Table 3.
Comparisons of DWI parameters in low risk (VNPC 1) vs. high risk (VNPC 2, 3) DCIS lesions.
| DWI Parameter | Low Risk DCIS mean ± SD |
High Risk DCIS mean ± SD |
P value |
|---|---|---|---|
|
ADC Values
Lesion ADC (mm2/s) Normalized ADC |
1.41 ± 0.33 × 10−3 75 ± 17 |
1.39 ± 0.24 × 10−3 87 ± 14 |
0.89 0.04* |
|
CNR
b = 800 s/mm2 b = 0 s/mm2 |
3.15 ± 2.33 1.27 ± 1.82 |
1.43 ± 1.58 0.75 ± 1.49 |
0.02* 0.39 |
Abbreviations: DWI: diffusion weighted imaging, VNPC: Van Nuys Pathological Classification, DCIS: ductal carcinoma in situ, ADC: apparent diffusion coefficient, CNR: contrast-to-noise ratio
*
Indicates statistical significance
P values calculated by ordinal logistic regression