Users Manual Part 1

IBA | 6-6 | Clinical User’s Guide
Volume 1 - Treatment Session
|Part II - Using Treatment Room Equipment Elementary Notions on Patient Positioning |
 the origin is the center of the treatment volume (see page 7-6), 10 cm above the
table top in the Z direction (this distance may vary depending on the table used),
on the median of the table that is parallel to its long axis in the X direction, and
85 cm to the front of the physical rotation axis of joint 6 in the Y direction. As a
result, the origin of the TTCS is defined in such a way that, when the center of
the treatment volume of the table top is placed at the origin of the FRS, then the
origin of the TTCS is overlaid with the origin of the FRS.
Figure 6-3. Table Top Coordinate System (TTCS)
Note: TTCS does not comply with IEC 61217 for following points:
 Zero position is not the one defined in IC61217 for Y and Z axis. Zero
position of TTCS is defined so that the TCP (as shown in Figure 6-4) is at
isocenter.
 Pitch and roll are between [-180°;180°] instead of [0°;360°]
X
t
Y
t
Z
t
10 cm
85 cm