Color Doppler study of the right common carotid artery (a) shows carotid artery aneurysm and mural thrombus partially occluding the lumen of the aneurysm (arrow). Color doppler study of the abdominal aorta of the same patient (b) shows a long segment abdominal aortic aneurysm and ectatic origin of the superior mesenteric artery (arrow).

Gray-scale ultrasound of the abdomen (a) shows mild bowel wall thickening (arrow) and multiple small mesenteric lymph nodes. Color Doppler (b) shows increased vascularity at the affected bowel segment (arrows).

(a) The origin of the superior mesenteric artery (SMA) is markedly narrowed (arrow). (b) A few sections caudally, the SMA is almost completely occluded with significant thickening of the arterial wall (arrow). The surrounding fat planes are indistinct due to surrounding fibrosis.

Computed tomography (CT) axial image of the lungs at the subcarinal level (a) shows marked stenosis of the left bronchus (arrow). Coronal CT reconstruction of the lung of the same patient after a few years (b) shows residual left bronchus stenosis (arrow) and partial collapse of the left upper lobe.

(a) T₁-weighted imaging shows morphologic changes of circumferential thickening of the descending aortic wall (arrow). (b) T₂-weighted image demonstrates high (bright) signal due to edema in the aortic wall. (c) The inflamed aortic wall is of higher signal than the blood within the aortic lumen on T₁-weighted imaging with fat saturation before the administration of gadolinium contrast media. (d) After the administration of contrast media, the marked enhancement of the inflamed aortic media and adventitia with relatively poor enhancement of the swollen intima can be seen, resulting in the “double ring” finding.

Post-contrast magnetic resonance imaging (MRI) of the heart (a) shows a giant aneurysm in the proximal left anterior descending artery (short black arrows) close to the left coronary sinus (long white arrow). Oblique sagittal reconstructed MRI of the heart (b) shows two giant right coronary artery aneurysms (short black arrows).

(a) Contrast media injection at the left common femoral artery reveals normal morphology (appropriate size and tapering) of the arteries of the proximal lower extremity. (b) Injection at the level of the above-knee popliteal artery shows occlusion of the popliteal artery with flow into collateral vessels (arrow). (c) Occlusion of all primary below knee runoff arteries with development of multiple “cork screw” collateral arteries (arrows).