Related Content

More Like This

Show all results sharing these subjects:

  • Medicine and health
  • Dentistry

GO

Show Summary Details

Overview

focus to skin distance


Quick Reference

(fsd)

The distance between the focal spot of the x-ray tube (where x-rays are produced) marked with a red dot on the intra-oral x-ray head to the skin surface of the patient. For the long cone paralleling technique the fsd must be at least 20cms.


Reference entries