Design Analysis and Experimental Study of Robotic Chair for Proton Heavy Ion Radiotherapy

Table 3

The adjustment parameter of chin positioning block.

Position		Proximal low point	Proximal high point	Distal low point	Distal high point
Calculating coordinates		(0, 165.0, 145.0)	(0, 165.0, 162.0)	(0, 235.0, 145.0)	(0, 235.0, 162.0)
Location description		Chin positioning block at the proximal low point	Chin positioning block at the proximal high point	Chin positioning block at the distal low point	Chin positioning block at the distal high point
Measurement diagram
Measuring coordinates		(1.5, 167.0, 143.5)	(-1.5, 167.5, 161.0)	(1.0, 234.5, 143.0)	(0.5, 235.0, 160.5)
Error (mm)		1.5	-1.5	1.0	0.5
		2.0	2.5	-0.5	0
		1.5	-1.0	-2.0	-1.5