Presentation
Healthy control subject.
Patient Data
Gender: Male
{"current_user":null,"step_through_annotations":true,"access":{"can_edit":false,"can_download":true,"can_toggle_annotations":true,"can_feature":false,"can_examine_pipeline_reports":false,"can_pin":false},"extraPropsURL":"/studies/35818/annotated_viewer_json?iframe=true\u0026lang=us"}
Normal study in the axial plane through the level midbrain demonstrating the cerebral aqueduct of Sylvius and the PAG.
From the case:
Periaqueductal gray matter
{"current_user":null,"step_through_annotations":true,"access":{"can_edit":false,"can_download":true,"can_toggle_annotations":true,"can_feature":false,"can_examine_pipeline_reports":false,"can_pin":false},"extraPropsURL":"/studies/35845/annotated_viewer_json?iframe=true\u0026lang=us"}
Normal study in the axial plane through the level midbrain demonstrating the cerebral aqueduct of Sylvius and the PAG:
- a = high T2 signal indicating the PAG
- b = flow void indicates the cerebral aqueduct of Sylvius
Case Discussion
T2WI demonstrates the periaqueductal gray (PAG) matter.