Discrimination of PTAs from the thyroid gland and cervical lymph nodes using ADCs
The PTAs exhibited relatively high signal intensity on DW-MRI with either SS-EPI or RS-EPI, with high ADC values. On SS-EPI, the average ADC values of the PTAs, thyroid glands, and cervical lymph nodes were 1.44, 1.07, and 0.80 × 10−3 mm2/s, respectively, and a significant difference between the PTAs and lymph nodes was observed. Moreover, the average ADC values of the PTAs, thyroid glands, and cervical lymph nodes were 1.67, 1.46, and 0.95 × 10−3 mm2/s on RS-EPI, and the PTAs exhibited significantly higher ADC values compared to those of the thyroid glands and lymph nodes (Fig. 3).