Figure 4
Comparison of SR-PBI-HCT and SR-PBI-CT (gray scale: 0–255); (a1) SR-PBI-HCT image, (b1) SR-PBI-CT image, (c1) SR-PBI-CT image with low-pass Fourier filtering and (d1) SR-PBI-CT image with Sarepy sorting. (a2)–(d2) corresponding gray value profiles of ROIs at red line positions. |