Value of susceptibility weighted imaging in differential diagnosis of benign and maliagnant thyroid lesions / 实用放射学杂志

ABSTRACT

Objective To evaluate the value of differential diagnosis between benign and malignant thyroid lesions by susceptibility weighted imaging(SWI).Methods 53 patients with 20 malignant thyroid lesions and 71 benign thyroid lesions confirmed by surgery and pathology were analyzed retrospectively.All cases received conventional MRI and SWI preoperatively.Location,volume,SWI parameters including signal to noise ratio(SNR),contrast noise ratio(CNR)and intratumor susceptibility hypointensity (ITSHIA)datas in benign and malignant lesions were compared and analyzed.Results There was no statistical significance between benign and malignant thyroid lesions in the location,volume,SNR and CNR(χ2 or t =0.014,0.286,0.927,1.169;P =0.907,0.778,0.368,0.259 respectively).The maximum diameter (1.90 mm±0.32 mm),degree of maximum diameter(1.33±0.47),frequence(1.40±0.20)and area ratio(1.09±0.28)for benign thyroid lesions were less than those for malignant lesions(3.39 mm±0.79 mm,2.25±0.44,1.40±0.68,1.70±0.47)respectively (t or Z =12.629,5.788,3.41 5,5.795;P =0.000,0.000,0.001,0.000).Conclusion SWI semiquantitative assessment of pathlogical vascularity is useful in differential diagnosis of benign and malignant thyroid lesions.