仰卧位屏气T1加权乳腺MRI的临床质量评估
在3T下对19例女性乳腺癌患者行仰卧位屏气3D T1加权Dixon梯度回波序列（LAVA）扫描，并与俯卧位图像对比。三位放射科医生评估图像质量，仰卧位与俯卧位均有97%的图像被评为可诊断。结论认为该序列是获取仰卧位诊断质量对比增强T1加权双侧乳腺图像的可行选择。
要点
- 仰卧位屏气T1加权乳腺MRI图像97%可诊断，与俯卧位相当。
- 需高并行成像因子（12×）才能覆盖双侧乳腺及腋窝淋巴结。
- 仰卧位可能提升患者舒适度并便于手术规划参考。
关键影像表现/征象
- 仰卧位LAVA图像质量足以判读，97%获得「诊断」评分，俯卧位图像同样为97%。
- 为达到足够的双侧乳腺及腋窝淋巴结联合覆盖，需要高并行成像因子（12×）。
诊断标准与关键数值
- 图像质量由三位放射科医生从覆盖范围、信噪比、锐利度及伪影存在情况方面进行评估，按读者进行比例分析。
临床应用与阅片要点
- 仰卧位屏气T1加权序列可用于需要仰卧位摆位的对比增强乳腺MRI检查，图像质量可满足诊断判读。
- 采用该序列时需注意使用高并行成像因子（12×）以保证双侧乳腺及腋窝淋巴结的覆盖。
以上解读依据论文摘要（全文未开放获取或许可不允许翻译转载）。
英文原文（摘要）· 点击展开
OBJECTIVE: Supine positioning for breast magnetic resonance imaging (MRI) may increase patient comfort, shorten exam times, improve co-registration with other modalities, and provide better guidance for surgical planning. The objective of this study was to assess the clinical quality of a breath-held T1-weighted sequence as a feasible approach for supine contrast-enhanced breast MRI.
METHODS: At 3T, in 19 supine-positioned female breast cancer patients, we acquired a 3D T1-weighted Dixon gradient recalled echo sequence (LAVA), within ≤19s breath-hold to reduce respiratory motion, using a high-density body-conforming coil. The same subjects also underwent prone-positioned 3D T1-weighted Dixon breast MRI. Image quality was assessed by three radiologists, specifically regarding coverage, signal-to-noise, sharpness, and presence of artifacts. Reader scores were analyzed per reader with a proportion analysis.
RESULTS: Supine LAVA images showed sufficient quality to be interpretable, with 97% 'diagnostic' scores, compared to also 97% for prone images. A high parallel imaging factor (12×) was necessary to achieve adequate combined bilateral breast and axillary lymph node coverage.
CONCLUSION: The proposed sequence presents a viable option to acquire diagnostic quality supine-positioned contrast-enhanced T1-weighted bilateral breast images.
引用
- Zimmermann J, Vincent J, Poplack SP, et al. Clinical quality of breath-held T1-weighted breast MRI in the supine position. Eur J Radiol. 2026. PMID: 42184602. doi:10.1016/j.ejrad.2026.112938
供执业医师工作参考，不替代临床判断；数值与分级以指南原文为准。