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44 Measurements

Note: Trace measurements cannot be edited once

set.

To improve precision of caliper placement

 Do any of the following:

• Adjust the display for maximum sharpness.

• Use leading edges (closest to the

transducer) or borders for starting and

stopping points.

• Maintain a consistent transducer orientation

for each type of measurement.

• Make sure that the area of interest fills as

much of the screen as possible.

• (2D) Minimize the depth, or zoom.

2D measurements

The basic measurements that you can perform in

2D imaging are as follows:

•Distance in cm

•Area in cm

2

• Circumference in cm

You can also measure area or circumference by

tracing manually.

Figure 1 2D image with two distance and one

circumference measurement

You can perform a combination of distance, area,

circumference, and manual trace measurements at

one time. The total number possible depends on

their order and type.

To measure distance (2D)

You can perform up to eight distance

measurements on a 2D image.

1 On a frozen 2D image, press the

CALIPER key.

A pair of calipers appears, connected by a

dotted line.

2 Using the touchpad, position the first caliper,

and then press the

SELECT key.

The other caliper becomes active.

3 Using the touchpad, position the other caliper.

If you move the calipers close together, they

shrink and the dotted line disappears.

See “To save a measurement to a calculation

and patient report” on page 43.

To measure area or circumference (2D)

1 On a frozen 2D image, press the CALIPER key.

2 Select Ellipse on-screen.

Note: If you exceed the allowed number of

measurements, Ellipse is not available.

3 Use the touchpad to adjust the size and position

of the ellipse. The

SELECT key toggles between

position and size.

See “To save a measurement to a calculation

and patient report” on page 43.

To trace manually (2D)

1 On a frozen 2D image, press the CALIPER key.

2 Select Manual on-screen.

Note: If you exceed the allowed number of

measurements, Manual is not available.

3 Using the touchpad, position the caliper where

you want to begin.