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Multidetector CT of Bronchiectasis: Effect of Radiation Dose on Image Quality

Chin A Yi1, Kyung Soo Lee1, Tae Sung Kim1, Daehee Han1, Yon Mi Sung1 and Seonwoo Kim2

1 Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50, Ilwon-Dong, Kangnam-Ku, Seoul 135-710, Korea.
2 Biostatistics Unit, Samsung Biomedical Research Institute, Samsung Medical Center, Seoul 135-710, Korea.



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  		Fig. 1A. —43-year-old man with suspected bronchiectasis who underwent multidetector CT (MDCT) at lung window settings using different milliamperages. MDCT scans obtained at 170 mA were given score of 5 (A); at 100 mA, score of 4 (B); at 70 mA, score of 4 (C); at 40 mA, score of 3 (D); at 20 mA, score of 2 (E); and at 10 mA, score of 1 (F).

 


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  		Fig. 1B. —43-year-old man with suspected bronchiectasis who underwent multidetector CT (MDCT) at lung window settings using different milliamperages. MDCT scans obtained at 170 mA were given score of 5 (A); at 100 mA, score of 4 (B); at 70 mA, score of 4 (C); at 40 mA, score of 3 (D); at 20 mA, score of 2 (E); and at 10 mA, score of 1 (F).

 


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  		Fig. 1C. —43-year-old man with suspected bronchiectasis who underwent multidetector CT (MDCT) at lung window settings using different milliamperages. MDCT scans obtained at 170 mA were given score of 5 (A); at 100 mA, score of 4 (B); at 70 mA, score of 4 (C); at 40 mA, score of 3 (D); at 20 mA, score of 2 (E); and at 10 mA, score of 1 (F).

 


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  		Fig. 1D. —43-year-old man with suspected bronchiectasis who underwent multidetector CT (MDCT) at lung window settings using different milliamperages. MDCT scans obtained at 170 mA were given score of 5 (A); at 100 mA, score of 4 (B); at 70 mA, score of 4 (C); at 40 mA, score of 3 (D); at 20 mA, score of 2 (E); and at 10 mA, score of 1 (F).

 


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  		Fig. 1E. —43-year-old man with suspected bronchiectasis who underwent multidetector CT (MDCT) at lung window settings using different milliamperages. MDCT scans obtained at 170 mA were given score of 5 (A); at 100 mA, score of 4 (B); at 70 mA, score of 4 (C); at 40 mA, score of 3 (D); at 20 mA, score of 2 (E); and at 10 mA, score of 1 (F).

 


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  		Fig. 1F. —43-year-old man with suspected bronchiectasis who underwent multidetector CT (MDCT) at lung window settings using different milliamperages. MDCT scans obtained at 170 mA were given score of 5 (A); at 100 mA, score of 4 (B); at 70 mA, score of 4 (C); at 40 mA, score of 3 (D); at 20 mA, score of 2 (E); and at 10 mA, score of 1 (F).

 

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