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Assessment of organ radiation doses and associated risk for digital bifemoral arteriography

¹ Joint Department of Physics, Royal Marsden NHS Trust, London SW3 6JJ, UK ² Vascular Radiology Service, Royal Brompton Hospital NHS Trust, London SW3 6NP, UK ³ Department of Imaging, The Middlesex Hospital, London W1N 8AA, UK

An assessment has been made of the absorbed dose associated with femoral arteriography using a digital imaging system. A bilateral femoral arteriogram was performed on 17 patients, using a filmless 1024 matrix digital image acquisition system with a discrete stepping tube-stand and 40 cm image intensifies A standardized protocol of manual patient/tube-stand positioning under fluoroscopic control and automatic stepping digital acquisition was followed. Skin entry doses were measured with a dose–area product meter for each stage of the procedure, and the total gonad dose was assessed with thermoluminescent dosimeters (TLDs). Published Monte Carlo simulations were supplemented with further calculations to evaluate organ doses from the dose–area products measured. Comparison with the TLD measurements indicated that this technique overestimated organ doses by about 30%. A mean effective dose of 3.1 ± 1.8 mSv was calculated for the procedure, with the greatest dose burden being imposed by fluoroscopy during catheter manipulation. The related radiation detriment is 0.018%, which is insignificant when compared with the overall mortality from peripheral vascular disease.

^* Current address: Medical Physics Department, Royal Free Hospital, London NW3 2QG, UK.

Received for publication October 7, 1994. Revision received December 20, 1994. Accepted for publication January 12, 1995.

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