GE LOGIQ A100, Technical Publication

Page: 132 / 408

Basic Measurements
116
LOGIQ
t α
100 User Manual
2211157–100 Rev 0
Measurement of Volume by approximation to a Spheroid (Three
Distance Method)
This formula is suited for anatomical structures that are
arbitrarily shaped and do not conform to radial or bilateral
symmetries.
Pre Selection
Using the
LEFT/RIGHT keys scan and obtain a section
of the organ in a B/B image. For details of using the B/B
image please refer page 71.
Measure its long and short axes by distance method.
OR
Construct an ellipse to approximate its outline.
Turn the probe through 90
°
and obtain another section.
Press the RIGHT/LEFT keys to freeze in the second B/B
image. For details refer page 71.
Measure the third axis.
OR
Construct an ellipse to approximate the outline.
NOTE: Of the two axes of the second ellipse displayed
on measurement area on the side, ensure that the third
axis is always on the left. To swap the axes press
measurement key.
Select 2. The volume is calculated and displayed in the
calculation result area. Distances d
1
,d
2
,d
3
used in
calculation are also displayed.
2
OR
OR
ÀÀ
ÀÀ
L
R
ÀÀ
ÀÀ
R
L