High Resolution Computed Tomography (HRCT)

In HRCT, thin sections of <1.5 mm width are acquired and reconstructed with a high spatial frequency algorithm, which allows the operator to visualise submillimetre structures and detect discrete abnormalities as small as 0.3 mm at the level of the secondary pulmonary lobule.2,5


HRCT offers two different techniques:5

Spaced axial HRCT

Volumetric HRCT (multidetector row CT):
  • Detection of all abnormalities
  • Easier and better interpretation owing to ability to perform coronal and sagittal reformations
  • Greater radiation dose compared to axial imaging (3-5 times)