Radiation Oncology - Dose Accumulation

Tumor Recurrence

Determining a safe dose to deliver to organs-at-risk for retreatment is a challenging problem. With changes in weight, patient positioning, and anatomy, visual comparison of two plans or simple rigid addition of dose is undesirable.

The recent ASTRO IMRT Documentation Working Group document¹ addresses this problem by recommending software provide the ability to deform previously delivered dose distributions to the current anatomy allowing the previously delivered dose to be seen on the current anatomy.

MIM provides deformable tools within the VoxAlign Deformation Engine^TM to meet this need providing important additional information for retreatment.

Dose-guided adaptive therapy

MIM's tools for adaptive therapy help to make replanning for adaptive therapy a feasible part of the clinical workflow. With the generation of new plans during a course of treatment, deformable accumulation of the dose allows you to obtain a more accurate picture of the total dose to be delivered making dose-guided adaptive therapy possible.

Key features

• deform dose to visualize previous plan on current anatomy to aid retreatment planning
• vendor-neutral software allows you to combine dose from any major vendor
• RT CD viewer provides a portable archive for patient treatment data essential in the event of future tumor recurrence
• combine dose from multi-modality (e.g. Cyberknife and IMRT) or boost treatments
• identify areas of possible overdosing to critical structures
• determine total dose delivered for replanning with adaptive therapy

See the Tuen Mun Hospital Case Study on the value of dose accumulation.

1. Low D, Yin F, Homes T, et al. American Society of Radiation Oncology Recommendations for Documenting Intensity-Modulated Radiation Therapy Treatments. IJROBP 2009; 74(5):1311-1318.