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Aperture based IMRT | OAPS

Optimization After Pre-Segmentation (OAPS) :
An automated aperture-based  solution for personalized and efficient IMRT

The OAPS module of the ISOgray suite offers the possibility to prepare in seconds a personalized IMRT plan for situations where a limited number of segments allows to meet the clinical requirements.  It is mostly efficient for breast treatments or some Head&Neck cases, where IMRT is used as replacement of traditional wedge filters or 2D mechanical compensators. It achieves an optimal uniform dose distribution throughout the target volume with a minimal number of Monitor Units. Time consuming compensator manufacturing, wedge manipulation and beam contamination are avoided.

  • Simplicity & Performance

Optimization After Pre-Segmentation - OAPS - is a simple, automated and fast fluence modulation technique designed for beam compensation. It does not change the traditional workflow but relieves from the tedious manual selection of beam weights and wedge angle. The resulting dose distribution is much more uniform than with conventional wedges. The treatment itself is simpler and faster.

 

  • Optimize all the treatment steps

1 -  Planning : The adoption of an automatic planning method allows an optimization of the dose uniformity throughout the target volume, independent of the planner's skill. The software provides tools for dose control within organs at risk. Its integration in the planning workflow is immediate, thus facilitating the standardization of planning practices.  

2 - Treatment : Simple and fast impementation. Patient positioning and beam set-up are unchanged. The suppression of beam modifiers eliminates their constraints and the possible errors associated with their manipulation. With its methodology, the OAPS is intuitive. The understanding of segment shapes is easy and relieves from the need of dosimetric pre-treatment control.  

3 - Clinical outcome : Eliminating the hot and cold spots, protecting organs at risk is likely to reduce side effects and to improve cosmetic results and patient quality of life after treatment.