title: Novel fabrication of a 2D ring array for real-time volumetric endoscopic ultrasound imaging.
abstract: The work presents the development of a forward-looking 2D ring array for real-time volumetric endoscopic ultrasonic imaging using a novel rotary-dicing method. The completed array has an inner diameter of 3.5 mm, outer diameter of 5 mm, and 50 equal-area elements distributed concentrically. With a single front matching layer and a light backing, the array shows a center frequency of 3.5 MHz, a fractional bandwidth of 48%, insertion loss of -21.6 dB and cross-talk between nearest neighbor elements of 35.3 dB. The beam profile, two-dimensional pulse-echo point spread response, and phantom imaging of the array were studied with the Field-II simulation package. These promising results suggest that the rotary-dicing technology is an effective way to fabricate 2D ring array.
authors.affiliation: School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430072, China; State Key Laboratory of Transducer Technology, Chinese Academy of Science, Shanghai, China.
authors.forename: Shiyue
authors.initials: S
authors.lastname: Sun
authors.affiliation: CallaghanInnovation, Wellington 5040, New Zealand.
authors.forename: Dawei
authors.initials: D
authors.lastname: Wu
authors.affiliation: School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430072, China; State Key Laboratory of Transducer Technology, Chinese Academy of Science, Shanghai, China. Electronic address: benpengzhu@hust.edu.cn.
authors.forename: Benpeng
authors.initials: B
authors.lastname: Zhu
authors.affiliation: School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430072, China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430072, China.
authors.forename: Shi
authors.initials: S
authors.lastname: Chen
authors.affiliation: School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430072, China.
authors.forename: Xiaofei
authors.initials: X
authors.lastname: Yang
keywords: 2D ring array; Endoscopic ultrasound; Rotary-dicing