Siemens SOMATOM Spirit, Руководство оператора, Страница: 156 / 484

0.0
0.0
Patient Table System Description
B.3-6 SOMATOM Spirit
0.0
Working principle
B.3
The height adjustment mechanism of the patient table works
on a principle called the cobra principle. Like the snake of that
name, the horizontal position of the tabletop (“head of the
cobra”) changes as it is raised or lowered.
B.3
❏
On raising, the table top (and therefore the patient too)
moves toward the gantry.
❏
On lowering both move away from the gantry.
The usual working height corresponds to the isocenter of the
system.
B.3
i
.3 B
Do not change the table height during the examination,
because it alters the slice position too.
B.3
Limit values
B.3
The table top can be lowered to approximate 500 mm above the
floor level (for example, during patient positioning).
B.3
B
.3 B
The limiting values for the vertical and horizontal table setting
and the angle of inclination of the gantry are interdependent.
B.3
Before you can lower the patient table to its minimum height,
you must retract the table top entirely and set the gantry verti-
cal.
B.3
Always ensure that the movement is not obstructed by any
objects.
B.3
Do not place any objects underneath the patient table!
B.3