Delta™

Delta™ is a software utility for comparing scans, that has been developed to simplify the process of registering and making surface and volume measurements on complex 3D shapes. Delta™ works directly with files generated by the FastSCAN™ family of hand-held laser scanners to provide complete work-flow solutions to many difficult problems.

Delta™ registers two different scans of a surface, from which volume differences and displacement maps can be calculated, and surface measurements made. Delta™ can also calculate volumes from a concavity or convexity, by using 3D interpolation techniques to create a reference surface.



Above: Scans were performed before and after third molar tooth extraction.(1) The surfaces have been registered and colormap of differences displayed. The volume of the swelling can also be calculated.

Applications

  • Medical (1)
    • Surgical pre- and post-operative comparisons
    • Wound healing analysis
    • Trauma measurements
    • Orthotics and prosthetics
  • Forensic
    • Image cataloging
    • Trauma measurements
  • Archaeological
    • Image cataloging
    • Quantitative specimen analysis

Features

Interoperability

Delta™ has been integrated with the FastSCAN hand-held laser scanner software to enable quick and simple exchange of surface data.

Landmarks and Surface Based Registration

Delta™ has the capability to import embedded or user-defined landmarks. Once landmarks are defined, registration is accomplished quickly and effortlessly using a combination of both landmark and surface-based algorithms to ensure the best possible results (patent pending).

Intuitive Graphical User Interface

Delta™ incorporates a simple intuitive graphical user interface that displays dual windows for ease of use. The interface allows the user to determine exactly where landmarks and regions of interest are placed. Numerical and other data such as landmark locations and volumes are presented clearly in a separate window visible below the main display.

Display, Define and Calculate Colormaps, Cross-sections and Volumes

Once images are registered, a colored graphical displacement map may be shown on the surface to highlight differences. A color bar to the right of the image correlates to the amount of difference in millimeters. For a specific area of interest, the user can define appropriate boundaries in order to calculate volume differences. Cross-sections may also be specified for calculation of linear distances and the display of contours on a selected plane. By using a proprietary 3D interpolation process, Delta™ can also calculate absolute volumes on a single scan.



Output

Delta™ generates a report in html format, which can be printed or viewed using a web browser. The output report includes any landmarks, volumes and sections that have been defined.

Above: Calculating the volume of a concavity; from top to bottom: (i) load in the scan; (ii) interpolate over the surface in left window, creating a reference scan; (iii) display a colormap; (iv) calculate the volume.
To download a demonstration version of Delta™, visit our Delta download page,

and for further information please email delta@aranz.com

(1) The systems are not certified for medical or bio-medical use. Any reference to medical or bio-medical use are examples of what medical companies have done with the systems after obtaining all necessary or appropriate medical certifications. The end user and OEM must comply with all pertinent regulatory requirements from the FDA, CE pertaining to the development and sale of medical devices and all other regulatory requirements.