Lunar DPX-IQ, Operator'S Manual, Page: 128 / 166

G-12 Orthopedic Hip DPX-IQ Operator’s Manual
Figure G-13. Extended Gruen analysis ROIs
G.3.6 Offset, Perimeter, and Rim Options
At the Auto Analysis screen, select
)
to access the Offset, Perimeter, and Rim
options from the Profiles screen.
The Offset, Perimeter and Rim options let you isolate BMD values for regions of bone
next to the implant. When you set these values, the BMD values given at the Bone
Results screen are calculated for areas between the Offset, Perimeter, and Rim edge
markers instead of the area between the bone edge markers.
Set an Offset Value
The Offset option sets the distance from the implant to the bone region. For example,
if you select an Offset value of 4 mm, the program shows a set of edge markers 4 mm
from the implant.
1. At the Profiles screen, select
'
. The number following “Offset =” below the line
profile is highlighted in green.
2. Record the necessary distance (0–10mm) from the Offset edge markers to
the implant.
3. Select
0
to save changes. The program shows the offset edge markers.
Set a Perimeter Value
The Perimeter option sets the width of the bone region. When you set this value, the
program shows a set of edge markers the distance you selected from the Offset
edge markers.
1. At the Profiles screen, select
(
. The number following “Perimeter =” below the line
profile is highlighted in green.
2. Record the width (0–10mm) necessary for the bone region.
3. Select
0
. The program shows a set of edge markers the distance you specified
from the Offset edge markers.