| Magnetic resonance imaging of the normal fetal oesophagus. | |
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MedLine Citation:
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PMID: 21425198 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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PURPOSE: To establish the magnetic resonance imaging (MRI) appearance of the normal fetal oesophagus and to supply metric data on its growth. MATERIAL AND METHODS: In 250 fetal MRI studies (20-39 gestational weeks) the visibility of the upper (O1: cervical to tracheal bifurcation) and lower oesophageal segment (O2: tracheal bifurcation to diaphragm) was assessed separately in three section planes and scored as being visible, whether fluid-filled or not. The maximum diameters were recorded and dynamic studies were analysed for the duration of fluid-filling. RESULTS: O1 was only visualized when fluid-filled and was visible in 16.8% (axial), 4% (frontal) and 22.5% (sagittal). O2 could also be detected in the solid state, and was seen in 96.4% (axial), 74% (frontal) and 39.6% (sagittal) of cases, being fluid-filled in 62.7-88.9%. Depending on the amount of fluid-filling O2 had a variable appearance. On dynamic scans O1 was seen fluid-filled for 0.5-1.5 seconds, O2 for 3-35 seconds. The frequency of visualization increased with gestational age, as did the diameters, showing a linear increase. CONCLUSION: Visualization of the fetal oesophagus with MRI depends on section plane, segment and gestational age, with significant differences between the two parts: While O1 requires fluid-filling related to fetal swallowing, the O2 portion usually can also be demonstrated independent of fluid-filling as a consequence of its topographical relationships. The frequent distended condition of O2 may reflect the immature nature of oesophageal neuromuscular activity, and the lack of an anti-reflux mechanism due to a short abdominal oesophagus. Copyright © 2011 ISUOG. Published by John Wiley & Sons, Ltd. |
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Authors:
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Peter C Brugger; Michael Weber; Daniela Prayer |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-3-21 |
Journal Detail:
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Title: Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology Volume: - ISSN: 1469-0705 ISO Abbreviation: - Publication Date: 2011 Mar |
Date Detail:
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Created Date: 2011-3-22 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9108340 Medline TA: Ultrasound Obstet Gynecol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 ISUOG. Published by John Wiley & Sons, Ltd. |
Affiliation:
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Integrative Morphology Group, Centre for Anatomy and Cell Biology, Medical University of Vienna, Vienna, Austria. peter.brugger@meduniwien.ac.at. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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