Comparison of spatial accuracy between aortic arch and cervical level (group 1) and the distal cervical level (group 2)
| Spatial Accuracy | Group 1 No. (%) | Group 2 No. (%) | Overall No. (%) |
|---|---|---|---|
| Accurate | 85 (92.4) | 43 (72.9) | 128 (84.8) |
| Mismatch/inaccurate | 7 (7.6) | 16 (27.1) | 23 (15.2) |