| 摘要 |
PURPOSE:To improve the resolution and extend the visual field adjacent to an array type probe in which a plurality of vibrator elements are arranged along the convex face when an incident angle against an object on a beam central axis is deflected obliquely. CONSTITUTION:When a supersonic beam is sent from an array type probe 1 in which a plurality of vibrator elements 11-1m are arranged along a convex face, the vibrator element groups 11-1m, which are selected to form a transmitting beam when an incident angle against an object on the beam central axis is deflected obliquely, are transmitted in an unsymmetrical transmitting array by shifting by the quantity of element pitch proportional to the incident angle toward the deflecting direction, against the center of the probe 1. At the time of reception, more vibrator elements than those during transmission are used to form a reception beam as a reception array that is unsymmetrical against the beam central axis and has a large diameter and to phase it for visualization. |
