الفهرس 
Normal Brain AnatomyOnly 14 pages are availabe for public view
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Abstract
Fetal MR imaging plays a complementary role to prenatal ultrasound in the evaluation of the fetuses with suspected abnormalities. MR imaging’s role includes confirming or excluding possible lesions, defining their full extent, aiding in their characterization, and demonstrating other associated abnormalities. As newer techniques such as diffusion imaging, MR spectroscopy, and functional studies are used more widely, it is hoped that additional information will be made available by this modality to physicians evaluating and taking care of fetuses. Magnetic resonance imaging has only recently been used to evaluate the developing fetus. Although ultrasonography(US) is the reference standard for routine imaging of the obstetric patient, there are times when US is not able to facilitate complete diagnosis. An understanding of human embryonic development is essential to interpret fetal images. This is particularly true in the fetal brain because development is complex. Since fetal MR imaging is a relatively new field, there are few resources to use as guidelines . US and MR imaging are complementary non invasive imaging methods in the evaluation of high-risk pregnancy. When a CNS anomaly is detected at US, MR imaging may demonstrate additional findings that may alter patient counseling and case management. The types of changes in case management that occur as a result of findings on prenatal MR images are dependent on gestational age .