Table 5.
Comparison of Image Quality between 1 mm DLR MRI and 3 mm Routine MRI.
| 1 mm DLR | 3 mm routine MRI | p value a | |
|---|---|---|---|
| Overall (n = 30) | |||
| SNR (mean ± standard deviation) | 308.9 ± 111.3 | 253.9 ± 91.9 | 0.04 |
| CNR b (mean ± standard deviation) | 154.1 ± 59.7 | 133.5 ± 62.4 | 0.19 |
| SNR ratio | 1.25 ± 0.34 | < 0.001 | |
| CNR ratio | 1.35 ± 0.85 | < 0.001 | |
| Post-treatment adenoma (n = 16) | |||
| SNR (mean ± standard deviation) | 283.3 ± 97.4 | 238.0 ± 79.7 | 0.01 |
| CNR b (mean ± standard deviation) | 136.7 ± 53.2 | 125.4 ± 49.4 | 0.19 |
| SNR ratio | 1.22 ± 0.31 | < 0.001 | |
| CNR ratio | 1.15 ± 0.36 | < 0.001 | |
| Pre-treatment adenoma (n = 14) | |||
| SNR (mean ± standard deviation) | 338.1 ± 122.2 | 272.3 ± 104.2 | 0.01 |
| CNR b (mean ± standard deviation) | 174.0 ± 62.4 | 142.8 ± 75.5 | 0.11 |
| SNR ratio | 1.29 ± 0.35 | < 0.001 | |
| CNR ratio | 1.57 ± 1.11 | < 0.001 | |
Bold values used for emphasizing only values below p value < 0.05.
1 mm DLR MRI = 1 mm slice thickness MRI with deep learning-based reconstruction, 3 mm routine MRI = 3 mm slice thickness MRI, SNR = signal-to-noise ratio, CNR = contrast-to-noise ratio.
ap value was calculated using paired contrast enhancement.
bCNR of tumour was measured in reference to the brain parenchyma (CNR of brain parenchyma) and normal pituitary gland (CNR of normal pituitary gland).