<s>
The	O
RadBall	B-Algorithm
is	O
a	O
diameter	O
deployable	O
,	O
passive	O
,	O
non-electrical	O
gamma	O
hot-spot	O
imaging	O
device	O
that	O
offers	O
a	O
360	O
degree	O
view	O
of	O
the	O
deployment	O
area	O
.	O
</s>
<s>
The	O
device	O
has	O
been	O
developed	O
by	O
the	O
UK	O
's	O
National	O
Nuclear	O
Laboratory	O
and	O
consists	O
of	O
an	O
inner	O
spherical	O
core	O
made	O
of	O
a	O
radiation	O
sensitive	O
material	O
and	O
an	O
outer	O
tungsten	B-Application
based	O
collimation	O
sheath	O
.	O
</s>
<s>
The	O
device	O
consists	O
of	O
two	O
constituent	O
parts	O
,	O
a	O
gamma	O
radiation	O
sensitive	O
inner	O
core	O
which	O
fits	O
inside	O
the	O
spherical	O
tungsten	B-Application
outer	O
collimation	O
sheath	O
.	O
</s>
<s>
These	O
tracks	O
can	O
then	O
be	O
analysed	O
to	O
provide	O
a	O
3D	B-Application
visualisation	I-Application
of	O
the	O
radioactive	O
environment	O
predicting	O
both	O
source	O
location	O
and	O
intensity	O
.	O
</s>
<s>
This	O
can	O
be	O
achieved	O
in	O
a	O
number	O
of	O
ways	O
including	O
deployment	O
by	O
crane	O
,	O
robot	B-Algorithm
,	O
by	O
an	O
operator	O
or	O
(	O
as	O
in	O
most	O
cases	O
)	O
by	O
a	O
remotely	O
operated	O
manipulator	O
arm	O
.	O
</s>
<s>
Step	O
6	O
involves	O
the	O
interpretation	O
of	O
this	O
data	O
set	O
to	O
produce	O
a	O
final	O
visualisation	B-Application
.	O
</s>
<s>
If	O
two	O
devices	O
are	O
deployed	O
in	O
different	O
locations	O
within	O
the	O
same	O
deployment	O
area	O
,	O
triangulation	B-Algorithm
can	O
be	O
used	O
to	O
predict	O
where	O
along	O
the	O
extrapolated	O
line	O
the	O
radiation	O
source	O
is	O
.	O
</s>
<s>
This	O
particular	O
project	O
involved	O
the	O
deployment	O
of	O
three	O
devices	O
and	O
represents	O
the	O
first	O
instance	O
in	O
which	O
triangulation	B-Algorithm
was	O
demonstrated	O
.	O
</s>
