ROI Coordinates File Format

This page details the file format when ROI coordinates are written to disk by the ROI Toolkit of Jim.

A coordinates file is a plain text file, consisting of:

• A header line which looks like one of the following:
  

      # R A S
  
      # L P S
  
      # x y z    
    

  depending on the coordinate system chosen.
• An entry for each ROI, with the following format.
  A single line to introduce each ROI. If the ROI is annotated:
  # Annotation
  or if the ROI is not annotated:
  #
  
  This is followed by the pixel coordinates related to the ROI, with each coordinate on its own line of text. The coordinates written depend on the type of ROI:
  • Marker and Text ROIs. The position of the Marker/Text is written.
  • Line ROIs. The positions of the two ends of the line are written.
  • Curved Line and Open Spline ROIs. The positions of points along the line are written.
  • All other types of ROI. For each pixel where the centre of the pixel is within the ROI, the coordinates of the pixel centre are written.