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KMID : 1001220020050010064
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Journal of the Korean Society of Digital Medical Imaging Technology
2002 Volume.5 No. 1 p.64 ~ p.77
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The Comparison of Image Quality between Computed Radiography(CR)and Direct Digital Radiography(DDR) which Follows the Proper Exposure Conditions in General Photographing under the Digital Radiography(DR)
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Kim Jin-Bae
Kang Chung-Hwan
Kang Sung-Jin
Park Soo-In
Park Jong-Won
Kim Yeong-Su
Kim Seung-Sik
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Abstract
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DR has had an important feet not only in the department of radiology but also in productivity or work efficiency of a whole hospital. The environment of DR has more various parameter than CR. so it is able to supply high quality of medical service. The current environment of radiology department in each hospital has been changed from Film-Screen system to DR through Full-PACS. This hospital which uses Full-PACS became to study the proper condition of CR and DDR and how the image quality of them is expressed among general photographing systems in the DR environment. From this experiment, the image quality of DDR is better than CR under the same exposure condition. And in the DDR system, the score of image which uses AEC is a little higher than the score which doesn’t use it. Especially it can be known that the function of AEC of DDR is useful to improve the image quality in the part of skull and chest. (The function of AEC : It is the tool that detects the ionized current of x-ray which goes through objects with using the ion chamber which is in the detector. Also it controls the examination of X-ray when the proper density is reached.) Because the proper degree of density can be represented by this system, the photographing can be taken much easily without consideration of the exposure condition with the thickness of various objects. From the result of this experiment, it can be known that the selection of proper exposure condition plays an important rule to gain good Image Quality. More researches will be necessary about DDR system which has potential ability in the future.
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