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Pattern Region of Interest Analysis System (PRIAS)

The EDAX Pattern Region of Interest Analysis System (PRIAS™) is a synergistic new approach for imaging and visualizing a material’s microstructural features. This unique system uses electron backscatter diffraction (EBSD) detectors to capture and index EBSD patterns and as an array of positional electron detectors for sample imaging. By synchronously imaging from up to 25 detector regions of interest (ROIs), multiple images can be generated and displayed simultaneously, showing orientation, atomic number, and topographic contrasts. Further arithmetic processing of this array of images allows unprecedented analysis and visualization of material microstructure and the isolation, enhancement, or suppression of specific contrast mechanisms of interest.

Pattern Region of Interest Analysis System (PRIAS™)


Optimal EBSD pattern collection requires a highly tilted sample and a well-polished surface, which makes traditional SEM imaging challenging, as SE and backscattered electron (BSE) detectors are not optimally positioned for imaging a tilted sample. A forward scatter detector (FSD) system can enhance imaging capability. However, multiple detectors or exposures from a single variably-positioned detector may be necessary to fully utilize the information in the electrons scattered from the sample. These detectors must be placed away from the maximum signal around the perimeter of the EBSD phosphor screen. PRIAS removes the need for additional hardware and pre-selection or positioning of detectors by simultaneously imaging all detectors to capture a set of images with optimal contrast.

Features and benefits

Synchronous image collection from all ROI detectors
  • Easily and quickly select the optimum image for sample visualization
PRIAS Live mode
  • Dedicated mode for fast microstructural imaging
  • 25 fixed ROI detectors
PRIAS Collection mode
  • PRIAS imaging data is automatically collected simultaneously with APEX™ EBSD mapping data
  • No user input is required for collection
  • Preset ROIs for orientation, topographic, and atomic number contrast imaging
  • Direct correlation with orientation, chemical, and phase data
PRIAS Analysis mode
  • Imaging generated from saved EBSD patterns
  • Fully flexible positioning of ROI detectors
  • Direct correlation with orientation, chemical, and phase data
Arithmetic image processing
  • Processing of multiple images simultaneously for maximum information extraction
RGB image coloring
  • Red, green, or blue color channels can be assigned to any ROI images
  • Creates a fast microstructural image instead of the full orientation imaging microscopy (OIM) image
Automated detector and imaging setup
  • Camera optimization sets up the camera for fast PRIAS Live imaging
  • Save time by not adjusting contrast and brightness for each image manually


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