Fig.51. Ultrasound criteria of goiter. 51.1.Diagram of conventional normal and enlarged thyroid volumes for persons of different sex, age, weight, height, and body surface area. 51.2. Schematic representations of transverse echograms of the normal and enlarged thyroid gland. 51.3. Reconstructed two-dimensional images of the normal and enlarged thyroid gland. A - Anterior view - projection on the frontal plane. B - Right lateral view - projection on sagittal view. 51.4. Histograms of the optical density of the normal and enlarged thyroid gland tissue.