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IMRT1

Rx: 50Gy/25fx

RTOG-1203

6:03 (total) IMRT treatment field delivery time (two isocenter plan)

Beams
DVH
Metrics

Name (ID): zz_gyn1, zz_gyn1 (zz_gyn1), (zz_gyn1)
Plan or PlanSum ID: Eti10cm2IsoIM

Structure ID Structure Code Patient Structure DVH Objective Evaluator Variation Priority Met Achieved
PTV5040   PTV_5040 V50.4Gy[%] >=97     Goal 98.54 %
BOWELSPACE   BowelSpace V40.0Gy[%] <=30 70   Goal 15.43 %
RECTUM   RECTUM_RTOG V40.0Gy[%] <=80 99.9   Goal 76.35 %
BLADDER   BLADDER V45.0Gy[%] <=35 70   Variation 52.50 %
PELVICBONES   PELVIC BONES D90.0%[Gy] <=10 25   Goal 9.232 Gy
PELVICBONES   PELVIC BONES V40.0Gy[%] <=37 60   Goal 22.88 %
Technical Plan Comments

This cervix/pelvis case target shape (sometimes referred to as a “chimney” field) proved too large (head to foot) to fit inside a single isocenter beam arrangement on this linear accelerator.  Two isocenters were placed with a single 10cm head to foot shift between them to accommodate this large target.  Eleven (11) non equally spaced beams were placed on the inferior isocenter with beam edges set manually to follow the shape of the target in the transverse plane and only seven (7) beams were placed on the superior isocenter as the superior target portion was a simpler shape .  All eighteen (18) beams were optimized together in a single plan and the plans were then broken apart into separate single isocenter plans for treatment delivery as required by the current software release.  Dose constraints followed RTOG-1203 and were all met except a minor deviation in bladder dose due to the amount of overlap with the target.

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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