Table 2.
Qualitative results of conventional reading (Likert score ± standard deviation), number of artifacts, diagnostic sequences and results from Wilcoxon signed rank test. After correction for multiple comparisons (Bonferroni correction, n = 3 to account for all body phased-array receive coil setups) a p-value <0.017 was considered statistically significant.
| T2W-TSE |
p-value |
DWI |
p-value |
||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 18CH | 30CH | 60CH | 18CH vs. 30CH | 18CH vs. 60CH | 30CH vs. 60CH | 18CH | 30CH | 60CH | 18CH vs. 30CH | 18CH vs. 60CH | 30CH vs. 60CH | ||||||
| Resolution | R1 | 4.3 ± 0.7 | 3.9 ± 1.1 | 4.1 ± 0.7 | 0.102 | 0.414 | 0.527 | 4.1 ± 0.7 | 4.2 ± 0.6 | 4.2 ± 0.6 | 0.564 | 0.655 | 1 | ||||
| R2 | 4.6 ± 0.7 | 4.4 ± 0.8 | 4.7 ± 0.5 | 0.414 | 0.655 | 0.317 | 4.4 ± 1.0 | 4.1 ± 0.9 | 4.3 ± 0.7 | 0.180 | 0.564 | 0.414 | |||||
| Capsule demarcation | R1 | 4.8 ± 0.4 | 4.4 ± 0.8 | 4.8 ± 0.4 | 0.102 | 1 | 0.102 | 4.7 ± 0.5 | 4.4 ± 1.0 | 4.5 ± 0.7 | 0.180 | 0.157 | 0.564 | ||||
| R2 | 4.8 ± 0.4 | 4.6 ± 0.5 | 4.9 ± 0.3 | 0.157 | 0.564 | 0.083 | 4.8 ± 0.6 | 4.2 ± 0.9 | 4.6 ± 1.0 | 0.063 | 0.157 | 0.234 | |||||
| Zonal anatomy | R1 | 4.0 ± 0.8 | 3.9 ± 1.1 | 4.2 ± 0.8 | 0.705 | 0.480 | 0.257 | 4.2 ± 0.8 | 3.9 ± 0.7 | 3.8 ± 0.8 | 0.257 | 0.046 | 0.705 | ||||
| R2 | 4.4 ± 0.7 | 4.6 ± 0.5 | 4.8 ± 0.4 | 0.317 | 0.102 | 0.480 | 4.6 ± 1.0 | 4.0 ± 1.2 | 4.3 ± 1.1 | 0.034 | 0.180 | 0.180 | |||||
| Overall IQ | R1 | 4.3 ± 0.7 | 4.3 ± 1.1 | 4.4 ± 0.7 | 1 | 0.564 | 0.655 | 4.2 ± 0.8 | 4.1 ± 0.7 | 3.9 ± 0.9 | 0.655 | 0.180 | 0.480 | ||||
| R2 | 4.6 ± 0.7 | 4.3 ± 0.8 | 4.7 ± 0.5 | 0.180 | 0.655 | 0.102 | 4.4 ± 0.8 | 4.3 ± 0.7 | 4.5 ± 0.7 | 0.705 | 0.739 | 0.157 | |||||
| Periurethral clarity | R1 | 4.4 ± 0.7 | 4.3 ± 1.1 | 4.5 ± 0.7 | 0.739 | 0.655 | 0.317 | ||||||||||
| R2 | 4.7 ± 0.5 | 4.7 ± 0.7 | 4.9 ± 0.3 | 1 | 0.317 | 0.414 | |||||||||||
| Geometric distortion | R1 | 1.6 ± 1.0 | 2.0 ± 1.1 | 1.7 ± 1.1 | 0.194 | 0.705 | 0.334 | ||||||||||
| R2 | 1.7 ± 0.9 | 1.7 ± 0.9 | 2.3 ± 1.6 | 1 | 0.131 | 0.206 | |||||||||||
| Number of artifacts | R1 | 5 | 6 | 8 | 0.564 | 0.180 | 0.317 | ||||||||||
| R2 | 4 | 5 | 5 | 0.655 | 0.655 | 1 | |||||||||||
| Artifacts influencing diagnostic evaluation | R1 | 1.3 ± 0.9 | 1.6 ± 1.1 | 1.4 ± 1.0 | 0.414 | 0.317 | 0.705 | ||||||||||
| R2 | 1.2 ± 0.6 | 1.5 ± 1.1 | 1.3 ± 0.9 | 0.180 | 0.317 | 0.317 | |||||||||||
| Artifacts influencing IQ | R1 | 1.8 ± 1.2 | 2.2 ± 1.3 | 2 ± 0.8 | 0.336 | 0.414 | 0.739 | ||||||||||
| R2 | 1.6 ± 1.0 | 1.8 ± 1.0 | 1.7 ± 1.1 | 0.414 | 0.705 | 0.739 | |||||||||||
| Diagnostic (yes/no) | R1 | 10/0 | 9/1 | 10/0 | 0.317 | 1 | 0.317 | 9/1 | 9/1 | 9/1 | 1 | 1 | 1 | ||||
| R2 | 10/0 | 10/0 | 10/0 | 1 | 1 | 1 | 10/0 | 10/0 | 10/0 | 1 | 1 | 1 | |||||
Abbreviations: T2W-TSE, T2-weighted turbo spin echo; DWI, diffusion weighted images; 18CH, 18-channel body phased-array receive coil setup; 30CH, 30-channel body phased-array receive coil setup; 60CH, 60-channel body phased-array receive coil setup; R1, reader 1; R2, reader 2; IQ, image quality.