Method for Increasing the Resolution of Medical Ultrasound B-Mode Images
Original Publication Date: 1987-Nov-01
Included in the Prior Art Database: 2005-Feb-02
A major limitation in present-day medical ultrasound imaging is low resolution, especially in the direction transversal to the beam. Under the proposed method, an odd number of ultrasonic RF-scans are combined. The first scan, labeled "O", is performed with the transducer being linearly moved over the region to be scanned, whereby transducer axis and direction of movement are mutually perpendicular. The sampled and digitized RF-data obtained from this scan are stored in a memory. A successive scan, labeled k (-n < k < n; n, k are integers; n > 1, k unequal 0), is performed by again moving the transducer over the region of interest along the same straight line, but inclining the axis of the transducer with respect to the direction of movement by an angle of 90o + k x a.