Pituitary
Model: Brain_Cornea
Model Information
Metrics
Dice Coefficient
Delineation Information
Guidelines
Taken from Eekers DBP, Di Perri D, Roelofs E, Postma A, Dijkstra J, Ajithkumar T, et al. Update of the EPTN atlas for CT- and MR-based contouring in Neuro-Oncology. Radiother Oncol 2021;160:259–65. https://doi.org/10.1016/j.radonc.2021.05.013.
Method
Manual. The pituitary gland cannot be easily identified on axial CT, although the bony margins of the fossa are well shown. It is oval-shaped (craniocaudally up to 12 mm) and lies in the sella turcica. Laterally, the pituitary gland is bordered by the cavernous sinuses, which are well visible with intravenous contrast agent, it is just inferior to the brain, and is connected to the hypothalamus by its pituitary stalk. The borders of the pituitary gland can be defined best in the sagittal view. Alternatively, the inner part of the sella turcica can be used as a surrogate anatomical bony structure best identified using bone 1500/950 or soft tissue 350/50 WL/WW on CT.
Structure Boundaries
Cranial Boundary
Brain
Caudal Boundary
Sella turcica
Medial Boundary
Pituitary gland
Lateral Boundary
Sella turcica and the cavernous sinus
Ventral Boundary
Sella turcica
Dorsal Boundary
Sella turcica