title: CT of tracheal agenesis.
abstract: BACKGROUND
  Tracheal agenesis is a rare and usually lethal anomaly. In the past, opaque contrast medium was injected via the esophagus to demonstrate the anatomy.
  
  
  OBJECTIVE
  To demonstrate the utility of helical and multidetector CT in delineating the aberrant anatomy in newborns with tracheal agenesis.
  
  
  METHODS
  Four newborns with tracheal agenesis were identified from three institutions. Imaging studies and medical records were reviewed. Each child was imaged with chest radiography. One child was imaged on a single-detector helical CT scanner and the other three on multidetector scanners.
  
  
  RESULTS
  Helical and multidetector CT with 2D and 3D reconstructions clearly delineated the aberrant tracheobronchial and esophageal anatomy in each infant. Minimum intensity projection reformatted CT images were particularly helpful. One infant each had type I and type II tracheal agenesis. Two infants had type III tracheal agenesis. All four infants died.
  
  
  CONCLUSIONS
  CT is a useful tool for delineating the aberrant anatomy of newborns with tracheal agenesis and thus helps in making rational clinical decisions.
authors.affiliation: Section of Pediatric Radiology, C. S. Mott Children's Hospital, Department of Radiology, University of Michigan Health System, 1500 East Medical Center Dr, Ann Arbor, MI 48103-0252, USA. pstrouse@umich.edu
authors.forename: Peter J
authors.initials: PJ
authors.lastname: Strouse
authors.forename: Beverley
authors.initials: B
authors.lastname: Newman
authors.forename: Ramiro J
authors.initials: RJ
authors.lastname: Hernandez
authors.forename: Ehsan
authors.initials: E
authors.lastname: Afshani
authors.forename: Mahesh
authors.initials: M
authors.lastname: Bommaraju
mesh_terms: D016477:Artifacts; D006801:Humans; D021621:Imaging, Three-Dimensional; D007231:Infant, Newborn; D011857:Radiographic Image Interpretation, Computer-Assisted; D013902:Radiography, Thoracic; D015619:Respiratory System Abnormalities / Q000000981:diagnostic imaging*; D036542:Tomography, Spiral Computed; D014057:Tomography, X-Ray Computed / Q000379:methods*; D014132:Trachea / Q000002:abnormalities* / Q000000981:diagnostic imaging*