How much accuracy do we actually gain ??
1SD
systematic [mm]
lat lng vrt
_________________________________________________________________________________________________________________
no imaging 3.7 3.3 3.5
no tolerance
1st fraction
3.7 3.3 3.4
tolerance of 5 mm
with NAL 1.5 1.6 1.6
Comparing no images at all to one image on first day: reduction of
the systematic uncertainty
Courtesy of Mirjana Josipovic, Rigshospitalet