Accurate and efficient contouring
The module contains tools for creating a rich and accurate representation of the patient anatomy for the treatment planning process.
Advanced manual and semi-automatic contouring
The system includes a comprehensive toolset for manual contouring such as polygon, freehand, paintbrush/2D rollerball and local deformations (push-and-pull). It also supports regions-of-interest (ROI) with voxel-based triangulation, 4D visualization and Boolean algebra for combining ROIs. Templates can be saved with or without the geometries included which can then be recalled on future patients.
Model-based segmentation (MBS)
MBS is a semi-automatic tool for delineation of regions of interest based on biomechanical and statistical information about organs. Volumetric images are segmented semiautomatically, utilizing a combination of greyscale gradients and models with knowledge of how organs may change shape. It is possible to delineate multiple regions of interest simultaneously which increases throughput, accuracy and reproducibility.
Atlas-based segmentation*: a versatile auto-segmentation tool
The idea is to take existing data from the clinic database to create templates with multiple image sets – atlases – and use these to segment new image data by locating the best matching atlas through rigid image registration and apply deformable registration to deform the ROI and POI geometries onto the new image set. The geometries contained in each atlas can be manually contoured or generated with MBS. If MBS ROIs are available in the template they may be automatically adapted after atlas-based initialization is completed. Derived ROIs created from a template will automatically be updated after initialization and MBS adaptation.
*Only available in RayStation
Rigid and deformable registration of multi-modality imaging CT, CBCT, PET or MR is fully supported and integrated with the adaptive radiation therapy functionality. It can be used for showing fused images as a reference while contouring, and for mapping regions or points of interest between image sets.