What Is DSA

Digital Subtraction Angiography (English name: Digital Subtraction Angiography, abbreviated as: DSA) is a new X-ray imaging system that is a combination of conventional angiography and computer image processing technology. Digital subtraction angiography requires the removal of interfering images overlapping with blood vessels in order to obtain clear blood vessel images, which is beneficial to disease diagnosis and interventional treatment operations. The basic content of subtraction technology is to subtract two images of the same part of the human body to obtain the difference between the two. The image without contrast agent is called a mask image or a mask. The image obtained after the contrast agent is injected It is called an imaging or filling image.