<s>
Quantum	B-Algorithm
optical	I-Algorithm
coherence	I-Algorithm
tomography	I-Algorithm
(	O
Q-OCT	O
)	O
is	O
an	O
imaging	O
technique	O
that	O
uses	O
nonclassical	O
(	O
quantum	O
)	O
light	O
sources	O
to	O
generate	O
high-resolution	O
images	O
based	O
on	O
the	O
Hong-Ou-Mandel	O
effect	O
(	O
HOM	O
)	O
.	O
</s>
<s>
Q-OCT	O
is	O
similar	O
to	O
conventional	O
OCT	B-Application
but	O
uses	O
a	O
fourth-order	O
interferometer	O
that	O
incorporates	O
two	O
photodetectors	O
rather	O
than	O
a	O
second-order	O
interferometer	O
with	O
a	O
single	O
photodetector	O
.	O
</s>
<s>
The	O
primary	O
advantage	O
of	O
Q-OCT	O
over	O
OCT	B-Application
is	O
insensitivity	O
to	O
even-order	O
dispersion	O
in	O
multi-layered	O
and	O
scattering	O
media	O
.	O
</s>
<s>
The	O
principle	O
of	O
Q-OCT	O
is	O
fourth-order	O
interferometry	O
.	O
</s>
<s>
Compared	O
with	O
conventional	O
OCT	B-Application
,	O
Q-OCT	O
has	O
several	O
advantages	O
:	O
</s>
<s>
Similar	O
to	O
FD-OCT	O
,	O
Q-OCT	O
can	O
provide	O
3D	O
imaging	O
of	O
biological	O
samples	O
with	O
a	O
better	O
resolution	O
due	O
to	O
the	O
photon	O
entanglement	O
.	O
</s>
<s>
Q-OCT	O
permits	O
a	O
direct	O
determination	O
of	O
the	O
group-velocity	O
dispersion	O
(	O
GVD	O
)	O
coefficients	O
of	O
the	O
media	O
.	O
</s>
<s>
Although	O
Q-OCT	O
is	O
not	O
expected	O
to	O
replace	O
OCT	B-Application
,	O
it	O
does	O
offer	O
some	O
advantages	O
as	O
a	O
biological	O
imaging	O
paradigm	O
.	O
</s>
