DICOM Geometry QA Toolkit (Python Scripts for RTSTRUCT & RTPLAN Analysis)

Automate key geometric checks directly from DICOM — no TPS required.

This bundle includes two practical Python scripts designed for radiation oncology workflows, helping you extract meaningful geometric insights from RTSTRUCT and RTPLAN files.

🔧 What’s Included

✅ 1. PTV Center to Isocenter Distance Script

• Computes the 3D distance between the PTV centroid and treatment isocenter
• Uses RTSTRUCT + RTPLAN
• Area-weighted centroid calculation for improved accuracy
• Supports multiple beams and detects unique isocenters
• Includes Frame of Reference validation to prevent incorrect calculations

✅ 2. Isocenter to Patient External Center (Lateral Shift) Script

• Computes lateral distance between isocenter and patient external contour center
• Uses RTSTRUCT + RTPLAN
• Helps estimate potential clearance or setup issues
• User-defined body contour name
• Simple and fast geometric approximation for QA workflows

💡 Why This Matters

These scripts help you:

• Perform independent QA checks outside the TPS
• Validate plan geometry quickly and consistently
• Build your own automation workflows
• Reduce manual checks and increase confidence in plan setup

👩‍💻 Who This Is For

• Medical physicists
• Dosimetrists
• Researchers working with DICOM RT data
• Anyone interested in DICOM workflows

🚀 What You’ll Gain

Instead of manually checking geometry inside your planning system, you’ll be able to:

• Extract key metrics instantly
• Reuse scripts across multiple patients
• Start building your own clinical-grade automation tools

🛠️💡 Need customization? Contact me to adapt this tool to your workflow.