The analyzed results for 26 patients.

For each patient, and for each CT slice, the mean and maximum motions at each direction—left-right (LR), anterior-posterior (AP), and superior-inferior (SI)—and the total motion magnitudes were calculated. Then, for each patient, the maximum values of these mean and maximum motions over all slices were calculated and presented in this table. The mean and standard deviation (SD) were calculated for all 26 patients as well. Because the motion in SI direction was not reliable and difficult to validate, we also reported the motion in the transverse (Axial) direction without taking into account the SI motion.