Cochlea_R

Category: Ear

Description: Right Cochlea

Model: Eye_Ventricle

Model Information

Metrics

Average Volume (cc)

0.08

Average

Dice Coefficient

0.43

Average

0.38 (Median)

95th Percentile Hausdorff Distance (mm)

4.04

Average

3.09 (Median)

Median Distance to Conformity (mm)

2.65

Average

3.05 (Median)

Undercontouring MDC (mm)

1.43

Average

1.38 (Median)

Overcontouring MDC (mm)

1.22

Average

1.07 (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 cochlea is a spiral structure (up to 0.6 cc) located in a bony cavity in the petrous portion of the temporal bone, caudal to the semicircular canals, lateral to the internal auditory canal. Using a WW/WL setting of 120/1500 on CT images, its volume can be defined as a small cavity.

Structure Boundaries

Caudal Boundary

Semicircular canals