Head / Neck Adaptive

Summary

This is the dataset used in the AAMD 2023 Plan Study and publicly available via the ProKnow Quality Systems website.

This patient is a head/neck patient where a bolus might not conventionally be considered because of practical considerations (e.g., bolus wrapping around to the posterior of the patient).

However, a considerable portion of the target voxels are shallow enough to warrant considering bolus. OptiBol custom-fit boluses could improve target coverage for such patients if the immobilization / posterior bolus support challenges could be addressed.

Gallery

1. Depth-volume histograms showing the minimum depth of target voxels (union over all PTVs) for the case of no bolus as well as for two variable-thickness bolus designs with 10 mm and 15 mm buildup (respectively) to the underlying target
2. 3D display in the p.d software of the OptiBol with 15 mm goal buildup
3. Axial planes showing no bolus, OptiBol 10 mm, and OptiBol 15 mm

Details on Depth-Volume Histograms (Gallery Item 2)

Variable-Thickness OptiBol (Goal 15 mm to Target)

• 100% of the target voxels have min depth ≥ 10 mm (0% target < 10 mm)
• 96.4% of the target voxels have min depth ≥ 15 mm (3.6% target < 15 mm)

Variable-Thickness OptiBol (Goal 10 mm to Target)

• 98.5% of the target voxels have min depth ≥ 10 mm (1.5% target < 10 mm)
• 81.3% of the target voxels have min depth ≥ 15 mm (18.7% target < 15 mm)

No Bolus

• Only 77.3% of the target voxels have min depth ≥ 10 mm (22.7% target < 10 mm)
• Only 59.9% of the target voxels have min depth ≥ 15 mm (40.1% target < 15 mm)