 | The
MPR
window
doesn’t
show
the
source
data,
it
shows
3D
structure
slices.
That
is
why
tweening
errors
may
occur |
| | As
the
images
in
MinIP,
MIP,
and
AIP
modes
are
the
results
of
original
images
processing,
tweening
errors
may
occur.
The
measurements
performed
in
these
modes
may
be
erroneous |
| | The
measurement
accuracy
is
up
to
one
screen
pixel.
As
a
screen
pixel
is
smaller
than
a
source
image
pixel,
the
true
linear
measurement
accuracy
is
up
to
one
source
image
pixel.
Errors
may
also
occur
in
density
measurements.
The
most
accurate
measurements
are
performed
with
bilinear
interpolation
(see
Section 5.3) |
| | The
MPR
mode
is
not
meant
to
be
used
for
PET
studies,
use
the
specialized
module
(see
Section 8). |
| | Errors
may
occur
when
intensity
is
measured
in
a
certain
point.
In
this
case,
the
intensity
value
will
be
marked
by
an
asterisk.
For
accurate
measurements,
use
the
bilinear
interpolation
filter
(see
Section 5.3). |
The measurements are conducted in the same way as for flat images (Section 2.17).
In the MPR reconstruction tab, the ruler for making measurements in cutting planes windows
and in the 3D view window is activated with the Ruler 
button on the toolbar or from the
context menu.
Additionally, the Polygonal ruler 
tool is available in the MPR reconstruction tab. For
details on how to work with this tool, see Section 3.11.2.
