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Procedure-specific CT Dose and Utilization Factors for CT-guided Interventional Procedures.

Kai Yang1, Suvranu Ganguli1, Matthew C DeLorenzo1

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This study quantifies radiation dose metrics and CT utilization for CT-guided interventional procedures. Findings reveal significant variations, aiding in optimizing radiation safety for interventional radiology.

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Area of Science:

  • Radiology
  • Medical Imaging
  • Radiation Oncology

Background:

  • CT-guided interventional procedures are increasingly common.
  • Standardized radiation dose metrics and utilization factors are needed for these procedures.

Purpose of the Study:

  • To present procedure-specific radiation dose metric distributions.
  • To define quantitative CT utilization factors for CT-guided interventional procedures.

Main Methods:

  • Retrospective analysis of 8213 CT-guided interventional procedures (2012-2017).
  • Procedures categorized into ablation, aspiration, biopsy, and drainage.
  • Analysis of dose metrics and CT utilization parameters (scan length, acquisition count, image count).

Main Results:

  • Interventional CT dose metrics differ significantly from diagnostic CT.
  • Wide variations in dose metrics observed across subcategories.
  • Median dose-length products for common procedures: liver ablation (2351 mGy·cm), chest aspiration (657 mGy·cm), liver biopsy (1175 mGy·cm), abdominal drainage (1125 mGy·cm).
  • CT utilization factors ranged from 0.6 to 3.6.

Conclusions:

  • Provides procedure-specific CT dose distributions and utilization factors.
  • Data based on a large cohort and detailed categorization.
  • Aids in understanding and optimizing radiation exposure in interventional radiology.