MATLAB PROJECTS
Miniaturized
High-Resolution Integrated 360° Electronic Radial Ultrasound Endoscope for
Digestive Tract Imaging
Abstract:
To improve the accuracy and operating flexibility of digestive
diagnostic applications in situ, this paper demonstrates the design,
fabrication, and evaluation of a miniaturized high-resolution integrated 360°
electronic radial ultrasound endoscope. To improve the uniformity between
elements of the radial array transducer, an optimal fabrication procedure based
on a flexible matching layer was developed. The radial ultrasound endoscope has
a 128.3° 5-million-pixel camera module integrated with an approximately 8-MHz
128-element radial ultrasonic array in a package with an outer diameter of 9.5
mm. The results showed that the array has a center frequency of 8.2 MHz, a
-6-dB fractional bandwidth of 83.4%, and a two-way insertion loss of 39.62 dB at
the center frequency. Annulus and wire phantoms can be distinctly imaged with
the radial array. Printed eight-point font can be distinctly imaged with both a
large view and a 3-18-mm depth of field in lumen short-range optical imaging. A
porcine esophagus can be distinctly imaged in vitro with the integrated
endoscope. The results indicate that the fabrication method based on a flexible
matching layer can achieve high uniformity between elements of a radial array
transducer. In addition, the proposed ultrasound endoscope demonstrates a good
image resolution.
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