GE LOGIQ 500 Advanced Reference Manual page 159

Vascular Calculation Formulas (cont'd)
Calc
Mnemonic
Rt ICA/CCAd Right Internal Carotid Artery
Velocity/Common Carotid Artery
Rt ICA/CCAs Velocity Ratio
Rt VERT Right Vertebra Artery
Velocity, systole
Rt SUBC Right Subclavian Artery
Velocity, systole
Rt PI Right Pulsatility Index
Rt RI Right Resistivity Index
Rt S/D Ratio Right Systolic Velocity/Diasto-
lic Velocities Ratio
Rt A/B Ratio Right side Velocities Ratio
Same as above, Same as above, but for Left Ca-
but for Left Carotid rotid Artery
Artery
*NOTE*: V
diastole
Table 4–29. Advanced Vascular Calculation Formulas (cont'd)
LOGIQ 500 Advanced Reference Manual
2276614–100 Rev. 0
Calc Name
two Doppler blood flow
peak velocities
one Doppler blood flow
peak velocity
one Doppler blood flow
peak velocity
two Doppler blood flow
peak velocities and TAMAX
two Doppler blood flow
peak velocities
two Doppler blood flow
peak velocities
two Doppler blood flow
peak velocities
Same as above
= V or V
min end–diastole
Advanced Vascular
Input
Measurements
(depends on preset selection)
Formula
RT XICA/XCCA=
Vx /Vx
ICA CCA
RT VERT=v1
[cm/s or m/s]
RT SUBC=v1
[cm/s or m/s]
Rt PI=(V –V )/
max diastole
TAMAX *NOTE*
Rt RI=(V –V )/
max diastole
*NOTE*
V
max
Rt S/D=V /V
systole diastole
*NOTE*
Rt A/B=V /V
1 2
Same as above
4–113