Terminology.Numbers indicate anatomical strustures in fig.5.1-5.2.
1 - Right lateral thyroid lobe.
2 - Left lateral thyroid lobe.
3 - Thyroid isthmus.
4 - Upper pole of the lateral thyroid lobe.
5 - Lower pole of the lateral thyroid lobe.
6 - Anterior surface of the lateral thyroid lobe - part of thyroid tissue adjacent to sternothyroid muscle, sternohyoid muscle and omohyoid muscle.
7 - Posterior surface of the lateral thyroid lobe - part of thyroid tissue adjacent to the prevertebral fascia.
8 - Lateral border - part of thyroid tissue between anterior and posterior surfaces.
9 - Medial border - part of thyroid tissue adjacent to the inferior constrictor muscle of the pharynx, cricothyroid mus-cle, trachea and esophagus.
10 - Height of the thyroid lobe - distance between the poles.
11 - Depth of the thyroid lobe - distance between the most prominent points of anterior and posterior surfaces.
12 - Width of the thyroid lobe - distance between the most prominent points of lateral and medial borders.
13 - Scanning step - ultrasound probe shift between two adjacent transverse sections.
14 - Reconstructed two-dimensional image of the thyroid gland - two-dimensional image obtained on the base of lobe width, depth and scanning step parameters.
 

Fig.5.1. Terminology. Reconstructed two-dimensional images of the thyroid gland. A - right lateral view - projection on the sagittal plane. B - anterior view - projection on the frontal plane. C - posterior view - projection on the fron-tal plane. The images are 80% of the scale 1:1. Horizontal lines show the level of transverse section. Numbers indi-cate anatomical structures in fig.5.1-5.2. Signs. 15 - musculus constrictor pharyngis inferior, 16 - cartilago thyroidea, 17 - cartilago cricoidea, 18 - oe-sophagus, 19 - trachea.
 











Fig. 5.2. Terminology. Pictograms. Echograms of the thyroid gland. Schematic representations of the echograms. Horizontal line in pictograms shows the level of transverse section.
Section No. 1 - at the level of the upper poles of thyroid gland.
Section No. 2 - at the level of the isthmus initial part.
Section No. 3 - at the middle level of the isthmus.
Section No. 4 - at the level of the lower poles of thyroid gland.