Fig. 5
Correlation between the evaluated metrics and lesion size. (a) The reference ADC value (0.5 × 10⁻³ mm²/s) is shown as a red dashed line. Even though ADC values from the EPI sequences deviate more from the reference value with increasing lesion size, they show enhanced ADC accuracy compared to the TGSE-BLADE-DWI across all lesion sizes. (b) All sequences exhibit a strong positive correlation between SNR and lesion size, with the most pronounced effect observed in the ss-EPI-DWI sequence. (c) Incorporating SIGM in the CNR calculation constantly yields a strong correlation with lesion size for TGSE-BLADE-DWI. The two EPI sequences exhibit a markedly lower correlation between CNR and lesion size, suggesting relatively consistent performance across the full range of lesion sizes. (d) Although EPI sequences exhibit marginally better contrast for smaller lesions, TGSE-BLADE-DWI shows a positive correlation between ReCon and lesion size, indicating enhanced contrast for larger lesions. (e) All sequences demonstrate reduced geometric distortion with increasing lesion size, with considerable reductions observed only for rs-EPI-DWI and TGSE-BLADE-DWI.
