Single-Shot Echo-Planar Imaging and Multi-Shot Echo-Planar Imaging Sequences in 5.0T Cranial Magnetic Resonance Diffusion-Weighted Imaging
10.3969/j.issn.1005-5185.2025.07.003
- VernacularTitle:单激发平面回波成像与多激发平面回波成像序列在5.0T颅脑磁共振扩散加权成像中的应用
- Author:
Hao CHEN
1
;
Dawei YIN
;
Shuya YUAN
;
Xiaopeng SONG
;
Runyu TANG
;
Ying LIU
Author Information
1. 中国科学技术大学附属第一医院影像科,安徽 合肥 230001
- Publication Type:Journal Article
- Keywords:
Brain diseases;
Magnetic resonance imaging;
Ultra-high field;
Diffusion-weighted imaging;
Echo-planar imaging;
Apparent diffusion coefficient;
Diagnosis
- From:
Chinese Journal of Medical Imaging
2025;33(7):700-705
- CountryChina
- Language:Chinese
-
Abstract:
Purpose To provide technical support for the use of echo-planar imaging(EPI)in the diagnosis of brain diseases,the image quality and diagnostic effect of single-shot echo-planar imaging(ssEPI)diffusion-weighted imaging(DWI)and multi-shot echo-planar imaging(msEPI)DWI sequences in the detection of brain diseases at 5.0T MR are analyzed.Materials and Methods A retrospective analysis was conducted on 42 patients with intracranial diseases who underwent T2-FLAIR,ssEPI DWI and msEPI DWI scans on a 5.0T MR system in the First Affiliated Hospital of USTC from August to September 2023.Two radiologists independently assessed image quality,measured distortion displacement,and compared signal-to-noise ratio,lesion-to-normal tissue contrast,contrast-to-noise ratio and apparent diffusion coefficient.Results msEPI sequence demonstrated significantly superior subjective scores,including geometric distortion,susceptibility artifacts,edge sharpness and overall image quality compared with those of ssEPI sequence(Z=5.728,4.197,5.766,5.777,all P<0.001).Quantitative analysis revealed substantial reduction in distortion displacement in msEPI sequence,including frontal lobe[(5.91±1.41)mm vs.(15.63±2.21)mm,t=34.050,P<0.001],anterior temporal lobe[(4.17±0.78)mm vs.(7.18±1.87)mm,t=12.263,P<0.001],posterior temporal lobe[(4.76±1.36)mm vs.(8.38±2.01)mm,t=21.336,P<0.001],cerebral diameter[(4.37±1.65)mm vs.(12.74±2.84)mm,t=23.255,P<0.001]and brainstem diameter[(0.80±0.63)mm vs.(1.98±1.63)mm,t=7.092,P<0.001],compared with ssEPI sequence.However,no statistically significant differences were observed in signal-to-noise ratio or contrast-to-noise ratio between the two sequences(P=0.848,0.638).Notably,msEPI sequences exhibited significantly enhanced lesion-normal tissue contrast compared with ssEPI sequences[221(131,311)vs.150(90,240),Z=3.89,P<0.001].Conclusion At 5.0T MRI,msEPI demonstrated superior image quality and diagnostic performance for craniocerebral diseases compared to ssEPI DWI sequences.
