<s>
Optical	B-Algorithm
projection	I-Algorithm
tomography	I-Algorithm
is	O
a	O
form	O
of	O
tomography	B-Algorithm
involving	O
optical	O
microscopy	O
.	O
</s>
<s>
The	O
OPT	O
technique	O
is	O
sometimes	O
referred	O
to	O
as	O
Optical	O
Computed	O
Tomography	B-Algorithm
(	O
optical-CT	O
)	O
and	O
Optical	O
Emission	O
Computed	O
Tomography	B-Algorithm
(	O
optical-ECT	O
)	O
in	O
the	O
literature	O
,	O
to	O
address	O
the	O
fact	O
that	O
the	O
technique	O
bears	O
similarity	O
to	O
X-ray	O
computed	O
tomography	B-Algorithm
(	O
CT	O
)	O
and	O
single-photon	O
emission	O
computed	O
tomography	B-Algorithm
(	O
SPECT	O
)	O
.	O
</s>
<s>
It	O
is	O
in	O
many	O
ways	O
the	O
optical	O
equivalent	O
of	O
X-ray	O
computed	O
tomography	B-Algorithm
or	O
the	O
medical	O
CT	O
scan	O
.	O
</s>
<s>
However	O
,	O
essential	O
mathematics	O
and	O
reconstruction	O
algorithms	O
used	O
for	O
CT	O
and	O
OPT	O
are	O
similar	O
;	O
for	O
example	O
,	O
radon	B-Algorithm
transform	I-Algorithm
or	O
iterative	B-Algorithm
reconstruction	I-Algorithm
based	O
on	O
projection	O
data	O
are	O
used	O
in	O
both	O
medical	O
CT	O
scan	O
and	O
OPT	O
for	O
3D	O
reconstruction	O
.	O
</s>
<s>
Fluorescence	O
optical	B-Algorithm
projection	I-Algorithm
tomography	I-Algorithm
visualises	O
the	O
distribution	O
of	O
dyes	O
in	O
the	O
specimen	O
.	O
</s>
