Lens_L
Category:
Eye
Description:
Lens Left
Model: Ocular_Structures
MR
Model Information
Metrics
Average Volume (cc)
0.3
Average
Dice Coefficient
0.56
Average
0.64 (Median)
95th Percentile Hausdorff Distance (mm)
2.64
Average
2.46 (Median)
Median Distance to Conformity (mm)
3.38
Average
2.52 (Median)
Undercontouring MDC (mm)
1.65
Average
1.62 (Median)
Overcontouring MDC (mm)
1.74
Average
1.24 (Median)
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 lens (diameter up to 10 mm) is a clearly visible biconvex avascular structure, located between the vitreous humor and the iris and can easily be delineated on CT
Structure Boundaries
Cranial Boundary
Where the lens is visible first.
Caudal Boundary
Inferior extent of the lens
Medial Boundary
Outer contour of the lens
Lateral Boundary
Outer contour of lens
Ventral Boundary
Outer contour of lens
Dorsal Boundary
Outer contour of lens