Table 5 Subjective evaluation of FBP 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

1.9 ± 0.1*

2.7 ± 0.1

2.9 ± 0.1

2.9 ± 0.1

3.0 ± 0.1

Small vessel

1.8 ± 0.1*

2.5 ± 0.1*

2.8 ± 0.1

3.0 ± 0.1

3.3 ± 0.1

Bronchiectasis

2.6 ± 0.0*

2.9 ± 0.0

3.0 ± 0.0

3.0 ± 0.0

3.0 ± 0.0

Ground-glass Opacity

2.5 ± 0.1*

2.8 ± 0.1

2.9 ± 0.1

3.1 ± 0.1

3.1 ± 0.1

Reticulation

1.8 ± 0.1*

2.7 ± 0.1

3.0 ± 0.1

3.1 ± 0.1

3.1 ± 0.1

Nodule

2.7 ± 0.1

3.0 ± 0.1

3.0 ± 0.1

3.2 ± 0.1

3.0 ± 0.1

Noise

5.0 ± 0.1*

4.6 ± 0.1*

4.0 ± 0.1*

3.6 ± 0.1

3.5 ± 0.1

Streak artifact

3.7 ± 0.1

3.8 ± 0.1*

4.0 ± 0.1*

3.4 ± 0.1

3.5 ± 0.1

Overall image Quality

1.1 ± 0.1*

1.8 ± 0.2*

2.4 ± 0.1

2.8 ± 0.1

2.8 ± 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 FBP 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 points.
  3. *There was a significant difference between FBP and 175-mAs-FBP (p < 0.005).
Back to article page