High kilovoltage techniques and the choice of optimal filtration in xeroradiography

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Abstract
The widespread interest among radiologists and clinicians concerning radiation dosage to the patient in xeroradiography prompts us to point out some relevant factors affecting this issue. A previous publication on patient dosage (Boag et al., 1976) showed that the use of an applied tube voltage of 122 kV (effective) resulted in an incident skin exposure similar to that of comparable conventional techniques employing X-ray film with intensifying screens (but at lower kilovoltages). At that time 1 22 kV (effective) was the maximum available to us. However, more recently we have had regular access to equipment used for general xeroradiography up to 150 kV (nominal)* and occasional access to other equipment operating at tube voltages up to 200 kV (nominal)†.

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