Radiation Doses in Interventional Radiology Procedures: The RAD-IR Study: Part III: Dosimetric Performance of the Interventional Fluoroscopy Units
Section snippets
Radiation Dose Quantities
The unmodified word “dose” is used with only one of its many meanings in this report and others of the RAD-IR series (a glossary of radiobiological terms is included in Parts I and II of the RAD-IR study) (2, 3). In this report, dose means air-kerma without scatter. This meaning is consistent with the usage found in relevant Federal Drug Administration (FDA) and IEC documentation (4, 5, 6).
Skin dose can be calculated from air-kerma at the skin with use of wellknown techniques and measurements
Comprehensive Physics
Forty-eight sets of comprehensive physics measurements were collected during the course of the study, with two to five data sets collected on each individual imaging plane. All sites completed initial and final evaluations for each plane. As anticipated, some imaging planes required additional measurements after x-ray tube replacement.
The reference ionization chambers used at each site were required to have a current compliance or calibration certificate, were presumed to be accurate and were
DISCUSSION
Sources of error in cumulative dose measurements include DAP sensor output, conversion of DAP to cumulative dose and reference ionization chamber accuracy. Variations in the output of the DAP sensor result from variations in beam energy and filtration, DAP rate, irradiation time, field size, operating voltage, local air pressure, temperature, humidity, and electromagnetic compatibility. The range of phantom material thickness and exposure modes used for comprehensive physics measurements
Acknowledgment
The authors thank Hannes Seissl (Siemens AG Medical Solutions, Forchheim, Germany), for his technical descriptions, manufacturer's calibration procedural information, and other related inputs into this project and report.
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Cited by (48)
Patient Radiation Doses in IR Procedures: The American College of Radiology Dose Index Registry-Fluoroscopy Pilot
2023, Journal of Vascular and Interventional RadiologyThe American College of Radiology Fluoroscopy Dose Index Registry Pilot: Technical Considerations and Dosimetric Performance of the Interventional Fluoroscopes
2020, Journal of Vascular and Interventional RadiologyCitation Excerpt :Radiation dose indices were also stable over the course of the pilot for the 28 imaging planes with evaluations available from the 3 time points. These results are similar to those reported previously, including those reported in the RAD-IR study (3,7). The RAD-IR study (3) reported the ratio of the displayed index to the measured index, which is the reciprocal of the correction factors reported in the present study.
Impact of low dose settings on radiation exposure during pediatric fluoroscopic guided interventions
2018, European Journal of RadiologyCitation Excerpt :A comprehensive report investigating the use of interventional procedures in 20 countries, including developing countries, has emphasized the need to promote radiation safety precautions especially for pediatric patients [1]. While robust data about fluoroscopy dose metrics has been collected in adults [2–4], most of the knowledge regarding pediatric fluoroscopy dose metrics during interventional procedures is obtained from cardiac catheterization procedures as well as neuroradiological interventions [5,6]. Only recently, comprehensive data on pediatric radiation doses have been reported and reference levels for pediatric interventional procedures have been suggested [7].
Understanding and Using Fluoroscopic Dose Display Information
2015, Current Problems in Diagnostic Radiology
Supported in part by a grant from the Cardiovascular and Interventional Radiology Research and Education Foundation.
None of the authors have identified a potential conflict of interest.
The opinions expressed herein are those of the authors and do not necessarily reflect those of the United States Navy, the Department of Defense, or the Department of Health and Human Services
- 1
Current affiliation: Department of Radiology, Lahey Clinic, Burlington, Massachusetts.
- 2
Current affiliation: Division of Neuroendovascular Surgery, University of Illinois at Chicago, Chicago, Illinois.
- 3
Current affiliation: Department of Radiology, University of Colorado Health Sciences Center, Denver, Colorado.
- 4
Current affiliation: Department of Radiology, Hahnemann University Hospital, Drexel College of Medicine, Philadelphia, Pennsylvania.
- 5
Current affiliation: Trinity Imaging and Intervention, Trinity Clinic, Tyler, Texas.