Figure 2.

Color Doppler mode used before needling to identify major vessels. (a) Thyroid gland (b) carotid artery (c) internal jugular vein (d) vertebral artery (e) transverse process of C7

Color Doppler mode used before needling to identify major vessels. (a) Thyroid gland (b) carotid artery (c) internal jugular vein (d) vertebral artery (e) transverse process of C7