FIGURE 5.

Normalized noise power spectrum demonstrated similar image noise texture between TNC and VNI images as indicated by comparable average and peak spatial frequencies. f_av = 0.21 mm⁻¹ and 0.22 mm⁻¹ and f_peak 0.16 mm⁻¹ and 0.16 mm⁻¹ for TNC and VNI, respectively.