Intraoperative ultrasound arteriography with the "Coded Harmonic Angio" technique - Report of three cases

The result of combining the ultrasound Coded Excitation method and an ultra sound contrast agent (UCA), the Coded Harmonic Angio (CHA) technique provid es arterial images with exceptional spatial, temporal, and contrast resolut ion that are comparable to those produced by conventional digital subtracti on angiography. The authors report on their experience with intraoperative ultrasound arteriography performed using the transdural CHA technique in th ree patients: one harboring a meningioma, another with a middle cerebral ar tery aneurysm, and a third with an arteriovenous malformation. The present study demonstrates how intraoperative cerebral ultrasound arteriography can be applied to assess the adequacy of neurovascular procedures without the presence of an experienced operator.