Abstract:

Objective 　To provide sagittal sectional anatomic data for guidance in  B- ultrasound and MRI diagnosis in abdominal and pelvic parts of pregnant women in the third trimester.　Method　After MRI scanning in abdominal and pelvic part of a pregnant woman cadaver in third trimester, the abdominal and pelvic parts was sectioned into serial sagittal 10-millimeter thick sections with equal intervals using a dynamoelectric beltsaw.　Result　The anatomic structures in sagittal sectional imaging and MRI in abdominal and pelvic parts of the cadaver with full term pregnance were well displayed，and the spatial relationship of the location of the placenta and fetal main organs to the materal vertebrae in sagittal sections of the specimen and the MR images was relatively constant.　Conclusion　The analytic results of the MR and serial sagittal sectional images of the cadaver can provide normal and useful anatomic  guidance for B- ultrasound and MRI diagnosis in abdominal and pelvic parts of  the pregnant women in the third trimester.

Key words: Fetus, Anatomy, Magnetic resonance imaging, Third pregnancy trimester