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Local reference levels and organ doses from pediatric cardiac interventional procedures.

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Pediatric interventional cardiology (IC) procedures result in high radiation doses, particularly for newborns. Effective doses varied widely, with angioplasty procedures showing the highest levels, underscoring the need for dose reduction strategies.

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Area of Science:

  • Medical Physics
  • Pediatric Cardiology
  • Radiological Protection

Background:

  • Interventional cardiology (IC) procedures deliver higher radiation doses than conventional radiology, posing risks to pediatric patients.
  • Assessing radiation exposure in pediatric IC is crucial due to the vulnerability of young patients.

Purpose of the Study:

  • To evaluate current radiation exposure levels in a French pediatric interventional cardiology center.
  • To analyze dosimetric data (DAP, FT, NF) and organ doses in relation to patient weight.

Main Methods:

  • Analysis of 801 IC procedures (2010-2011) including dose area product (DAP), fluoroscopy time (FT), and cine frames (NF).
  • Organ dose evaluation using anthropomorphic phantoms and thermoluminescent dosimeters.
  • Effective dose (E) calculation using DAP and PCXMC 2.0 software.

Main Results:

  • Significant variations in DAP, FT, and NF were observed across procedures and weight groups.
  • High lung and esophageal doses were noted, especially in newborns.
  • Effective doses ranged from 0.3 to 23 mSv (diagnostic) and 0.1 to 48.4 mSv (therapeutic), with angioplasty procedures averaging 13 mSv.

Conclusions:

  • Pediatric IC procedures lead to substantial radiation doses, with notable variations.
  • There is a critical need to establish reference levels and minimize radiation exposure for children undergoing IC procedures.