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Calculating the peak skin dose resulting from fluoroscopically guided interventions. Part I: Methods
A Kyle Jones1, Alexander S Pasciak
1Department of Imaging Physics, Division of Diagnostic Imaging, The University of Texas M. D. Anderson Cancer Center, Houston, TX 77030, USA. kyle.jones@mdanderson.org
Journal of Applied Clinical Medical Physics
|November 18, 2011
Summary
Calculating peak skin dose after fluoroscopic procedures is often necessary. This review details methods to estimate patient skin dose using available data or measurements, crucial for assessing radiation risks.
Area of Science:
- Medical Physics
- Radiology
- Radiation Dosimetry
Background:
- Direct peak skin dose measurement during fluoroscopy is often impractical post-procedure.
- Accurate peak skin dose (PSD) knowledge is frequently needed retrospectively for patient management and adverse event assessment.
Purpose of the Study:
- To review methods for calculating peak skin dose (PSD) in various clinical scenarios.
- To guide estimation of PSD when direct measurements are not feasible.
Main Methods:
- Data acquisition from dose reports, DICOM headers, and interviews.
- Conversion of dose metrics like reference point air kerma (K(a,r)) and kerma area product (KAP) to PSD.
- Utilizing factors such as the f-factor and backscatter factor.
Main Results:
- Provides a framework for estimating PSD using retrospective data.
- Discusses data availability and the necessity for additional measurements when data is scarce.
- Includes tables for f-factor and backscatter factor to aid calculations.
Conclusions:
- Retrospective calculation of PSD is feasible using various data sources and conversion methods.
- Understanding conversion factors and potential errors is vital for accurate PSD estimation.
- This review aids in managing radiation exposure and patient safety in fluoroscopically-guided procedures.
