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Variable Curvature Flexible Transducer for Abdominal Expandable Imaging.

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A new flexible ultrasound array dynamically expands field of view for better abdominal imaging. This technology improves visualization of organs and pathological conditions, offering significant clinical potential.

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Area of Science:

Medical Imaging
Ultrasound Technology
Biomedical Engineering

Background:

Expanding the field of view (FOV) in medical ultrasound is crucial for detecting tissue and organ abnormalities.
Conventional rigid ultrasound transducers have fixed imaging apertures determined during manufacturing.

Purpose of the Study:

To develop a flexible curvature abdominal array (FCAA) capable of dynamically expanding the FOV up to 120°.
To evaluate the imaging performance and clinical applicability of the novel FCAA.

Main Methods:

A 128-element, 3-MHz FCAA was designed using a double-cut process and two-component viscoelastic substrates (TCVSs).
A 3-D-printed push-pull device enabled a minimum curvature radius of 46 mm.
A rigid-flexible composite backing layer was employed to optimize mechanical flexibility and bandwidth.

Main Results:

The FCAA achieved high bandwidth (-6 dB to 67.6%) and excellent resolution (axial: 0.35 mm, lateral: 0.77 mm on phantom; axial: 0.36 mm, lateral: 1.02 mm at 120° FOV).
B-mode imaging of volunteer organs (kidneys, intestines, uterus, bladder) and Doppler imaging of a renal artery phantom demonstrated FCAA's efficacy.

Conclusions:

The developed FCAA offers dynamic FOV expansion for enhanced abdominal ultrasound imaging.
The technology shows significant potential for clinical value in abdominal and gynecological examinations.