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Accelerating knee MR imaging: Compressed sensing in isotropic three-dimensional fast spin-echo sequence.

Seung Hyun Lee1, Young Han Lee2, Jin-Suck Suh2

  • 1Department of Radiology, Research Institute of Radiological Science, YUHS-KRIBB Medical Convergence Research Institute, and Severance Biomedical Science Institute, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul 03722, Republic of Korea; Department of Radiology, National Health Insurance Service Ilsan Hospital, 100 Ilsan-ro, Ilsandong-gu, Goyang-si, Gyeonggi-do 10444, Republic of Korea.

Magnetic Resonance Imaging
|November 7, 2017
PubMed
Summary
This summary is machine-generated.

Compressed sensing (CS)-3D-fast spin-echo (FSE) knee MRI significantly reduces scan time while maintaining acceptable image quality. Diagnostic performance for meniscal lesions remains high, making CS-3D-FSE a viable alternative for knee imaging.

Keywords:
Compressed sensingKneeMagnetic resonance imagingParallel imagingSparsity

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Area of Science:

  • Radiology
  • Medical Imaging
  • Magnetic Resonance Imaging

Background:

  • Conventional 3D-fast spin-echo (FSE) sequences for knee MRI are time-consuming.
  • Compressed sensing (CS) is an advanced technique that allows for faster image acquisition.

Purpose of the Study:

  • To compare the image quality of compressed sensing (CS)-3D-fast spin-echo (FSE) with conventional 3D-FSE for knee MRI.
  • To evaluate the diagnostic performance of CS-3D-FSE for meniscal lesions.

Main Methods:

  • Knee MRIs from 43 patients were acquired using both conventional and CS-3D-FSE sequences.
  • Image quality was assessed using objective metrics (correlation coefficient, RMSE, SSIM, SNR, CNR) and subjective scales.
  • Diagnostic agreement for meniscal lesions was evaluated.

Main Results:

  • CS-3D-FSE reduced scan time by approximately 35%.
  • Objective image quality metrics showed strong correlation and acceptable RMSE/SSIM between sequences.
  • No significant differences in SNR/CNR were found, though cartilage-subchondral bone delineation was inferior with CS.
  • Diagnostic agreement for meniscal lesions was very good (κ=0.943-1).

Conclusions:

  • CS-3D-FSE provides acceptable image quality for knee MRI, significantly reducing acquisition time.
  • The technique demonstrates high diagnostic agreement for meniscal lesions.
  • CS-3D-FSE is a promising alternative to conventional 3D-FSE for knee imaging.