Lower zone

Last revised by Dr Daniel J Bell on 02 Aug 2021

The lower zone is one of the four chest radiograph zones and is sometimes used synonymously with lung bases.

Radiographic features

Plain radiograph
  • on frontal chest radiographs, extends inferiorly from the inferior aspect of the hilum to the hemidiaphragm
CT
  • using the zonal terminology for the location of findings on chest CT is generally discouraged, as a more precise lobar +/- segmental site, can usually be provided

ADVERTISEMENT: Supporters see fewer/no ads

Cases and figures

  • Figure 1: lower zones highlighted
    Drag here to reorder.
  • Updating… Please wait.

     Unable to process the form. Check for errors and try again.

     Thank you for updating your details.