Optimizing the Image
Versana Essential
–
User Guide
2-7
5759238-100 English
Rev. 2
Spatial Filter
No
Smooths out the color, makes it look less pixely.
Flash Suppression
No
Activates/deactivates Flash Suppression, a motion artifact
elimination process.
Packet Size
Yes
Controls the number of samples gathered for a single color flow
vector.
Sample Volume
Yes
Adjusts the size of the color flow doppler transmit wave (or pulse)
and size (or length). Lower setting gives better flow resolution and
a higher setting increases sensitivity.
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 (Option)
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.
QAnalysis (Option)
No
QAnalysis is available for the image loop acquired in the following
modes: TVI, CF and PDI. All of the QAnalysis modes operate
similarly, with some variation.
Table 2-3: Color Flow Mode Controls (continued)
Control
Bioeffect
Description/Benefit
