An Investigation of Calibration Phantoms for CT Scanners with Tube Voltage Modulation
Figure 7
Dual-material calibration phantoms and corresponding correction images of FORBILD head phantom. The first row shows dual-material calibration phantom with different sizes. (a) A 14 × 12 cm oval water phantom with a 1.5 × 1.0 cm bone insert. (b) A 14 × 12 cm oval water phantom with 4 × 2 cm bone insert. (c) A 14 × 12 cm oval water phantom with 5 × 3 cm bone insert. (d), (e), and (f) are correction images of FORBILD head phantom using calibration phantoms shown in (a), (b), and (c).
