こう頭Ｐａｎｔｏｍｏｇｒａｐｈｙの試み

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タイトル別名
  • Pantomography of the Larynx and Hypopharynx
  • コウトウ Pantomography ノ ココロミ

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説明

In order to avoid the vertebral image obscuring the routine A-P view of the laryngeal region, a technique of pantomography using TOSLAYER TR-840 (Toshiba) was applied for the examination of the larynx and hypopharynx. A preliminary study on an excised human larynx revealed that the laryngeal image was exposed on a laminographic plane of an elliptic shape. In the case of living human subjects, the vertebra appeared on the marginal portion of the film, the pyriform sinus in the median and the glottis in the center. The exposure dosage was estimated by the TLD method (KYOKKO). Taking the exposure dosage for 10 slices of conventional laryngeal tomography as 100, the dosage for a single exposure of pantomography (rotatory angle 270°, 20 second) was 18 on the cervical skin surface and 16 at the orbit.

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