Fig 1.
Designed phantom used in this study.
Table 1.
Results of mean and standard deviation (M±SD) CT numbers, paired t-test results, and absolute percentage differences between the CT numbers of each substitute material obtained from the scanner and CorePLAN treatment planning system at each energy (kVp).
Table 2.
Results of mean and standard deviation (M±SD) CT numbers, paired t-test results, and absolute percentage differences between the CT numbers of each substitute material obtained from the scanner and MIRS treatment planning system at each energy (kVp).
Fig 2.
Variations in mean CT numbers among different energies of scanner (kVp) at the scanner and two treatment planning systems (CorePLAN and MIRS) for various tissue-equivalent materials.
Fig 3.
Mean CT number values of CT scanner, CorePLAN, and MIRS treatment planning systems at the same energy (kVp) for various tissue-equivalent materials.
Fig 4.
CT number variations according to change of kVp for different materials.
Table 3.
P-values resulted from the CT number variations of each substitute material with changing energy.
Table 4.
Calculated doses of CorePLAN on the center of the scanned phantom at three kVp's of scanner using 6 and 15 MV photon beams.
Table 5.
Calculated doses of MIRS on the center of the scanned phantom at three kVp's of scanner using 6 and 15 MV photon beams.