3D localization from 2D X-ray projection.

Area of Science:

• Medical Imaging
• Cardiovascular Interventions
• Computational Anatomy

Background:

• X-ray fluoroscopy is standard for cardiology procedures but lacks depth perception for structural heart interventions.
• Existing 3D guidance methods are often radiation-intensive, time-consuming, or expensive.

Purpose of the Study:

• To develop a simple, accurate 3D localization method using a single monoplane X-ray projection and a co-registered centerline model.
• To improve depth perception and guidance for structural heart interventions.

Main Methods:

• Generated 3D anatomic surface models and centerlines from preprocedural imaging.
• Co-registered models and localized 2D working points in 3D by minimizing projection line angles.
• Assessed accuracy using phantom and patient data during embolic protection system placement.

Main Results:

• Successfully localized 2D working points in 3D patient anatomy from monoplane X-ray.
• Achieved average accuracy of 1.6 mm (±0.8 mm) in 3D phantoms.
• Achieved average accuracy of 2.7 mm (±1.3 mm) in patient data.

Conclusions:

• Co-registered centerline models enable reliable 3D localization from single X-ray projections for TAVR device placement.
• The method shows promise for broader vascular interventions and integration with automated detection techniques.