Aortic aneurysm - Transverse view of the aneurysm (circled). Actual "free" lumen, however,
is only a small portion of the aorta (anechogenic part of the aorta, the dash line shows
its diameter) . The rest of the aortic cavity is filled with a thrombus.
Aortic dissection - Probe shows two cavities inside aorta. One is the real (initial) lumen and the other was created newly by the blood flowing into the wall of the aorta.
Aortic dissection - In the sagittal section we see 2 cavities, one of
them originated from blood flow penetration into the aortic wall.