Biomedical Engineering Reference
In-Depth Information
FIGURE 6.1
Schematic of point-based registration illustrating two measures of error. Black circles rep-
resent positions
q
in one space. The unfilled circles represent positions
p
in the other space
i
i
after they have been mapped by the registering transformation
T
. The numbered positions
are points used in the registration. Target registration error
(TRE) is the registration error at a
point not used to effect the registration fiducial registration error
(FRE) is the alignment
error between points used to effect the registration.
FIGURE 6.2
Schematic of point-based registration illustrating fiducial localization error
(FLE). Black circles
represent positions
at which points are localized in one of two spaces involved in the regis-
tration process. The dashed circles represent the actual positions. The black circles represent the
position chosen by the localization process.
q
