Clinical Characteristic of patients
| Clinical Characteristic of patients | Group without star artifact(n=386) | Group without star artifact(n=423) | P value |
| Age,year | 43.4±11.3 | 40.9±11.7 | 0.003 |
| Sex,male/female | 138/248 | 83/340 | 0.000 |
| PTC/FTC | 337/19 | 418/5 | 0.21 |
| T stage,T1/T2/T3/T4 | 251/31/56/38 | 273/41/62/47 | 0.847 |
| N stage,NO/N1a+N1b | 117/269 | 109/314 | 0.15 |
| Lymph node metastasis number(<5/>5) | 308/78 | 297/126 | 0.002 |
| TpoAb positive | 39(10.1%) | 80(18.9%) | 0.000 |
| TgAb positive | 34(9%) | 66(15.6%) | 0.003 |
| Thyroid static imaging positive | 332(86%) | 179(42.3%) | 0.000 |