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Radiation exposure in CT-guided interventions.

Roman Kloeckner1, Daniel Pinto dos Santos, Jens Schneider

  • 1Department of Diagnostic and Interventional Radiology, Johannes Gutenberg-University, Langenbeckstraße 1, 55131 Mainz, Germany.

European Journal of Radiology
|September 21, 2013
PubMed
Summary
This summary is machine-generated.

Radiation exposure during computed tomography (CT)-guided interventions is mainly from pre- and post-procedural scans, not the intervention itself. This study proposes preliminary dose reference levels and reduction strategies.

Keywords:
Image-guided biopsyRadiation dosageRadiation protectionRadiology, InterventionalTomography, Spiral computed

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Area of Science:

  • Medical Imaging
  • Interventional Radiology
  • Radiation Dosimetry

Background:

  • Computed tomography (CT)-guided interventions are increasingly common.
  • Radiation exposure is a concern for patients undergoing these procedures.
  • Establishing dose reference levels is crucial for patient safety.

Purpose of the Study:

  • To investigate radiation exposure during CT-guided interventions.
  • To establish preliminary reference dose levels for various procedures.
  • To discuss strategies for reducing radiation dose.

Main Methods:

  • Analysis of 1576 CT-guided procedures in 1284 patients over 4.5 years.
  • Inclusion of procedures like drainage, biopsies, radiofrequency/microwave ablations (RFA/MWA), pain blockages, and vertebroplasties.
  • Data analysis included scanner settings, overall doses, and doses from planning, intervention, and control CT series.

Main Results:

  • 85% of total radiation dose occurred during pre- and post-interventional CT series.
  • Single slice acquisition resulted in lower doses (37 mGy cm) compared to continuous CT-fluoroscopy (153 mGy cm).
  • Highest doses were observed in complex procedures like liver RFA/MWA, vertebroplasty, and lung RFA/MWA.

Conclusions:

  • Preliminary reference levels for radiation exposure in CT-guided interventions are suggested.
  • Strategies for dose reduction are discussed.
  • A multicenter registry is needed for definitive reference levels.