Patient dosimetry in abdominal arteriography

Area of Science:

• Medical Imaging
• Radiological Physics
• Radiation Dosimetry

Background:

• Abdominal arteriography involves significant patient x-ray exposure.
• Accurate quantification of effective dose is essential for patient safety.
• Standardized dosimetry methods are needed for complex interventional procedures.

Purpose of the Study:

• To accurately quantify patient x-ray exposure and effective dose during abdominal arteriography.
• To develop and validate a dosimetry approach using automatic monitoring and Monte Carlo simulations.
• To establish dose-area product to organ dose conversion coefficients for common arteriographic views.

Main Methods:

• Utilized an automatic monitoring system to record exposure parameters during 172 abdominal arteriographies.
• Extracted common projections from a reference group for Monte Carlo calculations.
• Calculated dose-area product, organ doses, and effective doses for intravenous and intra-arterial procedures.

Main Results:

• Quantified average dose-area product as 32 Gy cm² (intravenous) and 47 Gy cm² (intra-arterial).
• Determined average effective doses of 4 mSv (intravenous) and 6 mSv (intra-arterial).
• Developed new conversion coefficients for nine key views contributing to 80% of total dose-area product.

Conclusions:

• Automatic monitoring combined with Monte Carlo dosimetry is feasible for complex arteriography.
• The study provides accurate dose quantification for patient safety in abdominal arteriography.
• Findings enable better estimation of effective dose based on measured dose-area product.