Ultrasonic Doppler technique for imaging blood vessels.
Present ultrasonic Doppler flow detectors that use the Doppler effect on waves scattered from moving blood have provided useful information when directed by hand to trace the circulation of animals and man. By scanning with a highly directive flow detector, the areas of flow can be localized. Images can be formed of the interior of blood vessels. These images have the appearance of arteriograms and venograms made by dye contrast radiography, but have none of its hazards. The resolution appears adequate for useful images.
D001783:Blood Flow Velocity; D001808:Blood Vessels; D006801:Humans; D008722:Methods; D014159:Transducers; D014465:Ultrasonics / Q000295:instrumentation; D014463:Ultrasonography; D014652:Vascular Diseases / Q000175:diagnosis