Table 1. Comparison in Detection Rate, Size, Location, Separation or Continuity, and Superior Extent of Thyroid Pyramidal Lobes on US and CT.
| Items | US | CT | P |
|---|---|---|---|
| Detection rate | 230 (39.5) | 276 (47.4) | 0.006 |
| Size | |||
| Length (mm) | 21.2 ± 10.5 | 23.5 ± 11.3 | 0.027 |
| AP diameter (mm) | 2.1 ± 1.6 | 2.4 ± 1.1 | < 0.001 |
| Transverse diameter (mm) | 6.1 ± 2.3 | 6.4 ± 2.5 | 0.297 |
| Volume (mm3) | 165.6 ± 211.5 | 221.6 ± 260.5 | < 0.001 |
| Location | 0.399 | ||
| Right | 61 (26.5) | 65 (23.6) | |
| Left | 108 (47.0) | 117 (42.4) | |
| Midline | 59 (25.7) | 90 (32.6) | |
| Bilateral | 2 (0.9) | 4 (1.4) | |
| Separation or continuity | 0.819 | ||
| Separation | 36 (15.7) | 42 (15.2) | |
| Continuity | 199 (84.3) | 246 (84.8) | |
| Superior extent | < 0.001 | ||
| Tongue base | 0 (0) | 3 (1.1) | |
| Hyoid bone | 20 (8.7) | 47 (17.0) | |
| Thyrohyoid membrane | 29 (12.6) | 52 (18.8) | |
| Thyroid cartilage | 186 (80.9) | 186 (67.4) |
Note.- Data are presented as mean ± standard deviation or as n (%). AP = anteroposterior, CT = computed tomography, US = ultrasonography