. 2016 Jan 8;17(1):49–61. doi: 10.1120/jacmp.v17i1.5527

Table 3.

Effect on the laser alignment accuracy when the gantry CHL was shifted by 3.0 mm.

Laser Position On Both Walls ^b (mm)

Alignment Method

CHL Position Error (mm)

b‐a (Fig. 4(b))

Conventional method ^a

57.5

9.0

- 48.5 (\sim 2 \times 28 d)

Proposed method

39.3

38.8

‐0.5

^{^a}

A high‐accuracy level with the resolution of 0.44 mm/1,000 mm was used.

^{^b}

The value was averaged over three measurements.