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Insights into Imaging
Fig. 3 | Insights into Imaging

Fig. 3

From: Performance of dual-layer spectrum CT virtual monoenergetic images to assess early rectal adenocarcinoma T-stage: comparison with MR

Fig. 3

Contrast-enhanced axial arterial phase in 66-year-old female with T2 stage rectal adenocarcinoma. VMI 40–200 keV of arterial phase shows that tumor SNR, tumor CNR, and tumor contrast increases as the energy level decreases. The highest SNR, CNR, and tumor contrast were obtained on the VMI 40 keV, followed by 50 and 60 keV. There was no difference in the SNR, tumor contrast among VMI 40, 50, and 60 keV. The best image quality, tumor visibility, and tumor delineation were obtained at VMI 40 keV

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