<s>
Chromoendoscopy	B-Algorithm
is	O
a	O
medical	O
procedure	O
wherein	O
dyes	O
(	O
often	O
the	O
same	O
stains	O
used	O
in	O
histology	O
)	O
are	O
instilled	O
into	O
the	O
gastrointestinal	O
tract	O
at	O
the	O
time	O
of	O
visualization	O
with	O
fibre-optic	O
endoscopy	B-Application
.	O
</s>
<s>
The	O
purposes	O
of	O
chromoendoscopy	B-Algorithm
is	O
chiefly	O
enhance	O
the	O
characterization	O
of	O
tissues	O
,	O
although	O
dyes	O
may	O
be	O
used	O
for	O
other	O
functional	O
purposes	O
.	O
</s>
<s>
The	O
detail	O
achieved	O
with	O
chromoendoscopy	B-Algorithm
can	O
often	O
allow	O
for	O
identification	O
of	O
the	O
tissue	O
type	O
or	O
pathology	O
based	O
upon	O
the	O
pattern	O
uncovered	O
.	O
</s>
<s>
Stains	O
used	O
in	O
chromoendoscopy	B-Algorithm
have	O
three	O
major	O
mechanisms	O
.	O
</s>
<s>
The	O
most	O
common	O
applications	O
for	O
chromoendoscopy	B-Algorithm
are	O
the	O
following	O
:	O
identification	O
of	O
squamous	O
cell	O
carcinomas	O
or	O
dysplasia	O
of	O
the	O
esophagus	O
,	O
identification	O
of	O
Barrett	O
's	O
esophagus	O
and	O
dysplasia	O
,	O
identification	O
of	O
early	O
gastric	O
cancer	O
,	O
characterization	O
of	O
colonic	O
polyps	O
and	O
colorectal	O
cancer	O
,	O
and	O
in	O
screening	O
for	O
dysplasia	O
in	O
individuals	O
with	O
ulcerative	O
colitis	O
.	O
</s>
<s>
The	O
dyes	O
used	O
for	O
chromoendoscopy	B-Algorithm
are	O
typically	O
considered	O
to	O
be	O
safe	O
.	O
</s>
<s>
Stains	O
can	O
be	O
used	O
in	O
conjunction	O
with	O
other	O
techniques	O
that	O
allow	O
for	O
better	O
identification	O
of	O
mucosa	O
,	O
such	O
as	O
magnification	O
endoscopy	B-Application
.	O
</s>
<s>
Narrow-band	B-Algorithm
imaging	I-Algorithm
is	O
a	O
technique	O
where	O
ambient	O
light	O
of	O
a	O
blue	O
and	O
green	O
wavelengths	O
are	O
used	O
to	O
highlight	O
detail	O
,	O
particularly	O
of	O
vascular	O
structures	O
.	O
</s>
<s>
A	O
similar	O
technique	O
to	O
narrow-band	B-Algorithm
imaging	I-Algorithm
using	O
blue	O
and	O
green	O
filters	O
has	O
been	O
used	O
in	O
endoscopes	B-Application
manufactured	O
by	O
Fujinon	O
,	O
termed	O
Fuji	O
Intelligent	O
Chromoendoscopy	B-Algorithm
(	O
FICE	O
)	O
,	O
and	O
has	O
been	O
referred	O
to	O
as	O
virtual	O
chromoendoscopy	B-Algorithm
.	O
</s>
<s>
Other	O
techniques	O
that	O
can	O
enhance	O
detail	O
of	O
mucosa	O
include	O
confocal	O
microscopy	O
,	O
magnification	O
endoscopy	B-Application
and	O
optical	B-Application
coherence	I-Application
tomography	I-Application
.	O
</s>
