5.4 Measurement
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5.4.2 Basic Measurement Items List
Basic measurement items for each mode are as follows:
z
List of Measurement Items for B-mode
For details, refer to "2D-mode Measurement" of the "Operation Manual: Applications".
Measurement item Functions
[Distance] Calculates the distance between two points.
[Trace Length] Calculates the distance between two points with a curve.
[Area]
[Trace] Calculates the area surrounded by a trace line drawn on the screen.
[Ellipse] Calculates the area of an ellipsoid.
[Cross]
Calculates the area of a circle centering on two lines intersecting at
a right angle.
[Spline] Calculates the area of points on the screen by the spline method.
[Angle]
Calculates the angle between two intersecting lines that you have
selected.
[Hip Angle]
Specifies the base line, bony roof line and cartilaginous roof line
and calculates the angles α and β formed by the three lines.
Volume
[1Pl 2Distance] Calculates the volume of a sphere by: circle multiplied by distance.
[2Pl 3Distance]
Calculates the volume of an oval sphere by finding length/width/
height.
[1Pl Disc]
Calculates the volume of an oval sphere by summing the volumes
of 20 disks (columna pillar).
[1Pl Ellipse] Calculates the volume of an oval sphere based on elliptic integrals.
[2Pl Ellipse] Calculates the volume of an oval sphere from two sets of ellipses.
[2Pl Trace]
Calculates the volume of an oval sphere from two sets of traced ar-
eas/distances.
%Stenosis
[A-%Stenosis]
Compares two areas and calculates the proportion of the result of
subtraction of the smaller area from the larger area to the larger
area.
[A2-%Stenosis]
Compares two areas and calculates the proportion of the result of
subtraction of the smaller area from the larger area to the larger
area, using Ellipse and Trace measurement.
[D-%Stenosis]
Compares two lines and calculates the proportion of the result of
subtraction of the shorter line from the longer line to the longer line.
A/B Ratio
[Dist Ratio] Calculates ratio of two distances.
[Area Ratio] Calculates ratio of two areas.
[Vol Ratio] Calculates ratio of two volumes.
Flow Volume
[D-Flow Vol. (Semi-Auto)]
Calculates the ow volume at a certain point by the area obtained
from two distances and the average velocity.
[A-Flow Vol. (Semi-Auto)]
Calculates the ow volume at a certain point from the area and the
average velocity.
[D-Flow Vol. (Manual)]
Calculates the ow volume at a certain point by the area obtained
from two distances and the average velocity.
[A-Flow Vol. (Manual)]
Calculates the ow volume at a certain point from the area and the
average velocity.