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Radiology, Vol 154, 421-425, Copyright © 1985 by Radiological Society of North America

ARTICLES

Obstetrical magnetic resonance imaging: maternal anatomy

SM McCarthy, DD Stark, RA Filly, PW Callen, H Hricak and CB Higgins

Eleven patients whose pregnancies were at 34-36 weeks of gestational development underwent magnetic resonance (MR) imaging. Images of the maternal pelvis were assessed for anatomical changes of pregnancy in comparison with MR images of five non-pregnant volunteers. The relationship of the fetal presenting part to the internal os of the cervix was seen in all patients. Effacement of the cervix was identified when present. The maternal spine demonstrated disk abnormalities in nine patients. Changes in venous flow patterns were readily identified in all patients. The inferior vena cava was flattened or obliterated, a high signal was present in the iliac vessels (TE 56), and large collateral vessels were present.


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