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Improving CT Head Examination Eye Lens Exclusion at Princess Alexandra Hospital (Harlow, Essex)
EP29182
Poster Title: Improving CT Head Examination Eye Lens Exclusion at Princess Alexandra Hospital (Harlow, Essex)
Submitted on 14 Sep 2018
Author(s): Sarah Khan, Mark Gregory, James K. Diss, Varanasi V.R. Krishna
Affiliations: Radiology Department, Princess Alexandra Hospital, Hamstel Road, Harlow, Essex
This poster was presented at BIR Annual Congress 2018
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Poster Information
Abstract: Introduction: Ionizing radiation has a deterministic effect on the eye lens resulting in radiation-induced cataract. Direct eye lens exposure during CT Head Examination is of no discernible diagnostic benefit; indeed the lenses should always be excluded from the main beam, reducing lens dose ~8-fold. This study aimed to assess and improve current compliance with Eye Lens Exclusion at our hospital.

Materials & Methods: All CT Head Examinations performed in a 2-week period in June 2017 were reviewed. Re-audit was performed in August 2017 and again in February 2018, after the implementation of a number of changes to practice.

Results: Only 2 % (4/229) of examinations included in our initial study complied with the Eye Lens Exclusion standard. Two improvement areas were highlighted: (1) encouraging patient ‘chin-down’ head positioning, and (2) increasing Radiographers’ awareness of the importance of Eye Lens Exclusion. Measures were taken to address these, including (i) utilising a gantry head-cushion, (ii) asking Radiographers to instruct patients to ‘chin tuck’, and (iii) updating the Hospital Intranet CT Head Protocol. Re-audit in August 2017 demonstrated Lens Exclusion in 21.2 % (39/184) cases. Improving Radiographer awareness was further targeted by organising several dedicated small-group teaching sessions involving all Radiographers over the next months. Subsequent re-audit in February 2018 showed further improvement with Lens Exclusion in 46% (105/229) examinations.

Conclusion: We have significantly improved Eye Lens Exclusion at our hospital with a number of measures, with particular focus on increasing Radiographers’ awareness of the importance of appropriate planning of CT Head Examinations.
Summary: Direct eye lens exposure during CT Head Examination is of no discernible diagnostic benefit; indeed the lenses should always be excluded from the main beam, reducing lens dose ~8-fold. We have significantly improved Eye Lens Exclusion at our hospital with a number of measures, with particular focus on increasing Radiographers’ awareness of the importance of appropriate planning of CT Head Examinations.Report abuse »
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