Table 3. Quantitative parameters of PTC and benign thyroid nodules.
| MRI sequence | PTC (n=41) | Benign (n=36) | P value |
|---|---|---|---|
| SIR | |||
| Axial T1WI | 1.26±0.17 | 1.19±0.15 | 0.095 |
| Axial T2WI | 2.75±0.80 | 2.69±1.14 | 0.815 |
| ADC (×10−3 mm2/s) | 1.22±0.37 | 1.98±0.48 | <0.001 |
| MD (×10−3 mm2/s) | 1.56±0.47 | 2.42±0.53 | <0.001 |
| MK | 0.88±0.21 | 0.62±0.17 | <0.001 |
The SIR was calculated for each sequence as a ratio of signal intensity of the thyroid nodule to that of the paraspinal muscle. Data are means ± standard deviation. PTC, papillary thyroid carcinoma; MRI, magnetic resonance imaging; SIR, signal intensity ratio; T1WI, T1-weighted imaging; T2WI, T2-weighted imaging; ADC, apparent diffusion coefficient; MD, mean diffusivity; MK, mean kurtosis.