title: [Imaging origins and characteristics analysis of acute and chronic aspiration pneumonia].
abstract: OBJECTIVE
  To discuss about the pathologic and imaging origins and characteristics of CT scaning and X-ray radiography for acute and chronic aspiration pneumonia.
  
  
  METHODS
  Imaging data from 30 patients with aspiration pneumonia were retrospectively analyzed, CT scaning was performed in 27 patients, which PMVR reconstruction was performed in 21 cases;3 exammed by X-ray with 2 used by esophagography.
  
  
  RESULTS
  Opaque bodies were detected in trachea by CT scaning in 12 patients.7 patients in acute phase rapidly developed into acute respiratory distress syndrome(ARDS). CT signs of 30 patients with acute and chronic aspiration pneumonia included: centrilobular nodules were detected in 2 cases with acute phase, 4 cases with subacute phase and 4 cases with chronic phase; the imaging of ground glass opacity were detected in 9 cases with acute phase, 2 cases with subacute phase and 3 cases with chronic phase; the imaging of bronchiectasis was detected in 8 cases with chronic phase, which mucilage embolism was detected in 3 of 8 cases; the imaging of atelectasis was detected in 6 cases with chronic phase; the imaging of sheeted consolidation was detected in 5 cases with chronic phase, 8 case with acute phase; the imaging of interstitial fibrosis was detected in 3 cases with chronic phase. Lesions of inferior lobe of right lung were detected in 9 cases with chronic phase, 4 cases with subacute phase, 11 case with acute phase;lesions of inferior lobe of left lung were detected in 6 cases with chronic phase and 3 cases with subacute group, 11 case with acute phase.
  
  
  CONCLUSIONS
  The imaging features of acute and chronic aspiration pneumonia overlap with GGO and centrilobular nodules in every group. While the imaging features of atelectasis, bronchiectasis or mucilage embolism are found in chronic phase. The chest CT scaning may accurately evaluate the dynamic change of aspiration pneumonia.
authors.affiliation: Department of Radiology, Putuo Hospital, Affiliated to Shanghai China Traditional Medicine University, Shanghai 200061, China. Email: wangkang710426@sina.com.
authors.forename: Kang
authors.initials: K
authors.lastname: Wang
authors.affiliation: Department of Radiology, Putuo Hospital, Affiliated to Shanghai China Traditional Medicine University, Shanghai 200061, China.
authors.forename: Ming
authors.initials: M
authors.lastname: Li
authors.affiliation: Department of Radiology, Putuo Hospital, Affiliated to Shanghai China Traditional Medicine University, Shanghai 200061, China.
authors.forename: Xiongbiao
authors.initials: X
authors.lastname: Wang
authors.affiliation: Department of Radiology, Putuo Hospital, Affiliated to Shanghai China Traditional Medicine University, Shanghai 200061, China.
authors.forename: Jianmin
authors.initials: J
authors.lastname: Qin
authors.affiliation: Department of Radiology, Putuo Hospital, Affiliated to Shanghai China Traditional Medicine University, Shanghai 200061, China.
authors.forename: Zhi
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Department of Radiology, Putuo Hospital, Affiliated to Shanghai China Traditional Medicine University, Shanghai 200061, China.
authors.forename: Zehua
authors.initials: Z
authors.lastname: Zhao
authors.affiliation: Department of Radiology, Putuo Hospital, Affiliated to Shanghai China Traditional Medicine University, Shanghai 200061, China.
authors.forename: Le
authors.initials: L
authors.lastname: Qin
authors.affiliation: Department of Radiology, Putuo Hospital, Affiliated to Shanghai China Traditional Medicine University, Shanghai 200061, China.
authors.forename: Yanqing
authors.initials: Y
authors.lastname: Hua
mesh_terms: D000208:Acute Disease; D002908:Chronic Disease; D006801:Humans; D017563:Lung Diseases, Interstitial; D011015:Pneumonia, Aspiration; D001261:Pulmonary Atelectasis; D012128:Respiratory Distress Syndrome; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed