Evaluation of bulk-density-assigned CT images derived from MRI of intracranial regions for radiation treatment

Fig 1. Schematic illustration of the procedures.Fig 2. Acquired MR and CT image sets and generated synthetic CT image sets. (a) T1-weighted MR image. (b) T2-weighted MR image. (c) PETRA MR image. (d) original CT image. (e) Water-equivalent synthetic CT (WCT). (f) Bulk-density-assigned CT image (BCT). Fig 3. Gamma analysis between the original CT image and resultant synthetic CT images. (a) original CT image. (b) Water-equivalent synthetic CT (WCT). (c) Bulk-density-assigned CT image (BCT). (d) Gamma analysis between the original CT and WCT with 3 mm/3% criteria. (e) Gamma analysis between the original CT and WCT with 2 mm/2% criteria. (f) Gamma analysis between the original CT and WCT with 1 mm/1% criteria. (g) Gamma analysis between the original CT and BCT with 3 mm/3% criteria. (h) Gamma analysis between the original CT and BCT with 2 mm/2% criteria. (i) Gamma analysis between the original CT and BCT with 1 mm/1% criteria.Raw evaluated-data sets for statistical analysis in this study.