Scholarlink

Background <p>To compare subjective and objective image quality and resolution between time-optimized standard knee MRI (sMRI) with image quality-optimized DL-enhanced (DL-MRI) at 3 Tesla.</p> Methods <p>A retrospective single-centre study of 150 knee MRI examinations (75 sMRI, 75 DL-MRI) was conducted. Protocols included Proton density–weighted sequence with fat suppression (PD-FS) (coronal/sagittal/axial), T1 (coronal or sagittal), and T2 (axial) optimized for time in sMRI and for image quality in DL-MRI. Three blinded readers with different levels of experience rated overall image quality, anatomical delineation, fat saturation, motion artefacts, and foreign-body artefacts on 5-point Likert scales. Quantitative analysis was performed to calculate SNR, CNR, and generalised metrics (gSNR, gCNR). Group differences were assessed using two-sided Welch’s t-tests.</p> Results <p>Readers rated DL higher in nearly all categories and sequences, with mean gains of ~ 0.48–0.70 for overall image quality and ~ 0.38–0.54 for anatomical delineation (all <i>p</i> ≤ 0.001). Fat saturation improved for PD-FS coronal and axial, motion artefacts improved for PD-FS coronal and sagittal (and slightly for axial), and foreign-body artefacts were comparable. Quantitatively, PD-FS showed higher muscle SNR and higher gSNR/gCNR with DL (bone SNR non-significant); T2 showed higher bone SNR and higher CNR/gCNR but lower muscle SNR/gSNR; and T1 showed lower SNR/gSNR with preserved CNR. Compared with sMRI, DL-MRI achieved a twofold improvement in in-plane resolution (0.4 × 0.4&#xa0;mm² vs. 0.2 × 0.2&#xa0;mm²) and reduced slice thickness (3.0&#xa0;mm vs. 2.5&#xa0;mm. and down to 1.0&#xa0;mm for T2-weighted sequences), while slightly shortening total scan time (10:14&#xa0;min vs. 9:30&#xa0;min).</p> Conclusion <p>DL-MRI provided superior image quality and higher resolution over time-optimized standard knee MRI at 3 Tesla.</p> Trial registration <p>Not applicable.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Optimizing high-resolution knee MRI at 3 tesla: conventional acceleration versus deep learning reconstruction

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年3月3日

查看全文
  • Dominik Deppe,
  • Markus Herbert Lerchbaumer,
  • Khalid M. Baghdadi,
  • Hassan Ali Alyousef,
  • Leila Vivien Nitschke,
  • David Kohnert,
  • Dominik Geisel,
  • Andreas Pohlmann,
  • Moritz Wagner,
  • Thula Walter-Rittel

摘要

Background

To compare subjective and objective image quality and resolution between time-optimized standard knee MRI (sMRI) with image quality-optimized DL-enhanced (DL-MRI) at 3 Tesla.

Methods

A retrospective single-centre study of 150 knee MRI examinations (75 sMRI, 75 DL-MRI) was conducted. Protocols included Proton density–weighted sequence with fat suppression (PD-FS) (coronal/sagittal/axial), T1 (coronal or sagittal), and T2 (axial) optimized for time in sMRI and for image quality in DL-MRI. Three blinded readers with different levels of experience rated overall image quality, anatomical delineation, fat saturation, motion artefacts, and foreign-body artefacts on 5-point Likert scales. Quantitative analysis was performed to calculate SNR, CNR, and generalised metrics (gSNR, gCNR). Group differences were assessed using two-sided Welch’s t-tests.

Results

Readers rated DL higher in nearly all categories and sequences, with mean gains of ~ 0.48–0.70 for overall image quality and ~ 0.38–0.54 for anatomical delineation (all p ≤ 0.001). Fat saturation improved for PD-FS coronal and axial, motion artefacts improved for PD-FS coronal and sagittal (and slightly for axial), and foreign-body artefacts were comparable. Quantitatively, PD-FS showed higher muscle SNR and higher gSNR/gCNR with DL (bone SNR non-significant); T2 showed higher bone SNR and higher CNR/gCNR but lower muscle SNR/gSNR; and T1 showed lower SNR/gSNR with preserved CNR. Compared with sMRI, DL-MRI achieved a twofold improvement in in-plane resolution (0.4 × 0.4 mm² vs. 0.2 × 0.2 mm²) and reduced slice thickness (3.0 mm vs. 2.5 mm. and down to 1.0 mm for T2-weighted sequences), while slightly shortening total scan time (10:14 min vs. 9:30 min).

Conclusion

DL-MRI provided superior image quality and higher resolution over time-optimized standard knee MRI at 3 Tesla.

Trial registration

Not applicable.