Volumetric (Helical/Spiral) CT (VCT) of the airways

David P. Naidich, James F. Gruden, Georgeann McGuinness, Dorothy I. McCauley, Meenakshi Bhalla

Research output: Contribution to journalArticlepeer-review

83 Scopus citations


Volumetric computed tomography (VCT) represents an important improvement over conventional CT for assessing most airway abnormalities. Elimination of misregistration due to variations in respiration coupled with decreased motion artifacts and the ability to obtain routine overlapping sections allow a more confident estimation of the presence and extent of disease. Recently, attention has focused on newer reconstruction techniques including: multiplanar reconstructions (MPRs), including curved multiplanar reformations; multiplanar volume reconstructions (MPVRs) using ray projection techniques, such as maximum and minimum projection imaging; external rendering, or 3D-shaded surface displays; and, most recently, internal rendering or so-called 'virtual bronchoscopy'. Given the often redundant nature of many of these methodologies determining indications for their use remains to be established, especially by comparison to axial imaging. The purpose of this article is to review these various reconstruction techniques and, based on current knowledge, place them in an appropriate clinical context.

Original languageEnglish (US)
Pages (from-to)11-28
Number of pages18
JournalJournal of Thoracic Imaging
Issue number1
StatePublished - Jan 1997


  • Bronchi
  • CT comparative studies
  • CT intensity projection
  • CT projection imaging
  • Computed tomography (CT)
  • Helical CT
  • High-resolution CT
  • Multiplanar reconstruction
  • Spiral CT
  • Three-dimensional CT
  • Tracheal stenosis or obstruction
  • Volumetric CT

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Pulmonary and Respiratory Medicine


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