A detailed study of radiation dose and radiographic technique during chest radiography.
AffiliationRegional Department of Medical Physics and Bioengineering, Christie hospital and Holt Radium Institute, Manchester and *X-ray Department, Burnley General Hospital, Burnley, Lancashire
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AbstractThe radiation dose to a series of patients referred for chest radiography has been monitored using thermoluminescent dosimetry. The postero-anterior projection was employed throughout the study. Measurements were made in two rooms of the same general hospital. Each room was equipped with automatic exposure control of the air ionisation chamber type. The effect of this equipment on patient exposure was investigated and compared with manual exposure control. In all cases the tube potential (kVp) was selected by the radiographer but tube current (mA) was determined by the generator. Anterior and posterior radiation doses were measured using sachets of lithium fluoride. For each group of patients the anterior exit dose, and therefore all of the radiation dose, was lower when automatic control was used. The standard deviation on the anterior patient dose was lower under automatic control, which resulted in fewer films needing to be repeated due to incorrect film density. Film densities were also investigated using a densitometer, to provide a further comparison between the two types of exposure control.
CitationA detailed study of radiation dose and radiographic technique during chest radiography. 1986, 59 (699):245-9 Br J Radiol
JournalThe British Journal of Radiology
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