[An Experimental Set-Up for Navigated-Contrast-Agent and Radiation Sparing Endovascular Aortic Repair (Nav-CARS
Zentralblatt Fur Chirurgie
|October 21, 2015
Summary
This study introduces real-time 3D navigation software for endovascular aneurysm repair (EVAR). The technology aids surgeons by integrating 3D vascular views with 2D imaging, potentially reducing contrast and radiation exposure.
Area of Science:
- Medical Imaging
- Endovascular Surgery
- Medical Device Technology
Background:
- Endovascular aneurysm repair (EVAR) has become a standard procedure for aortic aneurysms.
- Advancements in vascular imaging are crucial for the success of minimally invasive EVAR.
- Overlaying 3D vascular anatomy onto 2D angiographic views presents a challenge for surgeons.
Purpose of the Study:
- To develop real-time navigation software for EVAR procedures.
- To provide a 3D endoluminal view of the vascular system during EVAR.
- To improve the accuracy and safety of endovascular aneurysm repair.
Main Methods:
- Developed real-time navigation software using preoperative CT angiography for 3D reconstruction.
- Implemented volume-rendered segmentation for aortic anatomy.
- Utilized real-time landmark matching and continuous registration of guide-wire or stent position.
- Integrated fibre-optic sensor technology (fibre-Bragg navigation) with stent graft introducer sheaths.
Main Results:
- Demonstrated the feasibility of fibre-Bragg navigation in an experimental setting with patient-specific vascular models.
- Successfully achieved real-time 3D preoperative planning, registration, and virtual angioscopy simulation.
- The developed software provides a continuous 3D endoluminal view during the intervention.
Conclusions:
- The Nav-CARS-EVAR concept aims to reduce contrast media and radiation dose through 3D navigation.
- Further experimental studies are required to validate the accuracy of fibre-Bragg navigation before clinical application.
