Furthermore, DSA is likely to limit the use of older non-invasive tests (e. g., periorbital ultrasonography and thermography), because of greater sensitivity and specificity for diagnostic purposes. Digital subtraction angiography also facilitates the detection of abnormalities such as ulcerated plaques, extra-cranial occlusions, stenosis, and aneurysms. Coupled with the above factors, increasing awareness of people for accurate and precise diagnosis is an additional factor that is anticipated to drive the global digital subtraction angiography market.