Interventional digital tomosynthesis from a standard fluoroscopy system using 2D-3D registration

Area of Science:

• Medical Imaging
• Interventional Radiology
• Image Processing

Background:

• Fluoroscopy is essential in interventional radiology but provides limited 2D visualization, often requiring nephrotoxic contrast agents.
• Current alternatives like cone-beam computed tomography involve high radiation doses and disrupt clinical workflow.

Purpose of the Study:

• To develop a 2D-3D image registration technique for generating digital tomosynthesis (DTS) slices using standard fluoroscopy equipment.
• To improve intraoperative guidance precision and visualize vasculature without high radiation or contrast agents.

Main Methods:

• Utilized 2D-3D image registration to create patient-anatomy-specific digital tomosynthesis (DTS) slices from fluoroscopy data.
• Developed an automated method to remove bone clutter and enhance image quality.

Main Results:

• Phantom studies demonstrated a 1133% improvement in contrast-to-noise ratio compared to standard fluoroscopy.
• Patient results successfully visualized key anatomical features, including the aorta, aortic bifurcation, and calcifications.

Conclusions:

• The proposed DTS method, integrated with 2D-3D image registration, offers a low-dose, workflow-compatible solution for enhanced intraoperative visualization in interventional radiology.
• This technique holds potential for improving guidance precision and reducing reliance on nephrotoxic contrast agents.