分段读出EPI与单次激发EPI在乳腺癌弥散加权成像中的对照研究

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摘要目的探讨分段读出平面回波成像（Rs-EPI）与单次激发平面回波成像（Ss-EPI）在弥散加权成像（DWI）中的图像质量差异。方法回顾性收集2018年4~8月于首都医科大学附属北京友谊医院行乳腺MR检查的乳腺癌患者36例。所有患者均同时行Rs-EPI-DWI和Ss-EPI-DWI两个序列扫描。由2名医师对图像病灶边缘锐利度（ESE）和几何变形程度（GDE）进行主观评价，并测量信噪比（SNR）、对比度、对比噪声比（CNR）、相对ADC值（rADC）等。结果 Rs-EPI-DWI序列的ESE、GDE、CNR、rADC与Ss-EPI-DWI序列比较，差异均有高度统计学意义（P < 0.01）。两序列的SNR和对比度差异无统计学意义（P > 0.05）。结论在乳腺癌检查中，Rs-EPI-DWI序列比Ss-EPI-DWI序列具有更高的图像质量。

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	关伟张艺邓立刚韩丹李静杨正汉王振常尹红霞

关键词 ：弥散加权成像, 乳腺癌, 磁共振成像, 图像质量, ADC, 信噪比, 对比噪声比

Abstract：Objective To investigate the image quality different of readout segmented echo planar imaging (Rs-EPI) and single-shot echo planar imaging (Ss-EPI) diffusion weighted imaging (DWI) in patients with breast cancer. Methods Thirty-six patients with breast cancer performed MR scan in Beijing Friendship Hospital, Capital Medical University from March to August 2018 were retrospectively enrolled in this study. In all patients, Rs-EPI-DWI and Ss-EPI-DWI were performed. Two independent readers visually assessed lesion edge sharpness evaluation (ESE) and geometric distortion evaluation (GDE). Differences between two sequences were compared quantitatively by measuring the signal-to-noise ratio (SNR), contrast, contrast-to-noise ratio (CNR), and relative apparent diffusion coefficient (rADC). Results ESE, GDE, CNR, and rADC values showed a significant difference between Rs-EPI-DWI and Ss-EPI-DWI (P < 0.01). There was no statistically significant difference in SNR and contrast values between the two sequences (P > 0.05). Conclusion In breast cancer, Rs-EPI-DWI provids significantly higher image quality than Ss-EPI-DWI.

Key words： Diffusion-weighed imaging Breast cancer Magnetic resonance imaging Image quality Apparent diffusion coefficient Signal to noise ratio Contrast to noise ratio

基金资助:北京学者（京人社专家发[2015]160）；
国家重点研发计划数字诊疗装备研发重点专项（2016YFC0106901）。

通讯作者: 尹红霞（1979.2-），女，硕士，工程师；研究方向：磁共振质量控制和成像新技术的应用。

引用本文:

关伟张艺邓立刚韩丹李静杨正汉王振常尹红霞. 分段读出EPI与单次激发EPI在乳腺癌弥散加权成像中的对照研究[J]. 中国医药导报, 2019, 16(19): 136-139.
GUAN Wei ZHANG Yi DENG Ligang HAN Dan LI Jing YANG Zhenghan WANG Zhenchang YIN Hongxia. Comparison of readout segmented EPI and single-shot EPI diffusion weighted imaging in patients with breast cancer. 中国医药导报, 2019, 16(19): 136-139.

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http://www.yiyaodaobao.com.cn/CN/ 或 http://www.yiyaodaobao.com.cn/CN/Y2019/V16/I19/136

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