Multiplanar Neck CT

Figure 1

History: 62-year-male with goiter. Pre-operative evaluation.

Technique: Multiplanar CT of the neck was performed on a 16-detector spiral CT during the dynamic injection intravenous contrast. Images were obtained with 0.75 mm collimation (slices) with reconstruction of 2D and 3D images in multiple planes.

Figure 2

Findings: Conventional axial image (figure 1) shows a right lobe thyroid mass (M) and a small isthmus nodule (arrow). On the coronal image (figure 2), displacement of the trachea (T) and right carotid artery/jugular vein (red arrow) by the mass (M) is seen. 3D CT angiography/venography of the neck (figure 3) also shows the displacement of the right common carotid artery and internal jugular vein (arrow). Curved planar reformatted image in the frontal projection (figure 4) shows the entire thyroid gland (M = masss; L = left lobe; I = insthmus nodule).

Figure 3

Discussion: Neck CT's at Main Street Radiology are performed with sub-millimeter slices, enabling mutiplanar 2D and 3D reconstructions. Due to the thin slices, nearly "isotropic" volume acquisition is obtained, which enable high-resolution images to be generated in any plane. Multiplanar imaging can be helpful in defining anatomy, especially for surgical planning. This includes high-resolution imaging of the laryngeal cartilage (yellow arrows on Figure 2) which was previously not possible with routine CT exams.

At Main Street Radiology, multiplanar CT imaging is routinely performed in the head and neck region, including the soft tissues of the neck, temporal bones, and sinuses. Multiplanar imaging is also utilized in many other areas, including the liver, kidneys, pancreas, and extremities.

Figure 4