Ct Anatomy For Radiotherapy -

Sparing the parotid glands to prevent xerostomia (chronic dry mouth). 🫁 Thorax Key OARs: Lungs, heart, esophagus, and spinal cord. Anatomical Landmarks: Carina, aortic arch, and diaphragm.

Requires precise contouring to avoid treatment-induced toxicities. 🗺️ Site-Specific CT Anatomy 🧠 Central Nervous System (Brain & Spine)

Liver, kidneys, stomach, bowel loops, bladder, and rectum.

Femoral heads, iliac crests, and symphysis pubis.

Co-registering CT with MRI (superior soft tissue contrast) or PET (functional/metabolic data) to better define GTVs. ⚠️ Challenges in CT Contouring