was not met.  Careful attention was paid to minimize stretching where the target interfaced/overlapped with an OAR (rectum).

Physician Comments

Simple prostate only case, fractionated. All constraints on the bladder, rectum, bowel are met. 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.
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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