Digital Subtraction Angiography Technique
BASIC EXPLANATION
DSA is a way of taking images of arteries, veins and organs of the body using complex computerised x-ray equipment. This usually requires an injection of a special ‘dye’ to highlight the blood supply to the legs, heart or other organ. The ‘dye’ is a clear liquid which shows on x-rays due to its high density. This ‘dye’ is harmless and will pass out of your body in your urine over the hours following your test.
ADVANCEMENT FROM TRADITIONAL ANGIOGRAPHY
In traditional angiography, we acquire images of blood vessels on films by exposing the area of interst with time-controlled x-ray energy while injecting contrast medium into the blood vessels.