Abstract: A magnetic resonance imaging assembly for generating a substantially homogenous magnetic field within an imaging-field-zone to produce an image of a region (anatomy-of-interest (2)) in a patient (1) comprises a bore into which the region of the patient can be placed, and a plurality of coaxially arranged coils (30a, b, c, d) surrounding the bore. The coils are arranged to generate a substantially homogenous magnetic field in the imaging-field-zone in the bore. The bore has a diameter (38) substantially larger than the axial length (39) of the bore. The large bore enables any region of the patient to be imaged to be placed in the region of highest homogeneity within the imaging field zone (11) and provides for access to the region of the patient being imaged to a health-care professional (5) during the imaging process.