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"Rotation Overlap Method" for 3D Wiring in Chronic Total Occlusion
Calvin Leung1, Cheuk Bong Ho1, Ivan Wong1
1Division of Cardiology, Department of Medicine, Queen Elizabeth Hospital, Hong Kong SAR.
JACC. Case Reports
|March 21, 2025
Summary
The rotation overlap method enables 3D wiring using parallax, avoiding orthogonal projections. This technique precisely guides the wire tip to the target by observing relative proximity in fluoroscopic views.
Area of Science:
- Medical Imaging
- Interventional Radiology
- 3D Navigation
Background:
- Traditional 3D wiring relies on orthogonal projections, which can be complex and time-consuming.
- Accurate navigation of guidewires is crucial for successful interventional procedures.
Observation:
- The rotation overlap method utilizes parallax and a "rotation overlap rule" to determine spatial relationships between the wire shaft (WS) and target (TG).
- Closer proximity of WS-TG in a fluoroscopic view indicates the WS is anterior to the TG.
Findings:
- This method replaces orthogonal projections with a "WS-TG closer" criterion for spatial constraint.
- It involves resolving anterior/posterior relationships, optimizing WS-TG overlap, and precise wire tip (WT) direction based on four scenarios.
Implications:
- The rotation overlap method offers a simplified approach to 3D wiring, potentially improving procedural efficiency.
- This technique enhances guidewire navigation accuracy in complex vascular anatomies.
