X-ray dose reduction in fluoroscopically guided electrophysiology procedures

Area of Science:

• Cardiology
• Medical Imaging
• Radiology

Background:

• Fluoroscopically guided electrophysiology (EP) procedures involve significant radiation exposure.
• Optimizing radiation dose while maintaining diagnostic image quality is crucial in EP interventions.
• Existing dose reduction strategies require careful evaluation for clinical efficacy.

Purpose of the Study:

• To assess the efficacy of a novel hierarchical dose reduction regime for fluoroscopy in EP procedures.
• To evaluate the impact of this regime on patient radiation dose and image quality.
• To determine the clinical acceptability of the modified dose strategy.

Main Methods:

• Implementation of a three-tiered fluoroscopy dose hierarchy in a cardiac EP laboratory.
• Phantom studies to evaluate image quality and patient skin dose in low-dose mode.
• Clinical assessment using questionnaires for subjective image quality in 52 cases.
• Analysis of procedural Dose Area Product (DAP) before (n=85) and after (n=150) implementation.

Main Results:

• Phantom studies confirmed adequate image quality for catheter visualization with reduced skin dose in low-dose mode.
• Clinical image quality was rated between "adequate" and "good" on average.
• The lowest dose level was used for 94% of the total fluoroscopy time.
• A significant 74% overall reduction in DAP rate was observed post-implementation.

Conclusions:

• The hierarchical dose regime is effective in reducing patient radiation doses during EP procedures.
• The implemented strategy is acceptable for routine clinical practice, balancing dose reduction and image quality.
• This approach offers a viable method for minimizing radiation exposure in fluoroscopically guided interventions.