tvpjournal.com | November/December 2015
ABDOMINAL ULTrASONOGrAPHy
27
the dynamic range (increase contrast)
or use a B color map, wherein shades
of a color (blue, yellow, magenta) are
used rather than grayscale (Figure 7,
page 28).
IN SUMMARY
Image optimization is not complicated,
but may be daunting for the new
sonographer due to unfamiliarity
with the controls and terminology.
FIGURE 6. Three images from the same view of the US phantom: Dynamic
range decreased (50 dB), resulting in too much contrast (A); dynamic range
set in a midrange position (70 dB), resulting in appropriate appearance (B);
dynamic range increased (90 dB), providing too much grayscale and not
enough contrast resolution (C).
A
B
C