Digital subtraction angiography (DSA) is a fluoroscopy technique used in interventional radiology to clearly visualize blood vessels in a bony or dense soft tissue environment. Images are produced using contrast medium by subtracting a "pre-contrast image" or mask from subsequent images, once the contrast medium has been introduced into a ...

Jan 21, 2025 · Digital subtraction angiography (DSA) is a fluoroscopic technique used extensively in interventional radiology for visualization of blood vessels. Radiopaque structures such as bones are digitally eliminated ("subtracted") from the image, thus allowing for an accurate depiction of the blood vessels.

The Digital Subtraction Angiography (DSA) technique can be applied to a fluoroscopy series (XA) to allow you to visualize blood vessels better. The pre-contrast image (so-called mask) is subtracted from the subsequent images in which the arteries/veins are filled with the contrast media and, thus, the bony or dense soft-tissue areas are removed ...

Digital subtraction angiography (DSA) is a new computer-assisted process which enables visualization of arterial structures after intravenous injection of contrast material.

Figure B shows a series of images acquired during a digital subtraction angiography examination performed using an anthropomorphic pelvis phantom. The first column shows the initial images that are used as a mask for subtraction from later images that …

We developed a new method for generating DSA images for coronary angiography, in which a mask frame that does not include blood vessels is created for every live frame. The motion artifacts in the DSA images were effectively reduced using our DSA method.

3D digital subtraction angiography (DSA) reconstruction from rotational 2D projection X-ray angiography is an important basis for diagnosis and treatment of intracranial aneurysms (IAs). The gold standard requires approximately 133 different ...

Jun 28, 2020 · Digital subtraction angiography (DSA) is a fluoroscopic technique mostly used in interventional radiology and endovascular surgery to selectively visualise contrast-filled blood vessels with the computer-aided subtraction of superimposed and background anatomy.

Aug 26, 2022 · Remasking is a post-processing technique used to improve misregistration artifact in digital subtraction angiography (DSA), where a frame taken after patient motion is selected as the new mask image for subtraction.

Mar 30, 2021 · Digital subtraction angiography (DSA) generates an image by subtracting a mask image from a dynamic angiogram. However, patient movement–caused misregistration artifacts can result in unclear DSA images that interrupt procedures.