There are several anxiety-related reactions associated with magnetic r
esonance imaging (MRI), Patients who experience such reactions may dis
rupt the examination or move so much that images are degraded. These e
xperiences may also influence patients' perceptions of the quality of
their care. The objective of this study was to further assess the subj
ective experiences of patients undergoing MRI in an attempt to identif
y those patients likely to have problems and factors affecting their e
xperiences. Five hundred consecutive patients undergoing MRI were surv
eyed using questionnaires before and immediately after imaging. Anxiet
y was measured using the state anxiety component of the state-trait an
xiety inventory. All patients exhibited some degree of pre-imaging anx
iety. This was particularly associated with a previous 'unpleasant' im
aging experience. Patients who experienced problems during MRI had pre
-imaging anxiety levels equivalent to patients about to undergo surger
y, were more likely to react badly when first seeing the scanner and w
ere more likely to leave the MRI unit with even greater feelings of an
xiety than when they arrived. In contrast to previous studies, anxiety
was not associated with either the patient's understanding of the pro
cedure or the duration of the examination. Several features have been
identified which could improve the patient's experience (e.g. better i
nformation sheet). Awareness of MRI-related anxiety should also be con
sidered when assessing the impact of MRI on outcome for the patient.