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Table 1 Comparison of lesion conspicuity between filtered back projections and iterative reconstructions

From: CT of the chest with model-based, fully iterative reconstruction: comparison with adaptive statistical iterative reconstruction

 

Standard-dose CT with FBP

Low-dose CT with FBP

Low-dose CT with ASIR

Low-dose CT with MBIR

Consolidation or mass

4.9 ± 0.2

4.7 ± 0.6

4.8 ± 0.4

4.9 ± 0.2

Ground-glass attenuation

5.0 ± 0.2

4.8 ± 0.4

4.8 ± 0.4

4.8 ± 0.4

Reticular opacity

5.0 ± 0

4.9 ± 0.4

5.0 ± 0

5.0 ± 0

Decreased lung attenuation (bulla, emphysema, or cyst)

4.9 ± 0.2

4.5 ± 0.6 *§

4.6 ± 0.5 *§

4.9 ± 0.2

Mediastinal lymph node enlargement

4.8 ± 0.4

3.0 ± 0.5 *§

4.0 ± 0.5 *§

4.7 ± 0.5

  1. CT Computed tomography, FBP Filtered back projection, ASIR Adaptive statistical iterative reconstruction, MBIR Model-based iterative reconstruction.
  2. The comparisons of lesion conspicuity scores were made by the Wilcoxon signed-rank test. * refers to statistically significant differences with standard-dose FBP CT (* p < 0.05). § refers to statistically significant differences with low-dose MBIR CT (§ p < 0.05).