抄録
Images of the larynx from various points of view were obtained by computer graphics. For reconstructing the three-dimensional structures of the larynx, both nondecalcified serial cross sections of the normal larynx, made by polyester resin embedding technique, and CT scan films of the pathological larynx were used. Following digitization of each slice, the X and Y coordinates were standardized and the Z coordinates were calculated. Then each structure (laryngeal cartilages, muscles, membrane and so on) was drawn shading the hidden structures. This graphic technique demonstrated clearly the whole image of the normal larynx, the spatial relationship between the lumen and the thyroid gland flap of the hemi-laryngectomized larynx, and the difference of the vocal fold level of the paralyzed larynx. The finer cross sections will make it possible to understand the fine structures, such as that of the arytenoid cartilage, when this method of computer graphics is used.
