Introduction to the 3D Reconstruction Function on DSA Equipment

The 3D Reconstruction feature is a groundbreaking advanced function built upon traditional DSA technology. While conventional DSA (Digital Subtraction Angiography) provides two-dimensional, projection-based images of blood vessels, 3D Reconstruction represents a significant leap forward. It uses computer processing to transform a series of 2D DSA images into a detailed three-dimensional model of the vasculature, offering physicians an unprecedented and multi-angled view for analysis.

Core Technical Principle

This function is typically enabled by a technology called Rotational DSA. The workflow is as follows:

Image Acquisition:

While contrast agent is injected, the C-arm rotates automatically at high speed (usually 180°-200°) around the patient's target area (e.g., head, heart).

During this rotation, the system acquires a sequence of numerous 2D DSA images from different angles, creating a large dataset of 2D images.

Data Reconstruction:

After acquisition, a high-performance computer workstation uses specialized volume reconstruction algorithms (such as Filtered Back Projection, FDK algorithm).

These algorithms convert the 2D projection data into a three-dimensional Volume Data set. This can be thought of as a digital model composed of countless tiny cubes (voxels), each containing information about its location and density.

3D Visualization:

Physicians can manipulate this 3D model, examine vascular structures from any angle, and utilize various post-processing tools for detailed analysis.

Primary Application Areas

Neurointerventional Radiology: The most extensive application area. Used for diagnosing and planning treatment for cerebral aneurysms, arteriovenous malformations (AVMs), arteriovenous fistulas (AVFs), and vascular stenosis.

Cardiac Intervention: Used for assessing coronary artery disease and diagnosing complex congenital heart diseases.

Peripheral Vascular Intervention: Used to evaluate stenosis or aneurysms in areas like the renal arteries, iliac arteries, and lower limb arteries.

Oncologic Intervention: Used to visualize the blood supply to tumors, guiding chemoembolization procedures.