GE 5478035, Basic Service Manual

Page: 98 / 167

GE LOGIQ F S
ERIES
D
IRECTION
5446617-100, R
EVISION
10 B
ASIC
S
ERVICE
M
ANUAL
4 - 22 Section 4-3 - General Procedure
CF/PDI Auto
Sample Volume Yes Set the default value at Utility -> Imaging -> CF Mode.
CF/PDI Focus
Depth Yes
CF/PDI Frequency Yes
CF/PDI Auto
Frequency Yes
CF/PDI Center
Depth Yes
PDI Yes Power Doppler Imaging (PDI) is a color flow mapping
technique used to map the strength of the Doppler signal
coming from the tissue rather than the frequency shift of
the signal. Using this technique, the ultrasound system
plots color flow based on the number of reflectors that are
moving, regardless of their velocity. PDI does not map
velocity, therefore it is not subject to aliasing.
TVI (Option) Yes Tissue Velocity Imaging (TVI) calculates and color-codes
the velocities in tissue. The tissue velocity information is
acquired by sampling of tissue Doppler velocity values at
discrete points.The information is stored in a combined
format with gray scale imaging during one or several
cardiac cycles with high temporal resolution.
TVD Yes TVD: Tissue Velocity Doppler: basing on TVI mode,
activate a sample volume of PW ventricular wall to get the
spectral information of the sample section.
Table 4-5 Color Flow Mode Controls
Control Possible Bioeffect Description/Benefit