Abstract
Objectives
To compare image quality, apparent diffusion coefficient (ADC), and intravoxel incoherent motion (IVIM)-derived parameters between turbo spin-echo (TSE)-diffusion-weighted imaging (DWI) and echo-planar imaging (EPI)-DWI of the head and neck.
Methods
Fourteen volunteers underwent head and neck imaging using TSE-DWI and EPI-DWI. Distortion ratio (DR), signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), ADC and IVIM-derived parameters were compared between the two techniques. Bland-Altman analysis was performed to analyse reproducibility between the quantitative parameters of TSE-DWI and EPI-DWI.
Results
DR of TSE-DWI was significantly smaller than that of EPI-DWI. SNR and CNR of TSE-DWI were significantly higher than those of EPI-DWI. ADC and IVIM-derived parameters of TSE-DWI showed higher values than those of EPI-DWI, although the difference was not significant. Bland-Altman analysis showed wide limits of agreement between the two sequences.
Conclusion
TSE-DWI can produce better image quality than EPI-DWI, while TSE-DWI possibly exhibits different values of quantitative parameters. Therefore, TSE-DWI could be a good alternative to EPI-DWI for patients sensitive to distortion. However, it is not recommended to use both TSE-DWI and EPI-DWI on follow-up.
Key points
• Head and neck DWI is especially sensitive to magnetic inhomogeneity.
• The distortion of images was less with TSE-DWI than with EPI-DWI.
• TSE-DWI can possibly exhibit higher ADC and IVIM-derived parameters than EPI-DWI.
• Bland-Altman analysis showed unacceptable LoA in quantitative analysis between TSE-DWI and EPI-DWI.
• It is not recommended to use both TSE-DWI and EPI-DWI for follow-up.
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Abbreviations
- ADC:
-
Apparent diffusion coefficient
- D:
-
Pure diffusion coefficient
- DR:
-
Distortion ratio
- DWI:
-
Diffusion-weighted imaging
- EPI:
-
Echo-planar imaging
- f:
-
Perfusion fraction
- IVIM:
-
Intravoxel incoherent motion
- SENSE:
-
Sensitivity encoding
- TSE:
-
Turbo spin-echo
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The scientific guarantor of this publication is Hidetake Yabuuchi.
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Mikayama, R., Yabuuchi, H., Sonoda, S. et al. Comparison of intravoxel incoherent motion diffusion-weighted imaging between turbo spin-echo and echo-planar imaging of the head and neck. Eur Radiol 28, 316–324 (2018). https://doi.org/10.1007/s00330-017-4990-x
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DOI: https://doi.org/10.1007/s00330-017-4990-x