Multidetector row CT scan in hypersensitivity pneumonitis: contribution of minimum intensity projection reformation.

The objective of this pictorial essay is to highlight the key role of computed tomography scanning (CT scan), particularly minimum intensity projection (MinIP) reformation, with regards to the diagnosis of hypersensitivity pneumonitis (HP) and its contribution to patients' management. MinIP enhances detecting the characteristic CT scan features of HP, particularly air trapping and ground-glass opacities, features representing the bronchoalveolar lavage or biopsy core target zones to the clinician.