Chapter 4
Page no. 332
Chap-Pre-Requirements.fm
GE Healthcare
Senographe DS
Revision 1
Service Information and Procedures Class A 2385072-16-8EN
Pre-Installation System Requirements
3.
NOISE
60 dBA at 1 m (
3’3”).
4.
STRUCTURAL REQUIREMENTS
4-1. Ceiling Requirements
The top of the Senographe system Tube Head can travel up to three different discrete maximum heights.
The Tube Head maximum height is determined by setting one of the three discrete
Lift Travel Limit
Ranges
on the Senographe system. Table 5 below summarizes the minimum ceiling height required cor-
responding to the three different Lift Travel Limit Ranges. Illustration 2 on
shows the dimen-
sions of the Gantry.
TABLE 5 - RECOMMENDED MINIMUM CEILING HEIGHTS
The distance between the plane of the Bucky and the top of the Tube Head is fixed at 935 mm
(36.81 inches). Table 5 also shows the corresponding maximum Bucky plane height for each of the
three different Lift Travel Limit Ranges. You must determine:
•
whether the maximum Bucky plane height corresponding to your ceiling height is acceptable for your
customer base
•
if you have to make appropriate allowances such as the use of chairs for tall patients
4-2. Wall Requirements
The hospital must take special precautions regarding X-ray protection in the examination room walls.
See
Planning for Radiation Protection
.
4-3. Floor Requirements
The Gantry and Control Station must be anchored to the floor. The Generator cabinet is normally placed
on the floor, but must be anchored in seismic areas. The floor must be stable and flat, and sufficiently
strong to accept masses as defined below without distortion beyond the tolerance given:
1. Gantry:
•
The worst case mass of the complete Gantry (with Stereotaxy option) is 418 kg
(921.5 lbs)
.
•
The bearing surface of the base plate is 0.42 m²
(4.52 sq. ft.)
.
•
The Gantry is provided with three or five anchoring points (refer to
Lift Travel Limit Range
Corresponding Tube Head
Height
Recomended Minimum
Ceiling Height *
Corresponding
Bucky Plane
Maximim Height
650 mm
2230 mm (87.80")
2300 mm (90.55")
1295 mm (50.98")
750 mm
2330 mm (91.73")
2400 mm (94.49")
1395 mm (54.92")
850 mm (default setting)
2430 mm (95.67")
2500 mm (98.43")
1495 mm (58.86")
* - The recommended minimum ceiling height assumes that there is a marginal gap of 70 mm between the top of
the Tube Head and the ceiling.
If necessary, you can reduce the marginal gap to 10 mm. The lowest possible ceiling that can accommodate a
Senographe system is therefore 2240 mm.
