Related Experiment Videos
MR imaging of the mesencephalic tectum: normal and pathologic variations
AJNR. American Journal of Neuroradiology
|January 1, 1987
Summary
Measurements of the quadrigeminal plate (mesencephalic tectum) on MRI can reveal abnormalities. Abnormal tectum thickness may indicate neoplastic disease or other conditions, aiding in diagnosis.
Area of Science:
- Neuroimaging
- Radiology
- Anatomy
Background:
- The quadrigeminal plate, or mesencephalic tectum, is a crucial brain structure.
- Variations in its dimensions can be indicative of underlying pathologies.
Purpose of the Study:
- To establish normative measurements of the quadrigeminal plate on midline sagittal MRI.
- To correlate variations in tectum dimensions with clinical findings.
Main Methods:
- Midline sagittal MRI scans of 93 healthy patients and 10 with aqueductal issues were analyzed.
- Thickness of superior and inferior colliculi and tectum length were measured.
- Standard spin-echo pulse sequences on a 0.5 T system were used.
Main Results:
- Average superior and inferior colliculi thickness was approximately 5 mm (range 2-7 mm).
- Abnormally thin colliculi showed no clear clinical significance.
- Abnormal thickness was associated with neoplastic disease, sarcoidosis, and mesencephalic beaking.
Conclusions:
- Midline sagittal MRI measurements of the quadrigeminal plate are valuable for detecting abnormalities.
- Tectum measurements can aid in identifying small infiltrative lesions, especially when transaxial images are ambiguous.