Right Occipital:

This patient had metastatic NSCLC, with single right occipital metastatic lesion. SRS was implemented with a single 18Gy fraction.  Six partial arcs were utilized to achieve the following limiting structure dosages..

• Optic nerves and optic chiasm max point dose less than 8Gy
• Brainstem max point dose less than 8Gy
• Volume of brain receiving greater than 4Gy should be less than 25cc
• Left Occipital cortex max point dose less than 15Gy, with < 1 cc receiving greater than 10Gy

 

---

18Gy plan

DVH Statistics