Imaging in the intensive care unit

Imaging is an important adjunct to clinical assessment in the management of patients on the intensive care unit (ICU). Chest radiography and ultrasound are the mainstays of initial evaluation, although other techniques, such as computed tomography and magnetic resonance imaging, are being increasingly utilized. This article aims to review the main indications, strengths and weaknesses of the key imaging modalities used in this patient group and to help guide appropriate selection of radiological investigations for common ICU clinical scenarios.