User's Manual

Table Of Contents
93
 inen
 Color/CPA Mode Image Controls
InnoSight Ultrasound System
P6992-4, EN, 16/12/6
In CPA (Color Power Angio) mode, low flow rate in small vessels are clearly observedColors are carried
out only to demonstrate the blood flow, but contain no velocity information, thus, offer no directional
information
2D  PW
M 


 
 
 
  TGC 
2D 


 


C6-2




2D







1






5
Figure 36CPA mode real-time scan
Both Color and CPA modes can work with other scan modes to form duplex and triplex modes
Adjusting Pulse Repetition Frequency (PRF)
Adjust the velocity range of the color flow display The maximum velocity range depends on the transducer
in use and the location of the sample volume Set the PRF high enough to prevent aliasing, and low enough
to provide adequate detection of slow blood flow Upon adjusting the PRF value, the velocity scale shown
on the Color/CPA wedge and the Wall Filter setting are changed accordingly
Touch Scale +/- to adjust the value
Adjusting Wall Filter (WF)
Reduce or eliminate unwanted low-frequency, high-intensity signals generated by movements of blood
vessel walls or by rapid movement of the transducer Set the wall filter high enough to ensure that the
Color Doppler flash artifacts from tissue or wall motion are not displayed, but low enough to display slow
flow The adjustable range of the Wall Filter value is related to the current PRF value
Touch Wall Filter +/- to adjust the value
Applying the Smoothing Filter
Reduce color noise by applying a smoothing filter to the image
Touch Smoothing +/- to adjust the value
Adjusting the Color Priority
Define the amount of color displayed over bright echoes, and help confine color within the vessel walls
Touch Priority +/- to adjust the value