Thalamus_L

Lateralized Structure LEFT

0.510 Avg Dice

— Median Dice

— Avg HD95 (mm)

— Avg MDC (mm)

Delineation Information

Modality: MR
Guideline: 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. Each thalamus should be contoured separately. Co-registration with T1-weighted MRI is required for delineation. The thalami are egg-shaped grey-matter masses, about 4 cm long, which can be asymmetrical. Medially, they are bounded by the third ventricle, through which they are frequently connected (interthalamic adhe- sion). Laterally, they are bounded by the posterior limb of the internal capsule. The anterior border of the thalamus eaches the level of the interventricular foramen, while the posterior border abuts the atrium of the lateral ventricle. Superiorly, each thalamus forms part of the floor of the lateral ventricle. Inferiorly, the tha- lami are limited by the hypothalamus anteriorly and by the mid- brain posteriorly.