Imaging of respiratory muscles in neuromuscular disease: A review

•Imaging enables the study of respiratory muscles in neuromuscular disease.•Static imaging techniques include chest radiography, B-mode ultrasound, CT and MRI.•Dynamic imaging techniques include fluoroscopy, M-mode ultrasound and MRI.•MRI enables studying diaphragmatic movements simultaneously with pulmonary function tests.•MRI provides the most detailed information about different respiratory muscles.