Target Volume Determination 2015

What are OARs?

OAR

PRV

Imaging Delineation method

Spinal cord itself Brainstem itself

Yes Yes No No Yes No No No No No No

CT

Manual/autosegmentation

CT/MR Manual/autosegmentation CT/MR Manual/autosegmentation

Parotid/submandibular glands

Mandible

CT

Manual/autosegmentation

Retina, optic nerve, optic chiasm

CT/MR Manual CT/MR Manual

Lacrimal glands

Brain/brain structures Swallowing structures

CT/MR Manual/autosegmentation

CT CT

Manual Manual

Thyroid gland

Oral cavity

CT/MR Manual

Middle/inner ear

CT CT

Manual Manual

Temporomandibular joint, masseter & pterygoid muscles

No

Brachial plexus Cranial nerves Lungs & trachea Carotid arteries

Yes? Yes?

CT/MR Manual CT/MR Manual

No No

CT CT

Manual/autosegmentation Manual/autosegmentation

PRV = Planning organ-at-Risk Volume