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Measure an Image

Measure an Image

The measuring tools calculate distances and areas on a still image or paused frame of a loop that you identify. The measurements and calculations can be saved to the Worksheet.

  • Length: Allows the user to measure length along a straight line.
  • Angle: Allows the user to measure an angle.
  • Elliptical ROI: Allows the user to measure an elliptical area.
  • Rectangular ROI: Allows the user to measure a rectangular area.
  • Custom Polygon ROI: Allows the user to define and measure the area of a custom polygon.
  • Delete Measurements: Deletes measurements from the item in the viewing pane.
  • Measurement Calibration: Allows the user to calibrate manually if an item does not have the necessary calibration information from the modality.
  • Calculations: Allows the user to take measurements that the software will use to calculate velocity, pressure gradient, pressure half time, velocity time integral, ejection fraction, and time on Doppler images. For more information, see Generate Calculations.

If an image does not contain the necessary calibration information from the modality, you must calibrate manually before you can take any measurements. For calibration instructions, see Calibrate Manually.

Measure Length

In the measurement tools menu to the left of the viewing pane, select the Length tool.

  1. Click the point in the image where you want the distance measurement to begin.
  2. Move the cursor to draw a line across the distance you want to measure.
  3. Click to define the end point of the line. The distance is displayed next to the line.

Measure an Angle

In the measurement tools menu, select the Angle tool.

  1. Click to place the angle on the image. The measurement is displayed in degrees next to the angle.
  2. To move the sides of the angle, click a handle and drag it.

NOTE: It is possible to separate the sides of the angle so that they no longer meet in a point. This option allows for greater flexibility in measuring angles. To separate the sides, grab and drag the handle at the vertex.

Measure Area

To measure the area of a region of interest (ROI), select Elliptical, Rectangular, or Custom Polygon ROI.

  1. Draw your shape.
  • Elliptical ROI: Use this option to draw an oval or circle. Click on the image and use your cursor to draw. To adjust the shape, click and drag the handles.
  • Rectangular ROI: Use this option to draw a rectangle or square. Click on the image and use your cursor to draw. To adjust the shape, click and drag the handles.
  • Custom Polygon ROI: Use this option to draw a custom shape. Click to define the first corner. Move the cursor to the location of the next corner and click again. Click once for each corner of the shape. Double click to close the shape.
  1. The area is displayed next to the shape.

Delete Measurements

To delete measurements,

  1. Select the tool for the type of measurement you want to delete (Length, Angle, Elliptical ROI, Rectangular ROI, or Custom Polygon ROI).
  2. Click the Delete Measurements button.
  3. Click on each measurement you want to delete.

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