The flow of the blood which passes by the organ of flow and the especially body of the fluid only measurement system null in order to display

摘要

The invention relates to a system and to a method for the measurement and presentation of flow movements in a fluid, particularly for determining blood perfusion in the superficial blood vessels of a body organ. The system includes a laser beam generating source (1), means (3, 6) for directing the laser beam (2) onto the body part to be examined and for moving the laser beam in a controlled fashion over the body part in accordance with a determined scanning pattern (8). This system also includes means (9) for receiving part of the laser beam reflected from the body part. Also included in the system are means (10, 7) for detecting the broadened frequency of the reflected portion of the laser beam, this spectral broadening being caused by the Doppler effect, for a large number of points along the path (8) scanned by the laser beam, this broadening of the frequency being used as a measurement of the magnitude of the superficial blood circulation in the examined body part (5) at these points.