Figure 3 Anterior and posterior three-dimensional volume-rendered computed tomography angiography views of brachiocephalic trunk kinkingVolume-rendered three-dimensional reconstructions of contrast-enhanced computed tomography angiography (CTA) of the aortic arch and supra-aortic trunks provide comprehensive spatial visualization of the marked kinking at the brachiocephalic trunk origin, the infrequent cause of partial subclavian steal in this case. (A) Anterior view depicts the sharp 90-degree angulation of the proximal brachiocephalic trunk (yellow/orange hue) immediately after arising from the aortic arch, with patent right common carotid and subclavian artery branches distally. (B) Posterior view emphasizes the tortuous proximal course of the brachiocephalic trunk (orange hue) relative to the anatomically straight right subclavian artery and unobstructed right vertebral artery origin, confirming no atherosclerotic involvement. CTA – computed tomography angiography.