Users Manual Part 1

Clinical User’s Guide
IBA | 6-7|
Volume 1 - Treatment Session
|Part II
- Using Treatment Room Equipment Elementary Notions on Patient Positioning
|
Figure 6-4. Zero position of the TTCS
Note: PPS positions are always displayed according to the TTCS.
Note: Auto PPS motions are managed in such a way that movement along all
involved axes is synchronized. As such, the PPS trajectory is not defined in TTCS
terms.
Note: PPS Manual movements follow the HTTCS
1
for translations along the X, Y
and Z axes as well as for top rotation.
1. The Horizontal Table Top Coordinate System (HTTCS) is equivalent to the
IEC 61217 patient support coordinate system and as its name indicates, it
always remains horizontal. In the Proton Therapy System, it is used instead of
the TTCS for the execution of Manual PPS motions. This enables lateral (X) and
longitudinal (Y) motions to be horizontal displacements of the table top even if
there is a pitch or roll of the table. If the TTCS was used instead, as it is
stationary with respect to the table, lateral (X) motions would be executed on
the plane of the current roll angle and longitudinal (Y) motions on the plane of
the current pitch angle.
Height: 400 mm
Width: 500 mm
Length: 1200 mm
100 mm
250 mm
500 mm
TCP=ETV Center
PPS
Couplers
side