This Article Full Text (PDF) Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Ardran, G. M. Articles by Crooks, H. E. Search for Related Content PubMed PubMed Citation Articles by Ardran, G. M. Articles by Crooks, H. E.

Routine Dose Recording in Diagnostic Radiology

Health Physics and Medical Division, Harwell and Nuffield Institute for Medical Research, University of Oxford

This excerpt was created in the absence of an abstract.

Methods of measuring and ways of expressing patient dose in routine diagnostic radiography are briefly reviewed. Measurement of dose in units such as ergs or joules should be confined to instances when dose is measured in a specific structure: this will be a laboratory procedure since to obtain the data necessary may require several exposures.

Routine dose measurement normally has to rely on a single measurement using an incident exposure meter which will include radiation not actually absorbed in the patient and which will record the same dose whether there is a patient in the beam or not. Dose measured in this manner should be recorded in r x cm² in order that the results may not be considered to be more accurate than they really are.

Results are given of a test of a commercially available r x cm² instrument: and data are given which can be used to convert exposure into g–r assuming that all the radiation is absorbed in soft tissue, for kVp's between 50 and 150. In practice the ability to automatically integrate the area is usually more important than to correct for HVT. Dose meters of the r x cm² type are useful in fluoroscopy when the area is continually variable and for procedures in which the dose may be relatively high or when it is desired to keep a check on personnel in training.

Received for publication June 1, 1962.