Optic chiasm | Radiology Reference Article - Radiopaedia.org
2024年10月23日 · The optic chiasm or chiasma is the midline structure where the nasal (medial) fibers of the optic nerves decussate to continue posteriorly as the optic tracts. It lies in the chiasmatic cistern and along with the pituitary stalk, is completely encircled by the circle of Willis.
High-resolution MR scanning is reported to be helpful in evaluating the normal optic chiasm and nerves, but documentation of pathologic lesions is limited [6]. Our study was aimed at comparing MR with plain CT and metrizamide CT in the evaluation of lesions of …
Imaging of Optic Neuropathy and Chiasmal Syndromes
2017年3月13日 · When clinical presentations of optic neuropathy and chiasm disorders are nonspecific, imaging plays a critical role in detecting, localizing, and differentiating the wide variety of causes. Some key imaging features are characteristic, leading to appropriate treatment and preventing unnecessary tissue biopsies.
Imaging of the optic chiasm and retrochiasmal visual pathways
2013年10月1日 · The exploration of the chiasm and retrochiasmal visual pathways relies on magnetic resonance imaging. If a lesion of the optic chiasm is suspected, the millimetric acquisitions in T2 and T1 weighting with and without contrast infusion are …
This article describes the results of a study distance from optic chiasm to the tuberculum sellae as seen on sagittal MR images. Measurements revealed an
MRI of optic tract lesions: Review and correlation with visual field ...
2013年2月28日 · MRI images are correlated with perimetric findings in order to demonstrate localization of lesions in the visual pathway. This may serve as a valuable reference tool to clinicians and radiologists in the early diagnostic process of differentiating causes of various visual field defects in daily practice.
MRI of optic chiasm and optic pathways. | American Journal of ...
MRI of optic chiasm and optic pathways. Eight verified lesions of the optic chiasm were examined on 0.5 T magnetic resonance (MR) and GE 9800, 8800 computed tomographic (CT) scanners. Enlargement of the optic chiasm was demonstrated in all cases.
Anatomical Study of MRI Optic Chiasm at the Bamako Anatomy …
The medial sagittal section provides the best picture of changes in the size of the optic chiasm and intracranial portions of the optic nerves. The coronal sections allow the best appreciation of the optical chiasm ratios and the axial sections are optimal to appreciate the retro-chiasmatic optical pathways [6].
MRI of optic chiasm and optic pathways. - PMC - National …
Abnormal signal, probably signifying tumor spread into the optic radiation, was detected on T2-weighted images in one case. The resolution of MR scans is similar or superior to CT, and sagittal views are most useful in evaluating lesions in this location.
MRI of optic chiasm and optic pathways - PubMed
Abnormal signal, probably signifying tumor spread into the optic radiation, was detected on T2-weighted images in one case. The resolution of MR scans is similar or superior to CT, and sagittal views are most useful in evaluating lesions in this location.