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Phased array coils for upper extremity MRA

J W Monroe1, P Schmalbrock, D G Spigos

  • 1Department of Radiology, Ohio State University, Columbus, USA.

Magnetic Resonance in Medicine
|February 1, 1995
PubMed
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A new phased array coil enhances upper extremity vascular imaging for dialysis patients. This improved signal-to-noise ratio (SNR) allows for clearer visualization of blood vessels throughout the entire arm.

Area of Science:

  • Medical Imaging
  • Biomedical Engineering
  • Vascular Imaging

Background:

  • Dialysis patients often require imaging of upper extremity vasculature.
  • Existing imaging methods may have limitations in signal-to-noise ratio (SNR) for detailed vascular assessment.
  • A dedicated coil can potentially improve image quality and diagnostic capabilities.

Purpose of the Study:

  • To develop and evaluate a phased array coil for improved upper extremity vascular imaging.
  • To assess the signal-to-noise ratio (SNR) improvements offered by the new coil compared to the body coil.
  • To demonstrate the coil's utility in visualizing upper extremity vasculature using advanced imaging techniques.

Main Methods:

  • Construction of a specialized phased array coil for upper extremity imaging.

Related Experiment Videos

  • Quantitative SNR measurements on a homogeneous phantom, comparing the phased array coil with the body coil at various depths.
  • In vivo SNR measurements in healthy volunteers.
  • Acquisition of 2D-time-of-flight (2DTOF) angiography images of the upper extremity vasculature.
  • Assessment of blood flow velocity using CINE-phase contrast imaging.

    • Main Results:

    • The phased array coil demonstrated significant SNR improvement over the body coil, with a factor of 7 near the coil and a factor of 2 at a depth of 6-7 cm.
    • In vivo SNR measurements corroborated the phantom findings.
    • 2D-time-of-flight (2DTOF) angiography successfully generated images of the upper extremity vasculature.
    • CINE-phase contrast imaging allowed for the assessment of blood flow velocity.

    Conclusions:

    • The developed phased array coil provides superior SNR for upper extremity vascular imaging in dialysis patients.
    • The coil enables comprehensive imaging of the entire upper extremity vasculature.
    • This technology holds promise for enhanced diagnosis and monitoring of vascular conditions in dialysis patients.