192 results about "Ultrasonic Endoscopy" patented technology

An ultrasonic endoscope comprises an insertion portion comprising a distal hard portion which has: an endoscopic observation unit; and an ultrasonic observation unit having ultrasonic transducers arranged circumferentially on an outer circumferential section of the distal hard portion, wherein the ultrasonic observation unit comprises an ultrasonic-wave transmission / reception unit having an tunnel-shaped path which has an inner circumferential surface formed as a backing layer; a distal block is arranged on a distal side in an axial direction of the distal hard portion with respect to a location where the ultrasonic-wave transmission / reception unit is arranged, and distal ends of respective members constituting the endoscopic observation unit are fixed to the distal block; and part of the members which constitute the endoscopic observation unit are fitted so as to be partially protruded from an inside diameter of the tunnel-shaped path toward an outer circumferential side thereof.

An ultrasonic endoscope in which the temperature rise can be suppressed with a reduced diameter. The ultrasonic endoscope includes: an ultrasonic transducer part including plural ultrasonic transducers; an exterior member for accommodating the ultrasonic transducer part; and a heat conducting part provided inside of the exterior member and respectively connected to the ultrasonic transducer part and an inner surface of the exterior member. It is preferable that the heat conducting part has a coefficient of thermal conductivity equal to or more than 10 W / (m·K). Further, it is preferable that one of the heat conducting member and the exterior member has an electric insulation property.

The invention relates to an annular-array ultrasonic endoscope probe, a preparation method thereof and a fixing rotating device. The probe comprises a metal cylinder located in the center and a plurality of piezoelectric array elements arranged around the metal cylinder and formed by cutting piezoelectric ceramic circular rings or monocrystalline circular rings. A backing material layer is equipped between the piezoelectric array elements and the metal cylinder. A matching material layer is covering on the outer sides of the piezoelectric array elements. Decoupling materials are filled among the piezoelectric array elements. The probe further comprises a plurality of coaxial cables correspondingly connected with the piezoelectric array elements; and annular grids sleeved on the metal cylinder, each having a gear-shaped structure and applied for arranging and separating the coaxial cables. By directly cutting piezoelectric ceramic circular rings or piezoelectric monocrystalline circular rings to make the piezoelectric array elements, the probe provided in the invention prevents the problems generated when a multi-layer material with a certain thickness is forcibly reeled into a cylindrical shape in a conventional method and characterized in that the array elements are not coaxially arranged; the array elements on the interface positions are not aligned; a conventional probe is easy to be damaged, disengaged and broken, etc.

A composite piezoelectric material capable of reducing a peak temperature of a vibrator array to be used for transmitting or receiving ultrasonic waves in ultrasonic imaging. The composite piezoelectric material includes: plural piezoelectric materials arranged along a flat surface or curved surface; and an anisotropic heat conducting material having a higher coefficient of thermal conductivity in at least one direction and provided between the plural piezoelectric materials and / or at outer peripheries of the plural piezoelectric materials.