Chest radiograph zones

Dr Owen Kang and Dr Jeremy Jones et al.

The chest radiograph zones are useful when describing the location of pathology on a frontal chest radiograph.

The chest radiograph is a 2D representation of a 3D structure. Since the interfaces between the lobes are orientated obliquely, it is often not possible to determine which lobe pathology is located in or whether it is located anteriorly or posteriorly. Hence, describing the location of pathology using the four-zone technique is helpful:

It is recommended to use the zones loosely while reporting as the distinctions are arbitrary and do not correspond to anatomic structures 1.

See also


Chest x-ray
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Article Information

rID: 13648
System: Chest
Section: Approach
Synonyms or Alternate Spellings:
  • 4-zones on a chest radiograph

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  • Drag
    Normal CXR - 4 zo...
    Figure 1: normal CXR
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    Normal CXR - apic...
    Figure 2: apical zone
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    Normal CXR - uppe...
    Figure 3: upper zone
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    Normal CXR - mid ...
    Figure 4: mid zone
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    Normal CXR - lowe...
    Figure 5: lower zone
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