B-K Medical Pro Focus 2202, Руководство пользователя

Страница: 305 / 356

3D Imaging 305
Making Measurements in a Cube View
In a Cube view, you can measure the length, area and volume of a pathology, if you
have used a computer-controlled positioning device to acquire the data set. (You
cannot make accurate measurements on data sets acquired using untracked freehand.
See the warning on page 293.)
NOTE: Making measurements on a 3D cube is not the same as making
measurements on a 2D image, as described in Chapter 5, “Making
Measurements”. After you have clicked to position a point to make a 3D
measurement, you cannot move the point. You can only complete the
measurement (if it requires more points) and then delete the measurement and
make a new one.
To make a 3D measurement:
1 Click the type of measurement you want under Measurements on the right side
of the screen.
2
Click to position the points of the measurement. See Table 20-5.
When you click (or double-click, in the case of a polygon) the final point for the
measurement, a number appears next to the lines you have drawn. The number
is used to label the measurement results.
The results appear under Measurements on the left side of the screen.
Table 20-5. Measurements on a 3D data set.
Measurement
Type What to Do Result
Distance Click to position 2 points. A line
connects them. Distance between the points.
Angle Click to position 3 points. Two
intersecting lines appear. Angle between the lines.
Area Click points on the perimeter of the
area. A polygon appears. The number
of sides in the polygon increases with
each click. When you have come to the
last point, double-click to indicate that it
is the final point in the polygon. You
must click the points in order so that the
polygon does not intersect itself – see
note below. Area of the polygon.
Volume See instructions on page 306. Volume calculated from
polygons drawn on slices of
the volume.