采用运动抑制技术的扩散加权成像（DWI）进行采集和重建可提高鼻咽癌患者的图像质量：非回波平面DWI与单次激发回波平面DWI的比较
Acquisition and reconstruction with motion suppression DWI enhance image quality in nasopharyngeal carcinoma patients: Non-echo-planar DWI comparison with single-shot echo-planar DWI.
作者信息
Xu Guixiao, Liu Haibin, Ling Dingwei, Li Yu, Lu Nian, Li Xinyang, Zhang Yezhuo, He Haoqiang, Huang Zuhe, Xie Chuanmiao
机构信息
Department of Radiology, State Key Laboratory of Oncology in South China, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Guangdong Provincial Clinical Research Center for Cancer, Sun Yat-sen University Cancer Center, Guangzhou 510060, P.R. China.
Department of Radiology, State Key Laboratory of Oncology in South China, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Guangdong Provincial Clinical Research Center for Cancer, Sun Yat-sen University Cancer Center, Guangzhou 510060, P.R. China.
出版信息
Eur J Radiol. 2024 Dec;181:111752. doi: 10.1016/j.ejrad.2024.111752. Epub 2024 Sep 21.
PURPOSE
To evaluate the impact of application acquisition and reconstruction with motion suppression (ARMS) technology on improving the image quality of diffusion-weighted Imaging (DWI) for nasopharyngeal carcinoma (NPC), compared to single-shot echo-planar imaging (SS-EPI).
METHODS
A total of 90 patients with NPC underwent MR examination, including ARMS DWI and SS-EPI DWI sequences. Both DWI sequences were acquired with b-values 0 and 800 s/mm. Two radiologists evaluated the visibility of the lesion, geometric distortion, and overall image quality of the two DWI sequences. Signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), geometric distortion degree, and apparent diffusion coefficient (ADC) values of the nasopharyngeal lesions were assessed and compared for two sequences. The Wilcoxon signed-rank test was used to compare the quantitative and qualitative parameters of the two sequences.
RESULTS
The lesion visibility, geometric distortion, and overall image quality scores were significantly higher in ARMS DWI (all P<0.001). Four small-sized lesions were not visible and four lesions were partially visible in the SS-EPI DWI sequence. Lesion detection rate of ARMS DWI is 100 %, while that of SS-EPI is 95.56 %, P<0.043. The mismatch distance between the fusion images of ARMS DWI and T2WI was smaller than that of SS-EPI DWI and T2WI (all P<0.001). The SNR and CNR of ARMS DWI were lower than that of SS-EPI DWI (114.48 ± 37.89 vs. 202.61 ± 78.84, P<0.001 and 1.81 ± 1.84 vs. 3.29 ± 3.71, P<0.003) while the ADC value was higher (839.19 ± 138.44 × 10 mm/s vs. 788.82 ± 110.96 × 10 mm/s, P<0.002).
CONCLUSION
ARMS DWI improves the image quality by reducing geometric distortion and magnetic susceptibility artifacts. ARMS DWI is superior to SS-EPI DWI for diagnosing small-sized nasopharyngeal lesions, although it has lower SNR and CNR.
目的
与单次激发回波平面成像（SS-EPI）相比，评估应用运动抑制采集与重建（ARMS）技术对提高鼻咽癌（NPC）扩散加权成像（DWI）图像质量的影响。
方法
90例NPC患者接受MR检查，包括ARMS DWI和SS-EPI DWI序列。两个DWI序列均采用b值0和800 s/mm进行采集。两名放射科医生评估两个DWI序列的病变可视性、几何变形和整体图像质量。评估并比较两个序列的鼻咽癌病变的信噪比（SNR）、对比噪声比（CNR）、几何变形程度和表观扩散系数（ADC）值。采用Wilcoxon符号秩检验比较两个序列的定量和定性参数。
结果
ARMS DWI的病变可视性、几何变形和整体图像质量评分显著更高（均P<0.001）。在SS-EPI DWI序列中，4个小尺寸病变不可见，4个病变部分可见。ARMS DWI的病变检出率为100%，而SS-EPI为95.56%，P<0.043。ARMS DWI与T2WI融合图像之间的错配距离小于SS-EPI DWI与T2WI融合图像之间的错配距离（均P<0.001）。ARMS DWI的SNR和CNR低于SS-EPI DWI（114.48±37.89 vs. 202.61±78.84，P<0.001；1.81±1.84 vs. 3.29±3.71，P<0.003），而ADC值更高（839.19±138.44×10⁻⁶mm²/s vs. 788.82±110.96×10⁻⁶mm²/s，P<0.002）。
结论
ARMS DWI通过减少几何变形和磁敏感伪影提高图像质量。ARMS DWI在诊断小尺寸鼻咽癌病变方面优于SS-EPI DWI，尽管其SNR和CNR较低。
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