Decrease in patient radiation exposure by a tantalum filter during electrophysiological procedures

Pier Luca Rossi, Matteo Mariselli, Ivan Corazza, David Bianchini, Mauro Biffi, Cristian Martignani, Romano Zannoli, Giuseppe Boriani

Research output: Contribution to journalArticlepeer-review


Aim: Minimization of X-ray exposure remains a primary issue in cardiac electrophysiology. The effectiveness of X-ray beam filtration during cardiac electrophysiological procedures was therefore studied, using a 0.05-mm-thick tantalum (Ta) foil, as a filter on the primary X-ray beam, to reduce the patient dose without degradation of image quality. Method: Preliminary tests were made on a phantom developed with polymethylmethacrylate, catheters, and guide wires. The filter was then used in patients during cardiac procedures. Identical patient images were obtained with and without the Ta filter insertion and the ratio between image quality and patient dose was evaluated. Changes in patient dose and signal-to-noise ratio, as image quality index were measured on the phantom and in patients. Results and Conclusions: When the Ta filter was used, the mean effective individual patient dose decreased by 3 to 40% (mean reduction = 27%), with no perceivable difference in image quality estimated by electrophysiologists. This Ta filter may be useful to limit the radiation exposure of patients and operators during cardiac procedures.

Original languageEnglish
JournalPACE - Pacing and Clinical Electrophysiology
Issue numberSUPPL. 1
Publication statusPublished - Mar 2009


  • Radioprotection
  • Roentgenography x-ray-guided procedures
  • X-ray exposure

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine


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