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Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
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Cardiovascular magnetic resonance imaging, or CMRI, is a non-invasive diagnostic test that employs a magnetic field and radiofrequency waves to create precise images of the heart and arteries. It provides comprehensive information about cardiac anatomy, function, perfusion, and tissue characterization without ionizing radiation.IndicationsCMRI diagnoses various heart conditions, including tissue damage from heart attacks, ischemic heart disease, myocarditis, aortic issues (tears, aneurysms,...
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Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
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Introduction:Magnetic Resonance Imaging, or MRI, can include a specialized imaging technique of the urinary system known as Magnetic Resonance Urography (MRU). This radiation-free technique uses strong magnetic fields and radio waves to produce detailed images with the help of a computer. MRU is particularly effective for visualizing fluid-filled structures like the kidneys, ureters, and bladder.Applications of MRI in the Genitourinary SystemKidneys and Ureters: MRI detects tumors, cysts,...
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Related Experiment Video

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Making MR Imaging Child's Play - Pediatric Neuroimaging Protocol, Guidelines and Procedure
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Quiet Technology of MRI.

Yuichi Yamashita1

  • 1Toshiba Medical Systems Corporation.

Igaku Butsuri : Nihon Igaku Butsuri Gakkai Kikanshi = Japanese Journal of Medical Physics : an Official Journal of Japan Society of Medical Physics
|April 22, 2017
PubMed
Summary

Magnetic Resonance Imaging (MRI) noise reduction is crucial for patient comfort and advanced diagnostics. The Pianissimo™ mechanism significantly cuts MRI acoustic noise by over 30 dB using innovative hardware solutions.

Area of Science:

  • Medical Imaging
  • Acoustics Engineering

Background:

  • Advancements in Magnetic Resonance Imaging (MRI) technology have increased clinical applications, particularly for brain and heart imaging.
  • Higher static magnetic fields and gradient performance in MRI lead to increased acoustic noise, impacting patient experience and potentially limiting scan protocols.
  • Current noise reduction strategies for MRI are broadly categorized into pulse sequence optimization and hardware renovation.

Purpose of the Study:

  • To address the growing issue of acoustic noise in advanced MRI systems.
  • To evaluate the effectiveness of a novel hardware-based noise reduction mechanism for MRI.

Main Methods:

  • The study focuses on hardware renovation strategies for MRI noise reduction.
  • The Pianissimo™ mechanism is detailed, involving vacuum-encapsulation of the gradient coil to suppress both solid-borne and airborne sound.
Keywords:
PianissimoTMquiet technologysilent MRI

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  • This approach aims to control vibration at the source and prevent its propagation.

    • Main Results:

    • The Pianissimo™ mechanism achieves a significant noise reduction of 33 dB.
    • Unlike pulse sequence modifications, this hardware solution reduces acoustic noise across all MRI scan types.
    • The mechanism demonstrates adaptability to new MRI applications irrespective of the imaging technique.

    Conclusions:

    • The Pianissimo™ mechanism offers a robust solution for MRI acoustic noise reduction.
    • This technology enhances patient comfort and broadens the applicability of advanced MRI techniques.
    • Hardware-based noise suppression provides a universal and adaptable approach to mitigating MRI-related noise pollution.