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- W3031609521 abstract "Objective To investigate the MRI anatomy of the optic chiasm and its adjacent structures in normal adults.Methods The study included 65 adults, 31 males and 34 females, 18 to 72 years, and averaging 42.3 years.All 65 patients were studied using T_1WI at axial, coronal, and sagittal sections and T_2WI at sagittal sections, 20 adults were also scanned with T_2WI at axial section, and 20 at coronal sections.The transverse diameter, the height, the anteroposterior diameter, chiasm-tuberculum distance, the angle between the optic chiasm and anteroposterior diameter of foramen magnum, and the angle between bilateral intracranial optic nerves were measured, respectively.The shape in the sections and its anatomic relationship were also investigated.Results (1) In axial sections, the transverse diameter was (13.0±1.7) mm and (13.5±1.7) mm in coronal sections.The height was (3.1±0.55) mm.The anteroposterior diameter was (8.6±0.93) mm.The chiasm-tuberculum distance was (3.1±1.7) mm.The angle between the optic chiasm and the anteroposterior diameter of the foramen magnum was (38.3±8.4)°.The angle between bilateral intracranial optic nerves was (65.6±8.5)°.All the results divided by sex did not yield any significant differences.(2) The adjacent structures: The third ventricle located superiorly, the internal carotid arteries were on each side, the anterior cerebral arteries passed anterosuperiorly, the gyrus rectus of frontal gyrus was in the front, the pituitary stalk, the tuber cinereum, and mammillary bodies located posteriorly, and the pituitary gland and sphenoidal sinus located inferiorly.Conclusion The shape and its anatomic relationship of the optic chiasm can be well shown on MR images, the size can be measured accurately with MRI." @default.
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- W3031609521 date "2004-02-10" @default.
- W3031609521 modified "2023-09-26" @default.
- W3031609521 title "MR imaging anatomy of the optic chiasm" @default.
- W3031609521 doi "https://doi.org/10.3760/j.issn:1005-1201.2004.02.012" @default.
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