Coronary Calcium Score Program

• calculates the calcium volume for each coronary artery and the total volume
• calculates the Agatston score for each coronary artery and the total score

• detects coronary calcium (threshold 130 HU)
• calculates the percentile
  Note: For percentile calculation, the patient's age and sex must be specified in the DICOM data
• Calculating percentiles allows for an approximate comparison of a patient's calcification score with the range of values (statistics) observed in people of similar age and gender, expressed as percentiles
  Statistics used in this program:

  

  See Maurice W.J.de Ronde, et al. A pooled-analysis of age and sex based coronary artery calcium scores percentiles
  Journal of Cardiovascular Computed Tomography
  Volume 14, Issue 5, September–October 2020, pp 414-42

Launching the "Coronary Calcium Score" Program

• Click on the "Programs" button in the tool panel, "Studies" group
• Click on the "Calcium Score" button
• The screen will split into 2 panels:
  An axial image panel and a control panel with the results table
  In the series header, there is a switch - , which allows displaying three standard MPR panels and a control panel with the results table for complex cases

Controlling Automatic Calcium Detection

• Move the Color Transparency slider (in the series header, to the right of the "Calcium Score" button) to the right
or
• Click the "Show/Hide Artery Coloring" button in the control panel
to verify the correctness of the automatic coloring

Control Panel

• Click on the button with the abbreviation of the coronary artery name (if you hover the mouse cursor over the button without clicking, the full name will appear)
• Outline a fragment of calcification in the selected coronary artery on the axial scan
  Actions are similar to the "Closed Pencil" tool of the program
• Scroll through the images with the mouse wheel, thus selecting all calcified areas
• If a fragment was selected erroneously, use the Eraser tool
  Actions are similar to the "Closed Pencil" tool
• Repeat the above actions for all coronary arteries

Saving Results

Saving in Vidar Dicom Viewer

Saving the Results Table

• If no region of interest (table rows or columns) is selected, all data will be saved
• Click the "Copy" button to copy the analysis results to the clipboard for pasting into a standard text document
• Click the "Save" button to save the analysis results to a *.csv file for subsequent use in MS Excel
• Click the "Print" button to send the analysis results to the print
• Click the "Save User Series" button to save the analysis results to a user series (it will be located in the Preview Bar at the end of the study)

Exiting the "Coronary Calcium Score" Program Mode

• Click on the "Calcium Score" button in the program header
• Click on the "Exit Mode" item