The Stenosis Analysis Program is designed to calculate the degree of stenosis of the vessel lumen
Launching the "Stenosis Analysis" Program
Build a vessel in the "Vessels" Program, or select a pre-existing one from the list
Click the "Vessel Analysis" button
Click the "Stenosis Analysis" button if it is not active
The screen will split into 5 panels:
1 - Arbitrary curvilinear projection with free rotation
2 - Cross-section of the stenosis zone
3 - Control cross-section
4 - Table of measurement results
5 - Vessel longitudinal view and the vessel lumen graph above it
Manipulations for Correct Stenosis Calculation
Using the scroll bar slider on the vessel longitudinal panel, or by rotating the mouse wheel, achieve optimal display of the stenosis
Place the red linear cursor ("Lesion") on the longitudinal view, referencing the graph above it, in the area of minimal vessel lumen:
Hover the mouse cursor over the red line
Hold the left mouse button
Move the mouse left or right
Move the yellow linear cursor ("Control") on the longitudinal view to an obviously "normal" vessel lumen area:
Hover the mouse cursor over the yellow line
Hold the left mouse button
Move the mouse left or right
Using the scroll bar sliders on the cross-section panels, or by rotating the mouse wheel, scroll through the images
Adjust the cross-section lumen contour to exclude branching vessels and construction artifacts:
Hover the mouse over the contour, hold the left mouse button
Trace strictly along the outer lumen contour of the vessel, excluding construction artifacts
Release the left mouse button
Stenosis Calculation Results
The table (bottom left panel of the screen) displays the measurement results:
Maximum diameter
Minimum diameter
Cross-sectional area
Distance from the construction point
Difference between values (in percentage and mm)
Saving Results
Click the "Copy" button to copy the analysis results to the clipboard for subsequent pasting into a standard text document
Click the "Save" button to save the analysis results to a *.csv format file for subsequent analysis in MS Excel
Click the "Print" button to send the analysis results to a printer
If more than one vessel has been constructed, you can select another vessel for stenosis analysis without switching to the Vessel Construction mode
Click in the active overlay of the longitudinal view on another vessel from the list:
Selecting the Number of Projections
The number and type of longitudinal projections for constant display can be set in the Settings of the Vessels Program (see below)
Similar control of reconstructions and projections is available in the Vessel Construction mode
Hide/Show Contour and Diameters on Cross-Sections
In the "Vessels" Program panel, in Analysis mode, left-click on:
- hides/shows contours and diameters on cross-sections
- hides/shows only diameters on cross-sections
Useful Tips
When measuring on cross-sections, hide the cursors (press the key on the keyboard) so they don't interfere
After construction, restore them to the screen in the same way
When editing a cross-section contour, enlarge the panel by double-clicking on it, or by clicking the icon in the upper right corner of the panel
After editing, restore its size in the same way
- hides/shows contours and diameters on cross-sections
- hides/shows only diameters on cross-sections
key on the keyboard) so they don't interfere
icon in the upper right corner of the panel