RTSTRUCT PTV–OAR Distance Metrics Tool | Radiation Therapy Geometry Analysis

RTSTRUCT PTV–OAR Distance Metrics Tool

Calculate geometric relationships between targets and organs-at-risk directly from DICOM RTSTRUCT files.

This tool computes clinically useful geometric metrics between a target volume (PTV) and surrounding organs-at-risk (OARs) using only RTSTRUCT contour data — no CT images required.

It reconstructs structure geometry from DICOM contour points, builds a synthetic 3D grid around the target, and efficiently calculates distance statistics and overlap metrics.

Perfect for:

• Radiation oncology researchers

• Treatment planning quality analysis

• Machine learning feature extraction

• Plan quality prediction studies

Key Features

✔ Load DICOM RTSTRUCT files directly

✔ Select target ROI (PTV)

✔ Compute metrics for multiple OAR structures automatically

✔ Adjustable grid resolution and padding

✔ Export results as CSV for analysis in Python, R, or Excel

Metrics Computed

The tool calculates geometric relationships such as:

• Minimum PTV–OAR distance

• Overlap volume

• Distance percentiles (D10, D50, D90)

• Fraction of OAR within distance thresholds

These metrics are commonly used in:

• dose falloff modeling

• knowledge-based planning

• radiotherapy outcome prediction