<s>
PET	B-Algorithm
radiotracer	I-Algorithm
is	O
a	O
type	O
of	O
radioligand	O
that	O
is	O
used	O
for	O
the	O
diagnostic	O
purposes	O
via	O
positron	B-Application
emission	I-Application
tomography	I-Application
imaging	O
technique	O
.	O
</s>
<s>
PET	O
is	O
a	O
functional	B-Algorithm
imaging	I-Algorithm
technique	O
that	O
produces	O
a	O
three-dimensional	O
image	O
of	O
functional	O
processes	O
in	O
the	O
body	O
.	O
</s>
<s>
In	O
addition	O
,	O
since	O
via	O
the	O
PET	B-Application
imaging	I-Application
technique	O
is	O
desired	O
to	O
investigate	O
a	O
function	O
accurately	O
,	O
the	O
selectivity	O
of	O
bindings	O
to	O
the	O
specific	O
targets	O
is	O
very	O
important	O
.	O
</s>
