A 100-element Ultrasonic Circular Array For Endoscopic Application In Medicine And NDT

We present new developed ultrasonic (us) circular arrays for endoscopic application in medicine and NDT. The arrays consist of 100 miniaturized strip elements. The diameter of the arrays is just 10 mm. The arrays are conceived for frequencies between 3.5 and 7.5 MHz, the bandwidth has an amount of 50%. Monochromatic and broadband simulations of the soundfield are performed before manufacturing. Furthermore the process of manufacturing is discussed and partially depicted. We present the final results and us-images obtained from wire phantoms to determine the range and lateral resolution, from tissue aquivalent phantoms representing medical application and from special test specimens representing NDT- Application.