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The N-localizer is depicted by rods 
, 
, and 
that intersect a non-tilted tomographic section at fiducial points 
, 
, and 
. The rods also intersect a tomographic section that is tilted by the angle 
at fiducial points 
, 
, and 
. The distance between points 
and 
is 
. The distance between points 
and 
is 
.
