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X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging
Published on: September 11, 2011
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Effective doses in children: association with common complex imaging techniques used during interventional radiology
Priscilla Lai1, Sarah M McNeil, Christopher L Gordon
11 Department of Medical Physics and Applied Radiation Sciences, McMaster University, Hamilton, ON, Canada.
AJR. American Journal of Roentgenology
|November 22, 2014
Summary
Pediatric interventional radiology effective doses vary by procedure, with higher doses in younger children and abdominal exams. Digital subtraction angiography (DSA) delivers higher doses than fluoroscopy.
Area of Science:
- Medical Imaging
- Pediatric Radiology
- Radiation Dosimetry
Background:
- Interventional radiology (IR) procedures are increasingly used in pediatric care.
- Accurate assessment of radiation dose is crucial for minimizing risks in children.
- Limited data exists on effective doses for pediatric IR imaging techniques.
Purpose of the Study:
- To determine the range of effective doses for pediatric patients undergoing IR procedures.
- To evaluate dose variations based on imaging techniques, age, and anatomical region.
Main Methods:
- Utilized pediatric phantoms (ages 1, 5, 10 years) with metal oxide semiconductor field effect transistor (MOSFET) dosimeters.
- Simulated head, chest, and abdominal IR procedures using fluoroscopy, digital subtraction angiography (DSA), and spin angiography.
- Calculated effective doses using International Commission on Radiological Protection (ICRP) publication 103 tissue weights.
Main Results:
- Effective doses were higher in younger children (due to magnification) and for abdominal procedures.
- DSA (per 10 frames) delivered 2-3 times the dose of fluoroscopy (per minute).
- Three to five DSA frames equaled one minute of fluoroscopy dose; spin angiography was half of DSA.
Conclusions:
- Pediatric effective doses in IR procedures exhibit significant variability.
- Magnification in younger children and abdominal procedures increase radiation exposure.
- Dose optimization strategies are essential for pediatric interventional radiology.
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