<s>
Breast	B-Algorithm
ultrasound	I-Algorithm
is	O
a	O
medical	O
imaging	O
technique	O
that	O
uses	O
medical	B-Application
ultrasonography	I-Application
to	O
perform	O
imaging	O
of	O
the	O
breast	O
.	O
</s>
<s>
In	O
particular	O
,	O
breast	B-Algorithm
ultrasound	I-Algorithm
may	O
be	O
useful	O
for	O
younger	O
women	O
who	O
have	O
denser	O
fibrous	O
breast	O
tissue	O
that	O
may	O
make	O
mammograms	O
more	O
challenging	O
to	O
interpret	O
.	O
</s>
<s>
It	O
utilizes	O
high-frequency	O
ultrasound	O
to	O
help	O
perform	O
a	O
diagnostic	O
evaluation	O
of	O
the	O
lactiferous	O
ducts	O
(	O
duct	O
sonography	B-Application
)	O
and	O
make	O
dilated	O
ducts	O
and	O
intraductal	O
masses	O
visible	O
.	O
</s>
<s>
Elastography	B-Algorithm
is	O
a	O
type	O
of	O
ultrasound	O
examination	O
that	O
measures	O
tissue	O
stiffness	O
and	O
can	O
be	O
used	O
to	O
detect	O
tumours	O
.	O
</s>
<s>
Breast	B-Algorithm
ultrasound	I-Algorithm
is	O
also	O
used	O
to	O
perform	O
fine-needle	O
aspiration	O
biopsy	O
and	O
ultrasound-guided	O
fine-needle	O
aspiration	O
of	O
breast	O
abscesses	O
.	O
</s>
<s>
Women	O
may	O
prefer	O
breast	B-Algorithm
ultrasound	I-Algorithm
over	O
mammography	O
because	O
it	O
is	O
a	O
painless	O
procedure	O
and	O
does	O
not	O
involve	O
the	O
discomfort	O
of	O
breast	O
compression	O
present	O
in	O
mammograms	O
.	O
</s>
<s>
Breast	B-Algorithm
ultrasound	I-Algorithm
is	O
typically	O
performed	O
using	O
a	O
frequency	O
of	O
7	O
to	O
14	O
Megahertz	O
,	O
and	O
may	O
also	O
include	O
ultrasound	O
of	O
the	O
axillary	O
tail	O
of	O
the	O
breast	O
and	O
axillae	O
to	O
detect	O
abnormal	O
nodes	O
in	O
the	O
axilla	O
,	O
as	O
lymphatic	O
drainage	O
of	O
parts	O
of	O
the	O
breast	O
occurs	O
through	O
axillary	O
lymph	O
nodes	O
.	O
</s>
