Glnd_Thyroid

Category: Gland
Description: Thyroid Gland

Model: LAD_Thyroid

CT

Model Information

Metrics

Average Volume (cc)

4.58
Average

Dice Coefficient

0.77
Average
0.84 (Median)

95th Percentile Hausdorff Distance (mm)

3.9
Average
2.1 (Median)

Median Distance to Conformity (mm)

6.06
Average
3.68 (Median)

Undercontouring MDC (mm)

3.8
Average
1.5 (Median)

Overcontouring MDC (mm)

2.27
Average
2.15 (Median)

Delineation Information

Guidelines

The guideline used is Brouwer CL, Steenbakkers RJHM, Bourhis J, Budach W, Grau C, Grégoire V, et al. CT-based delineation of organs at risk in the head and neck region: DAHANCA, EORTC, GORTEC, HKNPCSG, NCIC CTG, NCRI, NRG Oncology and TROG consensus guidelines. Radiother Oncol 2015;117:83– 90. https://doi.org/10.1016/j.radonc.2015.07.041. The gland is typically enhancing due to the high iodine content and has two lobes joined by a central isthmus

Method

Manual

Structure Boundaries

Cranial Boundary

Slice where the thyroid lobe becomes visible. Typically above the cricoid cartilage level

Caudal Boundary

Lowermost slice where the lobes are visible. Usually above the thoracic inlet.

Medial Boundary

Outer contour of the thyroid gland

Lateral Boundary

Outer contour of the thyroid gland

Ventral Boundary

Outer contour of the thyroid gland

Dorsal Boundary

Outer contour of the thyroid gland