Diameter ROI

The Diameter Region of Interest (ROI) is the portion of the image where the diameter is calculated. The edges of the vessel obtained by the algorithm of edge detection are displayed within the ROI. The ROI can be moved and/or resized. Each time you change the position and/or size of the ROI, the contours of the vessel are re-initialized.

Draw a new Diameter ROI:

• Click on the Set B-Mode ROI button in the B-Mode Panel (the button remains active).
• Click inside the video window and drag until the Diameter ROI is complete (the size of the ROI is shown in the B-Mode Panel).
• When you release the mouse, the contours are initialized.

Modify the Diameter ROI:

• Click on one of the sides or one of the corners of the Diameter ROI.
• Drag to change the size of the the Diameter ROI.

NOTE: an alternative, you can modify the size of the Diameter ROI by typing the value in the B-Mode Panel.

Move the Diameter ROI:

• Click and hold inside the Diameter ROI.
• Drag the Diameter ROI to the location of interest.

NOTE: as an alternative, you can modify the position of the Diameter ROI by typing the value in the B-Mode Panel.

Re-initialize the edge detection algorithm:

• Click on the Diameter ROI.