Intravenous aortography after aortic dissection repair

Eleven patients were studied after aortic dissection repair, using a technique of intravenous angiography with a line-scanned projection radiography prototype. A computed tomographic scanner was modified to produce line-scanned projection images of the aorta, using temporal or dual energy subtraction in combination with intravenous injection of diatrizoate. Excellent visualization of the Dacron graft, persistent intimal flaps, and aneurysmal dilation of the aorta were obtained in nine patients. Patient respiration when temporal subtraction was used and prolonged circulation time contributed to the two inadequate studies.