Absorbed doses modified by exposure settings with rotational panoramic radiography

Absorbed doses to parotid gland, cervical vertebrae and thyroid gland were measured with various exposure settings of the tube voltage and tube current during use of rotational panoramic radiographs , Veraview (J. Morita Corp., Kyoto, Japan) and PM 2002 CC (Planmeca Oy, Helsinki, Finland) using Rando phantom and thermoluminescence dosimeters. The magnitude of each absorbed dose was greatest in the parotid gland, followed in order by the cervical vertebrae and thyroid gland and was proportional to tube current. The increase of the thyroid gland absorbed dose with increasing tube voltage was steeper than were the increases in the absorbed doses in either the parotid gland or the cervical vertebrae.