Development of a mechanical scanning device with high-frequency ultrasound transducer for ultrasonic capsule endoscopy

Xingying Wang, Vipin Seetohul, Ruimin Chen, Zhiqiang Zhang, Ming Qian, Zhehao Shi, Ge Yang, Peitian Mu, Congzhi Wang, Zhihong Huang, Qifa Zhou, Hairong Zheng, Sandy Cochran, Weibao Qiu (Lead / Corresponding author)

    Research output: Contribution to journalArticlepeer-review

    39 Citations (Scopus)


    Wireless capsule endoscopy has opened a new era by enabling remote diagnostic assessment of the gastrointestinal tract in a painless procedure. Video capsule endoscopy is currently commercially available worldwide. However, it is limited to visualization of superficial tissue. Ultrasound (US) imaging is a complementary solution as it is capable of acquiring transmural information from the tissue wall. This paper presents a mechanical scanning device incorporating a high-frequency transducer specifically as a proof of concept for US capsule endoscopy (USCE), providing information that may usefully assist future research. A rotary solenoid-coil-based motor was employed to rotate the US transducer with sectional electronic control. A set of gears was used to convert the sectional rotation to circular rotation. A single-element focused US transducer with 39-MHz center frequency was used for high-resolution US imaging, connected to an imaging platform for pulse generation and image processing. Key parameters of US imaging for USCE applications were evaluated. Wire phantom imaging and tissue phantom imaging have been conducted to evaluate the performance of the proposed method. A porcine small intestine specimen was also used for imaging evaluation in vitro. Test results demonstrate that the proposed device and rotation mechanism are able to offer good image resolution ( ∼ 60μ text-m ) of the lumen wall, and they, therefore, offer a viable basis for the fabrication of a USCE device.

    Original languageEnglish
    Article number7915725
    Pages (from-to)1922-1929
    Number of pages8
    JournalIEEE Transactions on Medical Imaging
    Issue number9
    Early online date2 May 2017
    Publication statusPublished - Sept 2017


    • Capsule endoscopy
    • high-FREQUENCY ultrasound
    • imaging of GI tract
    • mechanical scanning device
    • ultrasound capsule endoscopy

    ASJC Scopus subject areas

    • Software
    • Radiological and Ultrasound Technology
    • Computer Science Applications
    • Electrical and Electronic Engineering


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