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Published online before print November 22, 2005, 10.1148/radiol.2381040088
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Chlamydia Pneumoniae: Comparison with Findings of Mycoplasma Pneumoniae and Streptococcus Pneumoniae at Thin-Section CT1

Atsushi Nambu, MD, Akitoshi Saito, MD, Tsutomu Araki, MD, Katsura Ozawa, MD, Yoshimitsu Hiejima, PhD2, Masaki Akao, MD, Zennosuke Ohki, MD and Hiroshi Yamaguchi, MD

1 From the Departments of Radiology (A.N.) and Internal Medicine (K.O., M.A., Z.O., H.Y.), Kofu Municipal Hospital, Kofu, Yamanashi prefecture, Japan; Department of Radiology, University of Yamanashi (A.S., T.A.), Shimokawato 1110, Tamaho-cho, Nakakoma-gun, Yamanashi prefecture, Japan 400-3898; and Center for Life Science Research, Bioinformatics Support Section, Data Science Division, University of Yamanashi, Yamanashi, Japan (Y.H.). Received January 21, 2004; revision requested March 19; revision received February 5, 2005; accepted March 2. Address correspondence to A.N. (e-mail: nambu-a{at}gray.plala.or.jp).



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  		Figure 1: Transverse thin-section CT scan demonstrates C pneumoniae bronchopneumonia with airway dilatation in 66-year-old man. Centrilobular nodules (arrows) and lobular areas of consolidation with bilateral airway dilatation (arrowheads) are seen. Note the associated areas of linear opacity.

 


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  		Figure 2: Transverse thin-section CT scan demonstrates C pneumoniae pneumonia with consolidation predominance in 79-year-old man. Segmental consolidation with partially intermingled areas of GGO in right middle lobe and patchy areas of GGO in both lower lobes (*) are seen. Associated linear opacities (arrows) and scattered dotlike areas of low attenuation (arrowheads), which are indicative of centrilobular emphysema, are also noted.

 


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  		Figure 3: Transverse thin-section CT scan demonstrates C pneumoniae pneumonia with GGO predominance in 23-year-old man. Extensive areas of GGO are seen in the left lower lobe, which demonstrates thickened bronchovascular bundles (arrows) and fine reticular framework (ie, crazy-paving appearance).

 


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  		Figure 4: Transverse thin-section CT scan demonstrates S pneumoniae airspace pneumonia in 54-year-old man. Segmental consolidation with air bronchograms (arrows) is seen in right middle lobe. Focal area of GGO (arrowhead) is noted in right lower lobe.

 


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  		Figure 5: Transverse thin-section CT scan demonstrates M pneumoniae bronchopneumonia in 23-year-old man. Branching centrilobular nodules (tree-in-bud appearance, arrowheads) are seen on a background of faint GGO. Bronchial wall thickening (arrow) is also noted.

 




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