<s>
The	O
algebraic	B-Algorithm
reconstruction	I-Algorithm
technique	I-Algorithm
(	O
ART	O
)	O
is	O
an	O
iterative	B-Algorithm
reconstruction	I-Algorithm
technique	O
used	O
in	O
computed	O
tomography	O
.	O
</s>
<s>
It	O
reconstructs	O
an	O
image	O
from	O
a	O
series	O
of	O
angular	O
projections	O
(	O
a	O
sinogram	B-Algorithm
)	O
.	O
</s>
<s>
Gordon	O
,	O
Bender	O
and	O
Herman	O
first	O
showed	O
its	O
use	O
in	O
image	B-Algorithm
reconstruction	I-Algorithm
;	O
whereas	O
the	O
method	O
is	O
known	O
as	O
Kaczmarz	B-Algorithm
method	I-Algorithm
in	O
numerical	O
linear	O
algebra	O
.	O
</s>
<s>
is	O
a	O
sparse	O
matrix	O
whose	O
values	O
represent	O
the	O
relative	O
contribution	O
of	O
each	O
output	O
pixel	O
to	O
different	O
points	O
in	O
the	O
sinogram	B-Algorithm
(	O
being	O
the	O
number	O
of	O
individual	O
values	O
in	O
the	O
sinogram	B-Algorithm
,	O
and	O
being	O
the	O
number	O
of	O
output	O
pixels	O
)	O
;	O
</s>
<s>
is	O
a	O
vector	O
representing	O
the	O
sinogram	B-Algorithm
.	O
</s>
<s>
Each	O
projection	O
(	O
row	O
)	O
in	O
the	O
sinogram	B-Algorithm
is	O
made	O
up	O
of	O
a	O
number	O
of	O
discrete	O
values	O
,	O
arranged	O
along	O
the	O
transverse	O
axis	O
.	O
</s>
<s>
A	O
further	O
development	O
of	O
the	O
ART	O
algorithm	O
is	O
the	O
simultaneous	O
algebraic	B-Algorithm
reconstruction	I-Algorithm
technique	I-Algorithm
(	O
SART	O
)	O
algorithm	O
.	O
</s>
