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DIAGNOSTIC REFERENCE LEVELS AND COMPLEXITY INDICES IN INTERVENTIONAL RADIOLOGY.

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This study establishes diagnostic reference levels (DRLs) for hepatic chemoembolisation, iliac stent placement, and femoropopliteal revascularisation using complexity indices. These DRLs help optimize patient radiation doses in interventional radiology.

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Area of Science:

  • Interventional Radiology
  • Medical Physics
  • Radiation Protection

Background:

  • Diagnostic Reference Levels (DRLs) are crucial for optimizing radiation doses in medical imaging.
  • Interventional radiology (IR) procedures involve complex techniques with varying radiation exposure.
  • Complexity Indices (CIs) can help standardize radiation dose assessment in IR.

Purpose of the Study:

  • To establish typical Diagnostic Reference Levels (DRLs) for hepatic chemoembolisation (HC), iliac stent placement (ISP), and femoropopliteal revascularisation (FR).
  • To investigate the utility of Complexity Indices (CIs) in determining DRLs for IR procedures.
  • To estimate effective dose and patient stochastic effects using Dose Area Product (DAP) and conversion factors.

Main Methods:

  • Collected Dose Area Product (DAP), Reference Air Kerma (Ka,r), and fluoroscopy time (FT) data for 218 patients undergoing HC, ISP, and FR.
  • Assigned Complexity Indices (CIs) to each procedure to facilitate DRL extraction.
  • Calculated effective dose using DAP values and literature-derived E/DAP conversion factors.

Main Results:

  • Established DRL values for DAP: 141 Gy*cm² (HC), 130 Gy*cm² (ISP), and 28 Gy*cm² (FR).
  • Established DRL values for Ka,r: 634.6 mGy (HC), 300.1 mGy (ISP), and 112.0 mGy (FR).
  • Established DRL values for FT: 15.3 min (HC), 12.4 min (ISP), and 17.9 min (FR).

Conclusions:

  • Complexity Indices (CIs) are valuable tools for optimizing DRLs in interventional radiology.
  • The established DRLs provide benchmarks for radiation dose management in these specific IR procedures.
  • This study contributes to patient safety by offering data for dose optimization in common IR interventions.