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Related Experiment Videos

A removable ultrasonic collimator for improving resolution

E Yeh

    Journal of Clinical Ultrasound : JCU
    |March 1, 1975
    PubMed
    Summary
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    A novel ultrasonic collimator enhances ultrasound imaging resolution for superficial small organs. This device narrows the ultrasonic beam, improving detail, though it slightly reduces intensity, which can be managed.

    Area of Science:

    • Medical Imaging
    • Biomedical Engineering
    • Acoustics

    Background:

    • High-resolution imaging of superficial small organs is crucial for accurate diagnosis.
    • General-purpose transducers often lack the necessary resolution for detailed examination of small, near-surface structures.
    • Existing methods for improving ultrasound resolution may be complex or costly.

    Purpose of the Study:

    • To describe a novel, removable ultrasonic collimator designed to enhance image resolution.
    • To evaluate the effectiveness of the collimator in improving ultrasound studies of superficial small organs.
    • To assess the impact of the collimator on ultrasound beam characteristics and signal intensity.

    Main Methods:

    • Development of a removable collimator featuring a central 6 mm focusing lens surrounded by air.

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  • Attachment of the collimator to a general-purpose ultrasound transducer.
  • Transmission of only the central ultrasonic beam through the focusing lens.
  • Evaluation of changes in beam width and image resolution.

    • Main Results:

    • The collimator effectively narrows the ultrasonic beam by transmitting only the central portion.
    • Significant improvement in image resolution was observed for ultrasound studies of superficial small organs.
    • A reduction in ultrasound intensity was noted as a drawback.
    • The reduction in intensity can be compensated by increasing transducer output or system gain.

    Conclusions:

    • The described removable ultrasonic collimator is an effective accessory for improving ultrasound resolution.
    • It offers a simple and adaptable solution for enhanced imaging of small superficial structures.
    • Potential applications include improved diagnostic accuracy in various medical specialties.