Radiotherapy dose calculation optimization

The Problem

Dose calculation workflows were bottlenecking the clinical planning pipeline. Monte Carlo simulation times made iterative plan optimization impractical.

Our Approach

We profiled the ray-tracing and dose kernel implementations, identified memory access patterns as the primary bottleneck, and restructured the algorithms for GPU-friendly access patterns.

Results

• Reduced dose calculation time from 45 minutes to 4 minutes per plan
• Maintained <1% numerical deviation from reference implementation
• Delivered with full validation suite and documentation