Table 4 Subjective evaluation of TFI compared to 175-mAs-FBP: CT findings.

From: The evaluation of the reduction of radiation dose via deep learning-based reconstruction for cadaveric human lung CT images

Tube current–time products (mAs)

Score

10

25

50

75

100

Bronchi

2.3 ± 0.1*

2.9 ± 0.1

3.0 ± 0.1

3.0 ± 0.1

3.3 ± 0.1*

Small vessel

2.6 ± 0.1*

3.7 ± 0.1*

3.8 ± 0.1*

4.0 ± 0.1*

4.3 ± 0.1*

Bronchiectasis

2.9 ± 0.0

3.0 ± 0.0

3.2 ± 0.0*

3.1 ± 0.0

3.4 ± 0.0*

Ground-glass Opacity

2.8 ± 0.1

3.2 ± 0.1

3.1 ± 0.1

3.0 ± 0.1

3.2 ± 0.1

Reticulation

2.5 ± 0.1*

3.2 ± 0.1

3.7 ± 0.1*

3.6 ± 0.1*

3.7 ± 0.1*

Nodule

3.1 ± 0.1

3.0 ± 0.1

3.0 ± 0.1

3.0 ± 0.1

3.1 ± 0.1

Noise

4.0 ± 0.1*

3.0 ± 0.1

2.8 ± 0.1

2.2 ± 0.1*

2.0 ± 0.1*

Streak artifact

4.0 ± 0.1*

3.5 ± 0.1

2.8 ± 0.1

2.3 ± 0.1

2.3 ± 0.1

Overall image Quality

2.5 ± 0.1

3.4 ± 0.2

3.8 ± 0.1*

3.8 ± 0.1*

4.0 ± 0.1*

  1. Scores are presented as mean ± SD. Scores were statistically analyzed using two-way ANOVA and the Bonferroni test as post-hoc test to compare the scores of TFI images at five different tube current–time products (10-, 25-, 50-, 75-, and 100-mAs) with the scores of 175-mAs-FBP images.
  2. Scores of 175-mAs-FBP are 3 point.
  3. *There was a significant difference between TFI and 175-mAs-FBP (p < 0.005).
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