GE Vivid S70, Руководство пользователя

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Measurements and Analysis
8-4
Vivid S70 / S60
–
User Manual
BC092760-1EN 01
General recommendations about measurements
• When doing time-measurements in Doppler or M-Mode, it is
recommended to freeze the 2D image during acquisition.
• Distance and area measurements should be done on
greyscale 2D images or slice mode images if in 4D, not on
color flow or TVI-based images. Similarly, in M-Mode,
distance measurements should be done on greyscale
M-mode images and not on color M-mode images. If doing
Color M-Mode measurements of propagation of flow, please
refer to your specific laboratory protocols.
About Measurement results display
Be aware of the following:
• Measurement results display
By default the system always displays absolute values for
parameters measured in Doppler. This means that values
from above and below baseline will all be displayed as
positive results.
For Cardiac this behavior cannot be changed. For
non-Cardiac the Absolute Value setting can be turned off in
Config -> Meas/Text -> Advanced , by setting the attribute
Absolute Value to Off .
• Calculated parameters
For calculated parameters the system uses signed values in
calculation formulas, and displays the absolute value of the
result.
• When a parameter is measured several times the individual
values for the parameter will be listed in the m1, m2...
columns in the worksheet. The
Value
column in the
worksheet will contain a derived value for the parameter,
e.g. the average of the individual values (Figure 8-1).
When calculating formula derived parameters, the m1, m2...
columns in the worksheet contain calculated values based
on the individual input parameter values in the same column
(Figure 8-1). The
Value
column contains calculated values
based on the input parameter values in the
Value
column.