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Insights into Imaging

Table 2 Subjective image quality analysis

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

 

Image Quality

Tumor Visibility

Tumor Delineation

VMI 40 keV

   

 Arterial Phase

4.24 ± 0.43*

4.21 ± 0.51*

4.16 ± 0.57*

 Venous Phase

4.28 ± 0.45*

4.25 ± 0.49*

4.26 ± 0.17*

VMI 50 keV

   

 Arterial Phase

3.96 ± 0.51

3.80 ± 0.53

3.70 ± 0.55

 Venous Phase

3.92 ± 0.47

3.71 ± 0.54

3.67 ± 0.56

VMI 60 keV

   

 Arterial Phase

3.71 ± 0.54

3.67 ± 0.53

3.58 ± 0.50

 Venous Phase

3.72 ± 0.55

3.62 ± 0.51

3.52 ± 0.53

PEI

   

 Arterial Phase

2.18 ± 0.67

2.25 ± 0.61

2.22 ± 0.57

 Venous Phase

2.25 ± 0.64

2.22 ± 0.60

2.19 ± 0.56

  1. Data are shown in mean ± standard deviation
  2. VMI virtual monochromatic imaging, PEI polyenergetic image
  3. * indicates significant differences (p < 0.05) of VMI 40–60 keV compared to PEI
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