a novel dual energy ct-based attenuation correction method in pet/ct systems: a phantom study

in present pet/ct scanners, pet attenuation correction is performed by relying on the information given by ct scan. in the ct-based attenuation correction methods, dual-energy technique (dect) is the most accurate approach, which has been limited due to the increasing patient dose. in this feasibility study, we have introduced a new method that can implement dual-energy technique with only a single energy ct scan. the implementation was done by ct scans of rando phantom at tube voltages of 80 kvp and 140 kvp. the acquired data was used to obtain conversion curves (which scale ct numbers at different kvp to each other), in three regions including lung tissue (hu