Magnetic resonance (MR) has an important role to play in the imaging of the paediatric chest, not least because of its zero ionizing radiation dose. Computerized tomography (CT) has been the preferred technique for cross-sectional imaging to date because of the ease of access, speed and superior spatial resolution. This article discusses the clinical situations where magnetic resonance may be used as the primary cross sectional imaging modality. The clinical indications and the complimentary roles of magnetic resonance and computerized tomography are discussed. The patient preparation, technical aspects, advantages and disadvantages of MR are documented.