RTSTRUCT Laterality Detector – Identify Left vs Right Targets Without CT

🚀 Detect Left vs Right Targets — Without CT

When working directly with DICOM RTSTRUCT data, determining target laterality isn’t always straightforward.

This tool provides a simple, robust method to identify whether a structure is on the left, right, or midline — using only RTSTRUCT contour geometry.

💡 What This Tool Does

✔️ Computes body-based midline from external contour

✔️ Calculates ROI centroid from contour points

✔️ Classifies target as Left / Right / Midline

✔️ Works directly from RTSTRUCT — no CT required

⚙️ Key Features

• No image loading or visualization needed

• Fully based on DICOM RTSTRUCT geometry

• Lightweight and fast — ideal for automation

• GUI-based workflow for easy ROI selection

• Ready for integration into QA pipelines

🧪 Use Cases

👉 TPS-independent plan checks

👉 Automated QA workflows

👉 DICOM data validation

👉 Research and scripting projects

⚠️ Important Notes

This method assumes a symmetric body contour.

👉 For extremity setups (arms, legs) or partial-body scans,

the external contour may not represent the true patient midline.

In those cases, laterality results may be unreliable and should be interpreted with caution.

🎯 Why This Matters

In many automated or backend workflows, CT images are not available.

This tool gives you a clean, geometry-based solution to extract clinically meaningful information directly from RTSTRUCT — enabling more scalable and robust pipelines.

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