THE tortuosity, T, of a porous medium such as sandstone is a quantity that has been interpreted in various and sometimes conflicting ways, particularly its relation to porosity, ϕ, and formation ...

Computed tomography revealed a huge dilated tortuous aortic arch. Transthoracic echocardiography demonstrated aortic valve dilation, aneurysmal dilation of the ascending aorta with a high aortic ...