The tomographic features of the organ structures of the neck include transverse level anatomy, coronal tomography, and sagittal tomography.
1. Anatomical features at the transverse level: the main structures of the neck are under the cervical fascia, and the dividing line is the prevertebral fascia and the posterior pharyngeal space, which divides the main structures of the neck into the anterior and posterior parts, with the viscera and vascular nerves in the middle and on both sides of the anterior part, and the spinal region in the posterior part.
2. Anatomical features of coronal tomography: the larynx and pharynx are better displayed at the coronal level. The laryngeal cavity can be completely displayed. The mucosal wrinkles in the larynx; the pharynx can also be shown completely. The isthmus and lateral lobes of the thyroid gland cannot be displayed at the same level. The nerve trunks of the large cervical vessels are shown as longitudinal strips.
3. Sagittal anatomical features: at the mid-sagittal level and adjacent levels, the cervical segment of the spine is located in the median axis and is immediately anterior to the pharyngeal and esophageal necks; the laryngeal and tracheal necks are located in the most anterior direction, and the thyroid isthmus is attached to the anterior and lateral sides of the laryngeal and tracheal necks. From the mid-sagittal plane, the lateral lobes of the thyroid gland, the great vessels of the neck, and the nerve trunks are shown one by one.
In summary, the tomographic characteristics of the organ structures of the neck vary according to the site of observation.