EuroSafe Imaging 2019
Action 4 - Dose management systems, Action 1 - Guidelines, implementation policies, and Clinical Decision Support (ESR iGuide), Computer applications, Radioprotection / Radiation dose, CT, Technical aspects, Radiation safety, Quality assurance, Education and training
B. Carey, C. Kennedy, R. Kavanagh, N. Moore, M. A. Maher, O. O’Connor, S. O'Neill
Conclusion and recommendations
Overall the best BMI-diameter correlation was found with Effective Diameter (DE) [r=0.88,
y = 0.76x + 9.4 Utilising this equation,
the patient’s BMI (x) can be used to calculate an estimate for the effective diameter (y),
DE = 0.76(BMI) + 9.4.
Dose optimisation is key to current radiology practice.
To be useful and effective,
any applied method of estimating patient radiation dose needs to be user-friendly and reproducible.
We demonstrated a strong correlation between BMI and both effective diameter and SSDE (r=0.88,
Regression analysis produced a simple equation to calculate effective diameter from BMI.
BMI is an accurate alternative to effective diameter for SSDE estimation in abdominal CT.
The present paper indicates that patient BMI can be used to accurately estimate effective diameter,
obviating the need to measure anteroposterior and lateral diameters in order to calculate SSDE at time of CT.