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Updated: Sep 12, 2026
Non-fluoroscopic Catheter Tracking for Fluoroscopy Reduction in Interventional Electrophysiology
Published on: May 26, 2015
Efficacy and Safety of a Novel Filtering Function to Reduce Radiation Exposure During Catheter Ablation for Atrial
Nobuhiro Suzuki1, Hidehiro Iwakawa1, Toshiharu Shinohara2
1Department of Cardiovascular Medicine, Akita University Graduate School of Medicine Akita Japan.
Background:
We aimed to assess the effectiveness and safety of a new filtering feature (Spot ROITM, Canon Medical Systems, Japan) in reducing radiation exposure during radiofrequency catheter ablation (RFCA) for atrial fibrillation (AF).
Methods And Results:
The study involved 2 steps: (1) an ex vivo experiment to evaluate the radiation reduction of Spot ROITM (SROI); (2) a clinical study with 69 consecutive patients undergoing initial AF-RFCA, divided into conventional collimation (CC) and SROI groups. All procedures used 3-dimensional electroanatomical mapping guidance. In the ex vivo model, SROI reduced radiation exposure by 66.7%. Clinically, all predefined procedures were successful, with similar complication rates between groups (CC vs. SROI, 3.2% vs. 2.6%; P=0.88). The dose-area product for patients (CC vs. SROI: 17.5 [12.8-25.4] vs. 5.6 [3.6-9.8] Gy · cm2, P<0.001) and scattered radiation at the operator's chest level (13.0 [10.3-18.5] vs. 3.0 [1.8-5.3] µSv, P<0.001) were significantly lower with SROI. Procedural time (150 [125-167] vs. 150 [120-183] min, P=0.89), fluoroscopy time (13.6 [10.7-18.9] vs. 12.6 [9.6-15.2] min, P=0.09), and short- to intermediate-term recurrence rates were comparable between groups.
Conclusions:
SROI reduced the radiation exposure of both patients and operators without compromising procedural success, complication rates or recurrence rates.
