Table 1 Results of the evaluation and comparison of the number of artifacts in the reconstructed images (EI = end inspiration; EE = end-expiration)
Breathing state-specific evaluation (max. inspiration to max. inspiration) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
EI | ← Expiration states → | EE | ←Inspiration states → | ||||||||
Reconstruction | Mean | 0% | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
Number of motion artifacts (mean ± standard deviation over patients) | |||||||||||
Phase-based (PB) | 4.8±2.2 | 5.8±2.9 | 5.2±2.8 | 5.2±2.4 | 4.1±2.5 | 3.7±2.6 | 3.7±2.3 | 4.3±2.6 | 5.4±2.4 | 5.6±2.4 | 5.4±2.9 |
Amplitude-based (LAB) | 4.6±2.1 | 5.8±2.6 | 5.2±2.4 | 4.9±2.6 | 4.6±2.6 | 3.7±2.4 | 3.6±2.1 | 4.0±2.5 | 4.5±2.3 | 4.5±2.3 | 5.0±2.8 |
Advanced recon. (AR) | 3.3±1.7 | 3.6±2.5 | 3.3±2.1 | 3.6±2.1 | 3.2±1.9 | 3.0±1.9 | 2.6±1.9 | 3.4±2.0 | 3.3±2.0 | 3.3±1.9 | 4.1±2.3 |
Average reduction of artifacts by first mentioned approach compared to second approach | |||||||||||
LAB vs. PB | 5.1% | −0.6% | 0.0% | 5.8% | −12.2% | 0.0% | 2.7% | 6.2% | 16.7% ∗ | 20.2% ∗ | 7.7% |
AR vs. LAB | 27.4% ∗ | 38.5% ∗ | 36.3% ∗ | 27.2% ∗ | 29.7% ∗ | 20.5% ∗ | 27.1% ∗ | 16.5% | 27.4% ∗ | 26.9% ∗ | 18.1% |
AR vs. PB | 31.1% ∗ | 38.2% ∗ | 36.3% ∗ | 31.4% ∗ | 21.1% ∗ | 20.5% | 29.1% ∗ | 21.7% ∗ | 39.5% ∗ | 41.7% ∗ | 24.4% ∗ |