<s>
Optical	B-Algorithm
tomography	I-Algorithm
is	O
a	O
form	O
of	O
computed	O
tomography	O
that	O
creates	O
a	O
digital	B-General_Concept
volumetric	O
model	O
of	O
an	O
object	O
by	O
reconstructing	O
images	O
made	O
from	O
light	O
transmitted	O
and	O
scattered	O
through	O
an	O
object	O
.	O
</s>
<s>
Optical	B-Algorithm
tomography	I-Algorithm
is	O
used	O
mostly	O
in	O
medical	B-Application
imaging	I-Application
research	O
.	O
</s>
<s>
Optical	B-Algorithm
tomography	I-Algorithm
in	O
industry	O
is	O
used	O
as	O
a	O
sensor	O
of	O
thickness	O
and	O
internal	O
structure	O
of	O
semiconductors	O
.	O
</s>
<s>
Optical	B-Algorithm
tomography	I-Algorithm
relies	O
on	O
the	O
object	O
under	O
study	O
being	O
at	O
least	O
partially	O
light-transmitting	O
or	O
translucent	O
,	O
so	O
it	O
works	O
best	O
on	O
soft	O
tissue	O
,	O
such	O
as	O
breast	O
and	O
brain	O
tissue	O
.	O
</s>
<s>
In	O
near-infrared	O
diffuse	B-Algorithm
optical	I-Algorithm
tomography	I-Algorithm
(	O
DOT	O
)	O
,	O
transmitted	O
diffuse	O
photons	O
are	O
collected	O
and	O
a	O
diffusion	O
equation	O
is	O
used	O
to	O
reconstruct	O
an	O
image	O
from	O
them	O
.	O
</s>
<s>
A	O
variant	O
of	O
optical	B-Algorithm
tomography	I-Algorithm
uses	O
optical	O
time-of-flight	O
sampling	O
as	O
an	O
attempt	O
to	O
distinguish	O
transmitted	O
light	O
from	O
scattered	O
light	O
.	O
</s>
<s>
Confocal	O
diffuse	O
tomography	O
uses	O
a	O
powerful	O
laser	O
to	O
illuminate	O
a	O
sample	O
through	O
a	O
scattering	O
medium	O
,	O
followed	O
by	O
deconvolution	B-Algorithm
with	O
a	O
calibrated	O
diffusion	O
operator	O
to	O
estimate	O
a	O
volume	O
without	O
the	O
effects	O
of	O
diffusive	O
scattering	O
and	O
subsequent	O
application	O
of	O
a	O
confocal	O
inverse	B-Application
filter	I-Application
to	O
recover	O
the	O
sample	O
image	O
.	O
</s>
