| 摘要 |
A method for automatic Doppler angle estimation based on the B-mode and color flow (if available) image. The method uses an algorithm for automatic vessel slope measurement which first finds an optimal initial point (42) within the sample volume or range gate, and then searches (52) for the most reliable pixel points (near or far walls) based on a combination of intensity-only and intensity-difference thresholds, before performing a slope estimation (54,56). B-mode intensity data and, optionally, color flow velocity (44-50) or power data (before gray/color mapping) are used. The algorithm may also be applied to methods for automatic tracking of vessel diameter and flow rate calculations, although the primary objective is to achieve automatic Doppler angles estimation (58-62) in an ultrasound scanner. <IMAGE> |
