@article{MAKHILLJEAS2017122415339,
    title = {A Study on the Utility of Automatic Exposure Control Function in a
Diagnostic Digital Radiography System},
    journal = {Journal of Engineering and Applied Sciences},
    volume = {12},
    number = {24},
    pages = {7685-7688},
    year = {2017},
    issn = {1816-949x},
    doi = {jeasci.2017.7685.7688},
    url = {https://makhillpublications.co/view-article.php?issn=1816-949x&doi=jeasci.2017.7685.7688},
    author = {Cheong-Hwan and},
    keywords = {AEC (Automatic Exposure Control,manual,SI (Signal Intensity),EI (Exposure Index),exposure,condition},
    abstract = {Diagnostic Digital Radiography (DR) systems may result in an excessive exposure of radiation, since,
there are no limitations about exposure levels to acquire the required medical images. This study aimed to
understand the proper dose of diagnostic DR equipment and to investigate SI when DICOM image was
captured and exposure level when it was tested according to automatic exposure control and manual modes.
Four diagnostic DR systems and a chest phantom were used. DICOM images were captured in the chest PA
test and their exposure levels were 5 times measured using a dosimeter, establishing AEC and manual modes,
respectively, during the chest PA test. The SI for captured DICOM images was recorded by establishing an ROI
with image J. The statistical analysis was performed utilizing the Mann-Whitney test. Measurements of the
diagnostic DR system yielded SI values that differed by manufacturers and ROIs of DICOM images while AEC
and manual modes of the same manufacturer’s equipment did not. The exposure level in the AEC mode
compared to the manual mode was measured to be lower by 5.7% in S company’s equipment by 49% for the P
company by 2.1% for the G company and by 187.2% for the C company one. The differences among the four
DR systems was statistically significant (p<0.05). It is suggested to use radiographic tests of outstanding image
quality flexibly with lower doses in consideration of the equipment characteristics and patient&#146;s physical
conditions, recognizing that excellent medical images can be captured with lower doses in the DR system by
the manual mode than by AEC. Since, the AEC function in the diagnostic DR system may not capture the
medical image at lowest exposure levels, manual modes that take patient&#146;s physical conditions into account are
thought to contribute in the reduction of doses.}
    }