[Ultrasonic tomography in the study of supra-aortic trunks]

Real time mode B echotomography completes ultrasound exploration of supra-aortic trunks. Continuous Doppler recording is essential for detection of vessels and identification of significant lesions. However, it cannot detect arterial wall lesions that have no effect on arterial blood flow but can be at the origin of migrating emboli. The latter can be visualized by echotomography, which localizes the lesion and allows evaluation of its morphologic and anatomic characteristics. The methodology of the examination and normal anatomic findings are summarized and the different types of lesion occurring in the supra-aortic trunks described. The limitations of echotomography are discussed and a description given of a semiology of vascular ultrasonic structures of emboligenic potential.