| 摘要 |
<p>The invention relates to a method of imaging objects with a curved surface with coherent wave motion. The method comprises applying a transmission signal to a transducer (1.1, H) defining a curved transmission surface of a predetermined shape, and controlling the amplification and delay of the signal to be applied to the transducer (1.1, H) so that a wide unfocused beam is directed to the object; receiving echo from the object (O); and reconstructing an image of the object (O) through computation on the basis of the received echo information. To achieve rapid computation algorithm and improved resolution and to save computer capacity, among other things, the reconstruction of a sector image comprises (i) transformation of a curved geometry to a rectangular geometry; (ii) computing the image in the rectangular geometry using reconstruction algorithms developed for linear transducers (1); and (iii) returning to the curved geometry.</p> |
