Chison Q9 - 5.3.1.2. Cardiology Measurement in B mode

Q9 Digital Color Doppler Ultrasound System
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5.3.1.2. Cardiology Measurement in B mode
1. Single Plane
This method calculates the left ventricular volumes by using the 2D-mode long-axis image.When the left ventricle is
traced and its long axis is specified on a 2D-mode cross-sectional image, this method allows the system to
automatically divide the long axis into 20 segments to calculate the volume of the left ventricle as the 2D-mode cross-
sectional image is rotated.
Calculation formula for volume
EDV=π
Errore. L'origine riferimento non è stata trovata.i
2
ESV=π
Errore. L'origine riferimento non è stata trovata.i
2
ri: Radius of the i-th circle
LVLd: Left ventricular long-axis length at end diastole
LVLs: Left ventricular long-axis length at end diastole
<<Items to be measured>>
Meas. item name
Description [Unit]
Meas. method
EDV（A4C）
End
-
diastolic volume
(A4C)[ml]
Measurement
(
trace)
ESV（A4C）
End
-
systolic volume
(A4C )[ml]
Measurement
(
trace)
<< Items to be calculated >>
Calc. item name
Description [Unit]
Calc. formula
SV
Stroke Volume[mL]
SV=EDV
–
ESV
EF
eject
ion fraction
EF=SV/EDV
2. BiPlane
This method allows the volume of the left ventricle to be calculated by repeating “Simpson SP method” on two 2D-
mode cross-sectional images (two-chamber and four-chamber cross-sectional images).
Calculation is also possible for only two-chamber cross-sectional images or only four-chamber cross- sectional
images.
Calculation formula for volume
(1)EDV=πErrore. L'origine riferimento non è stata trovata.(r
2i
r
4i
)
(2)ESV=πErrore. L'origine riferimento non è stata trovata.(r
2i
r
4i
)
r
2i
:Radius of i-th ellipse(2CH)