Fig. 2

Summary of qualitative image scoring. A Representation of qualitative scores for both image quality and artefact presence/severity across all examinations. Each row represents a single examination, with examinations grouped according to site. Each column represents a different scoring metric. A black rectangle indicates that a score was not possible for that examination, e.g. Dixon imaging could not be scored because it was not provided, or brain distortion could not be scored as the first imaging station was not acquired due to patient kyphosis. B, C Image quality scores separated by field strength and site respectively. The dashed braces in A indicate groups for which a statistically significant difference in means was found, using a Mann–Whitney U test