Abstract
Objectives
To compare the image quality of high-resolution diffusion-weighted imaging (DWI) using multiplexed sensitivity encoding (MUSE) versus reduced field-of-view (rFOV) techniques in endometrial cancer (EC) and to compare the diagnostic performance of these techniques with that of dynamic contrast-enhanced (DCE) MRI for assessing myometrial invasion of EC.
Methods
MUSE-DWI and rFOV-DWI were obtained preoperatively in 58 women with EC. Three radiologists assessed the image quality of MUSE-DWI and rFOV-DWI. For 55 women who underwent DCE-MRI, the same radiologists assessed the superficial and deep myometrial invasion using MUSE-DWI, rFOV-DWI, and DCE-MRI. Qualitative scores were compared using the Wilcoxon signed-rank test. Receiver operating characteristic analysis was performed to compare the diagnostic performance.
Results
Artifacts, sharpness, lesion conspicuity, and overall quality were significantly better with MUSE-DWI than with rFOV-DWI (p < 0.05). The area under the curve (AUC) of MUSE-DWI, rFOV-DWI, and DCE-MRI for the assessment of myometrial invasion were not significantly different except for significantly higher AUC of MUSE-DWI than that of DCE-MRI for superficial myometrial invasion (0.76 for MUSE-DWI and 0.64 for DCE-MRI, p = 0.049) and for deep myometrial invasion (0.92 for MUSE-DWI and 0.80 for DCE-MRI, p = 0.022) in one observer, and that of rFOV-DWI for deep myometrial invasion in another observer (0.96 for MUSE-DWI and 0.89 for rFOV-MRI, p = 0.048).
Conclusion
MUSE-DWI exhibits better image quality than rFOV-DWI. MUSE-DWI and rFOV-DWI shows almost equivalent diagnostic performance compared to DCE-MRI for assessing superficial and deep myometrial invasion in EC although MUSE-DWI may be helpful for some radiologists.
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Abbreviations
- T2WI:
-
T2-weighted imaging
- DCE:
-
Dynamic contrast-enhanced
- EC:
-
Endometrial cancer
- DWI:
-
Diffusion-weighted imaging
- cDWI:
-
Conventional diffusion-weighted imaging
- EPI:
-
Echo-planar imaging
- rFOV:
-
Reduced field-of-view
- FOV:
-
Field-of-view
- MUSE:
-
Multiplexed sensitivity encoding
- MUSE-DWI:
-
Multiplexed sensitivity encoding diffusion-weighted imaging
- rFOV-DWI:
-
Reduced field-of-view diffusion-weighted imaging
- NEX:
-
Number of excitations
- SI:
-
Signal intensity
- ADC:
-
Apparent diffusion coefficient
- ROI:
-
Region of interest
- SNR:
-
Signal-to-noise ratio
- SD:
-
Standard deviation
- CNR:
-
Contrast-to-noise ratio
- ROC:
-
Receiver operating characteristic
- ICC:
-
Intraclass correlation coefficients
- AUC:
-
Area under the curve
- PPV:
-
Positive predictive value
- NPV:
-
Negative predictive value
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Takahiro Tsuboyama kindly provided statistical advice for this manuscript. One of the authors has significant statistical expertise.
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Ota, T., Tsuboyama, T., Onishi, H. et al. Diagnostic accuracy of MRI for evaluating myometrial invasion in endometrial cancer: a comparison of MUSE-DWI, rFOV-DWI, and DCE-MRI. Radiol med 128, 629–643 (2023). https://doi.org/10.1007/s11547-023-01635-4
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DOI: https://doi.org/10.1007/s11547-023-01635-4