aims: 1. compare memory ability between ct and mri radiographers using the rey auditory verbal learning test (ravlt) and between mri radiographers working with 1 and 1.5tesla (t) scanners. 2. investigate the change in memory ability (as measured by ravlt) with increasing time worked in mri.

subjects: 11 ct and mri radiographers from four hospital sites were included. each worked exclusively in their modality. ravlt was administered once to each subject. results show no significant difference between mri and ct groups' scores. there were significantly lower scores in subjects who worked more than 5 years in mri and subjects who worked with 1.5t scanners.

the results indicate that static magnetic fields may have a detrimental effect on memory ability. these results indicate the need for further research into the neuropsychological effects of the mri environment on occupationally exposed staff.