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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