Table 4: GTV centriod movement by different positional and attachment status.

Tumor locationMagnitude of solitary tumor (mean ± SD mm) = 14Magnitude of attached tumor (mean ± SD mm) = 30
LaterAPSI LaterAPSI

Upper level90.9 0.31.5 1.22.3 2.2200.9 0.51.2 0.71.5 1.7
Middle level12.65.211.771.5 0.72.1 0.92.2 1.3
Lower level4*2.5 1.92.7 1.510 4.831.5 0.91.5 0.73.0 1.9

This value included 3 cases whose lesions attached to diaphragm.
Upper level included right upper lobe, anterior, and apicoposterior segment in left upper lobe. Middle level included right middle lobe and lingular bronchus in left lobe. Lower level included left and right lower lobes.
SD: standard deviation; AP: anterior-posterior direction, and SI: superior-inferior direction.