Chemical shift-encoded multishot EPI for navigator-free prostate DWI
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View abstract on PubMed
Summary
This summary is machine-generated.This study introduces a new Dixon 3-shot-EPI protocol for prostate MRI diffusion-weighted imaging (DWI). It significantly reduces geometric distortion and improves fat suppression compared to standard methods, enhancing cancer detection.
Area Of Science
- Radiology
- Medical Imaging
- Biophysics
Background
- Diffusion-weighted imaging (DWI) is crucial for prostate cancer detection.
- Standard single-shot EPI (ssh-EPI) suffers from geometric distortions and fat signal interference.
- Multishot EPI (mse-EPI) faces challenges with motion-induced phase variations.
Purpose Of The Study
- Introduce a navigator-free Dixon 3-shot-EPI protocol for prostate DWI.
- Overcome limitations of ssh-EPI, including geometric distortions and fat signal interference.
- Address phase variations in mse-EPI while enabling water/fat separation.
Main Methods
- Acquired DWI data from 7 healthy volunteers using Dixon 3-shot EPI and standard fat-suppressed ssh-EPI.
- Compared image quality via Likert scale ratings by two readers.
- Quantitatively compared apparent diffusion coefficient (ADC) values.
- Applied the protocol to two patients to assess clinical feasibility.
Main Results
- Dixon 3-shot EPI significantly reduced geometric distortion (p < 0.01) compared to ssh-EPI.
- No significant differences in edge definition, SNR, or overall image quality were observed.
- Dixon mse-EPI offered advantages like B0 map-driven distortion correction and superior fat suppression.
- Lesions were clearly identifiable in both protocols on ADC maps in patient data.
Conclusions
- The proposed Dixon 3-shot-EPI protocol is a promising alternative to ssh-EPI for prostate DWI.
- It offers reduced geometric distortions and improved fat suppression.
- The protocol addresses common DWI issues and enhances scanning flexibility for optimized imaging.
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