Scanner‐based real‐time automated volumetry reporting of the fetus, amniotic fluid, placenta, and umbilical cord for fetal MRI at 0.55T

作者：Sara Neves Silva, Alena Uus, Hadi Waheed, Jassimran Bansal, Kamilah St Clair, Wendy V. Norman, Jordina Aviles Verdera, Daniel Cromb, Tomas Woodgate, Milou P.M. van Poppel, Johannes K. Steinweg, Jacqueline Matthew, Kuberan Pushparajah, David Lloyd, Vanessa Kyriakopoulou, Dimitrios Siassakos, Anna L. David, Joseph V. Hajnal, Lisa Story, Mary Rutherford, Jana Hutter · 发表于：Magnetic Resonance in Medicine · 年份：2025 · DOI：10.1002/mrm.70097 · 被引用次数：3 · 研究领域：Fetal and Pediatric Neurological Disorders、Neonatal and fetal brain pathology、Pregnancy and preeclampsia studies

PURPOSE: This work aims to enable real-time automated intra-uterine volumetric reporting and fetal weight estimation for fetal MRI, deployed directly on the scanner. METHODS: A multi-region segmentation nnUNet was trained on 146 images of 73 fetal subjects (coronal and axial orientations) for the parcellation of the fetal head, fetal body, placenta, amniotic fluid, and umbilical cord from whole uterus bSSFP stacks. A reporting tool was then developed to integrate the segmentation outputs into an automated report, providing volumetric measurements, fetal weight estimations, and z-score visualizations. The complete pipeline was subsequently deployed on a 0.55T MRI scanner, enabling real-time inference and fully automated reporting in the duration of the acquisition. RESULTS: 0.98) for the fetus, placenta, and amniotic fluid, and 0.91 for the umbilical cord. The prospective evaluation of the scanner deployment step was successfully performed on 50 cases, with the regional volumetric reports available directly on the scanner. CONCLUSIONS: This work demonstrated the feasibility of multi-regional intra-uterine segmentation, fetal weight estimation, and automated reporting in real-time. This study provides a robust baseline solution for the integration of fully automated scanner-based measurements into fetal MRI reports.