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focus film distance

Teleradiography: Extending the focus film distance

August 15, 2014

Lengthened focal film distances reduce the radiation burden to the patient and enhance final film result. Clinicians possessing adequate radiographic equipment are advised to use a minimum FFD of 150cm (60″) and preferably 200cm (80″). (JCCA 1986; 30(3):143-144) Key Words: teleradiography, focus film distance, inverse square law Des distances focales film allongées permettent de réduire

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