Measurement and Analysis
328
Vivid S5/Vivid S6 User Manual
R2424458-100 Rev. 2
Figure 7-43: Gestational sac measurement
Measuring GS sequentially
1.
Scan and freeze an image of GS that you would like to
measure (use full screen).
2.
Activate M&A and select
GS
(Hellman).
3.
Measure the two diameters of the GS (as explained above).
The measurements will display on screen as
d1
and
d2
.
4.
Scan again to produce a view of a plane which is orthogonal
to the previous plane.
5.
Activate M&A and select
GS
(Hellman).
6.
Measure the GS diameter; this will be marked as
d3
.
After you complete the third distance measurement, the
system displays the
gestational sac
measurement in the
Results Window
. It displays the three diameters
d1
,
d2
and
d3
. In addition it shows the average diameter
GS
and
the corresponding estimated age.
Amniotic Fluid Index (AFI)
To calculate the
amniotic fluid index
, you make
measurements of the four quadrants of the uterine cavity. The
system adds these four measurements together to calculate
the Amniotic Fluid Index.
Note
: The four quadrants can be measured with distance
(caliper) or circumference (circle) measurements. Press the
appropriate AFI quadrant Top/Sub Menu key to toggle between
caliper and circle.
1.
Select
OB-2/3
, then
AFI(Moore)
located just under it.
The first distance measurement,
AFI-Q1
, is already
selected.
2.
Make a standard distance measurement for the first
quadrant:
• To position the active caliper at the start point, move the
Trackball.
Содержание Vivid S5
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Страница 30: ...Introduction 12 Vivid S5 Vivid S6 User Manual R2424458 100 Rev 2 ...
Страница 154: ...Basic scanning operations 136 Vivid S5 Vivid S6 User Manual R2424458 100 Rev 2 ...
Страница 250: ...Stress Echo 232 Vivid S5 Vivid S6 User Manual R2424458 100 Rev 2 ...
Страница 260: ...Contrast Imaging 242 Vivid S5 Vivid S6 User Manual R2424458 100 Rev 2 ...
Страница 420: ...Quantitative Analysis 402 Vivid S5 Vivid S6 User Manual R2424458 100 Rev 2 ...
Страница 508: ...Archiving 490 Vivid S5 Vivid S6 User Manual R2424458 100 Rev 2 ...
Страница 600: ...Peripherals 582 Vivid S5 Vivid S6 User Manual R2424458 100 Rev 2 ...
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