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NJDEP-Bureau of X-Ray Compliance

Radiation Exposure and Image Quality Statistics for All Facilities Performing PA Chest Radiographs

Radiation Exposure

(Before QA (year 0) and QA (years 1-10)

Machines that measured high or extremely high patient radiation exposure decreased from 34% in the first year to 4% in year-ten of the quality assurance program. Average radiation exposure has decrease by 51% for PA chest examination since the implemention of QA.
Image quality scores are measured and reported on a scale of zero to one hundred. Image quality scores are determined by the inspector’s evaluation of an x-ray taken of an image quality tool and processed using the facility’s processing equipment. The total image quality score is compiled by the inspector evaluating six areas of image quality including background density, high contrast resolution, low contrast resolution, density uniformity and noise/artifacts. Image quality scores of 0-29 are reported as poor; 30-49 as fair; 50-69 as good and 70 or greater as excellent image quality. Image quality scores have dramatically improved from year-one to year-ten of the quality assurance program. In year-one, 27% of machines evaluated had fair or poor image quality scores (ie./ score of 49 or lower). In year-ten, just 3% of all machines evaluated had image quality scores or 49 or lower.

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Last Update: February 25, 2016->