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Related Experiment Videos

Ultrasonic reflection mode computed tomography through a skull bone.

J Ylitalo1, J Koivukangas, J Oksman

  • 1Department of Electrical Engineering, University of Oulu, Finland.

IEEE Transactions on Bio-Medical Engineering
|November 1, 1990
PubMed
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This study introduces an ultrasonic reflection-mode CT method for transskull brain imaging. The technique achieves a resolution better than 3 mm, offering potential for pediatric brain diagnosis.

Area of Science:

  • Medical Imaging
  • Biomedical Engineering
  • Ultrasound Technology

Background:

  • Transskull imaging of the brain presents challenges due to ultrasound wave attenuation and distortion by the skullbone.
  • Current imaging modalities may have limitations in pediatric brain diagnosis and postoperative follow-up.
  • Developing non-invasive, high-resolution imaging techniques for brain structures through the skull is crucial.

Purpose of the Study:

  • To develop and evaluate an ultrasonic reflection-mode computed tomography (CT) method for transskull brain imaging.
  • To assess the feasibility and resolution of this method for imaging through human skullbone.
  • To explore the clinical significance of this technique for pediatric brain diagnosis.

Main Methods:

  • Application of a single-transducer, single-scan ultrasonic reflection-mode CT method.

Related Experiment Videos

  • Utilizing an ordinary Fourier slice theorem for image reconstruction.
  • Compensation for ultrasound velocity changes caused by skullbone.
  • Experimental scanning of objects immersed in water with a 360-degree view, including imaging through a 3-4 mm thick skullbone piece attached to the transducer.

    • Main Results:

    • Achieved a two-point resolution better than 3 mm for transskull imaging using 1 MHz ultrasound.
    • Transskull images of brain specimens compared favorably with images obtained without bone interference.
    • Demonstrated the capability to compensate for ultrasound velocity changes due to skullbone.

    Conclusions:

    • The developed ultrasonic reflection-mode CT method is effective for transskull brain imaging.
    • The technique offers clinically significant potential for pediatric brain diagnosis and postoperative follow-up.
    • A clinical prototype imager is under development for diagnosing childhood brain diseases.