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Related Concept Videos

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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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Related Experiment Video

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Diffusion Imaging in the Rat Cervical Spinal Cord
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Multiplexed sensitivity-encoding diffusion-weighted imaging (MUSE) in diffusion-weighted imaging for rectal MRI: a

Maria El Homsi1, David D B Bates1, Yousef Mazaheri2

  • 1Department of Radiology, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY, 10065, USA.

Abdominal Radiology (New York)
|October 28, 2022
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Summary

Multiplexed sensitivity encoding (MUSE) DWI sequences, particularly MUSE b800, offer superior image quality and lesion conspicuity in rectal MRI compared to conventional single-shot echo planar imaging (ss-EPI). MUSE b800 also demonstrated the highest signal-to-noise ratio (SNR).

Keywords:
MUSE, diffusion-weighted imagingMagnetic resonance imagingRectal cancer

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Area of Science:

  • Radiology
  • Medical Imaging
  • Oncology

Background:

  • Rectal MRI is crucial for cancer staging and treatment planning.
  • Diffusion-weighted imaging (DWI) enhances lesion detection and characterization.
  • Optimizing DWI sequences is essential for improving diagnostic accuracy.

Purpose of the Study:

  • To compare the image quality, rectal contour, and lesion conspicuity of four different diffusion-weighted imaging (DWI) sequences.
  • To assess signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), and apparent diffusion coefficient (ADC) differences among these DWI sequences.
  • To determine the optimal DWI technique for rectal MRI.

Main Methods:

  • A retrospective analysis of 36 patients undergoing 3.0T rectal MRI.
  • Four DWI sequences were evaluated: ss-EPI (b800), MUSE (b800), MUSE (b1500), and FOCUS (b1500).
  • Image quality, rectal contour, and lesion conspicuity were independently scored by two radiologists; SNR, CNR, and ADC were quantitatively measured.

Main Results:

  • MUSE b800 significantly outperformed ss-EPI in image quality, rectal contour, and lesion conspicuity.
  • MUSE b800 and MUSE b1500 demonstrated superior lesion conspicuity compared to ss-EPI and FOCUS.
  • MUSE b800 achieved the highest SNR, while MUSE b1500 had the highest CNR. Significant ADC differences were noted between ss-EPI and other sequences.

Conclusions:

  • MUSE b800 provides improved image quality and rectal contour visualization over ss-EPI.
  • Both MUSE b800 and MUSE b1500 enhance tumor conspicuity compared to conventional ss-EPI.
  • MUSE sequences represent a valuable advancement for DWI in rectal MRI.