Konica Minolta SONIMAGE HS2, Operation Manual

Page: 261 / 308

8 .2 Biopsy
261
Chapter 8
8 .2 .6 Simple Needle Visualiza-
tion
To improve the visibility of a biopsy needle, the Simple
Needle Visualization (SNV) feature analyzes bright-
ness patterns and changes, and enhances the display
of the biopsy needle on the B image .
WARNING •••••••••••••••••••••••••••••••••••••
• Needle may not be enhanced correctly .
– In some situations when the needle is adjacent to
a highly echogenic structure, an artifact may occur
causing that structure to become enhanced along
with the needle .
– As the enhancement depends on the image quality
of the B-mode image, the SNV feature may not
work as expected if the needle in the B-mode
image is not clear . This applies particularly when
the needle used is thin, the display depth is deep,
the insertion angle of the needle (refer to "8 .2 .8
Selection of Biopsy Bracket") is closer to vertical to
the transducer plane, or the ultrasound beam is off
the needle .
– Noise components other than the needle may be
enhanced due to the acoustic artifacts (multiple
reflections) produced by the needle . The level of
acoustic artifacts will be greater when the needle
is thick or the insertion angle is closer to parallel to
the transducer plane .
– The biopsy needle enhance display is likely to be
positionally displaced to some degree with respect
to the B-mode image .
– Noise components other than the needle may be
enhanced due to tissue movement . The needle
may not be enhanced well if it moves too fast or too
slow . It is not enhanced when it stops moving (when
the selected SNV type enhances movement) .
– If the needle in the image is short, it may be less
enhanced (when the selected SNV type enhances
continuous structure) .
– If a different direction from that of the inserted
needle is selected, the needle may be less
enhanced (when SNV Steer is selected) .
• When using the SNV feature, turn off the Color
Flow-, Power Doppler-, 2D-TDI- and SCF-mode and
enter the Split mode . Then, use the window with
needle enhancement as a guide to locate the biopsy
needle, and the one without the needle enhance-
ment as a basis for making your final decision.
• The use of a bracket is recommended with the
SNV function .
• The color of the needle enhancement can be
changed . Do not confuse it with an image of the
Color Flow-, Power Doppler-, 2D-TDI- and SCF-
mode .
•••••••••••••••••••••••••••••••••••••••••••••••••••••
IMPORTANT •••••••••••••••••••••••••••••••••••••
• To use the Simple Needle Visualization function,
"the Simple Needle Visualization License" is re-
quired . Contact your service representative for de-
tails .
• The Simple Needle Visualization function cannot
be used if the active screen is in Elastography-
mode .
•••••••••••••••••••••••••••••••••••••••••••••••••••••