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C-0716 - A dynamic approach to CT KUB scanning field - an audit to minimise radiation dose

T. T. C. Cavenagh, M. J. Seager, J. Barber; London/UK Type: Scientific Exhibit
Area of Interests: Radioprotection / Radiation dose, Urinary Tract / Bladder
Imaging Technique: CT
Procedure: Radiation safety
Special Focus: Calcifications / Calculi
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Aims and objectives: Computed tomography of the kidneys, ureters and bladder (CT KUB) is the favoured imaging technique to investigate urinary tract calculi1. Radiation dose of this common examination should be minimised without compromising diagnostic adequacy. This is particularly important as CT KUB scans are perform[...]

Methods and materials: We retrospectively reviewed 100 consecutive CTKUB scans (March-April 2016) in patients over 18 years old. Data was collected on scan start height, the vertebral level of superior border of kidneys, and the DLP. The scan start height was defined as the most superior fully imaged vertebra. The superio[...]

Results: The mean age at the time of scanning was 48.0 years (range 18.1-84.5 years), with 46 females and 54 males. 20% of scans commenced at T10 and 90% of scans had a DLP below the national target.   The full break down of scan start height and superior border of kidneys is shown in Figure 2. Intere[...]

Conclusion: The current departmental protocol performs well in terms of patient dose. However, some scans are starting superior to T10 so there is room for improvement. We are currently trialling a new protocol where scans are commenced at whichever is lowest, T10 or the diaphragm. A poster demonstrating this,[...]

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References: iRefer. Making best use of a Department of Clinical Radiology, Guidelines for Doctors, 7th Edition 2012, The Royal College of Radiologists, London. Renal or ureteric colic - acute; NICE CKS, April 2015 Computed tomography of the kidneys, ureter and bladder – how low can you go? Maguire J, Gray K. Cl[...]

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