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An assessment of exposure indices in computed radiography for the posterior–anterior chest and the lateral lumbar spine

Medical Radiation Science, School of Health Sciences, Faculty of Health, University of Newcastle, University Drive, Callaghan, NSW 2308, Australia

View larger version (8K): [in this window] [in a new window]   Figure 1. Box and whisker plots of exposure index(EI) at hospitals A and B for (a) posteroanterior (PA) chest and (b) lateral (LAT) lumbar spine examinations.

View larger version (13K): [in this window] [in a new window]   Figure 2. Histogram showing the percentage distribution of examinations which have exposure indices(EIs) below, within and above manufacturers recommended range (MRR) for (a) posteroanterior (PA) chest examination and (b) lateral (LAT) lumbar spine examinations.

View larger version (21K): [in this window] [in a new window]   Figure 3. Scattergram illustrating exposure creep identified for the lateral(LAT) lumbar spine in hospital A.

View larger version (11K): [in this window] [in a new window]   Figure 4. Line plot illustrating the relationship between exposure index(EI) and entrance surface dose (ESD) for a constant tube potential.