Topics:
Radiation Oncology • Neuro-Oncology
In what situations do you utilize motion management of the optic structures?
What techniques do you employ for motion management?
Answer from: Radiation Oncologist at Academic Institution
A paper published in Br J Radiol. 2019 (Xiang et al., PMID 31067077) showed, based on MRI, an average physiological motion of the optic chiasm to be 0.5-0.75mm. We have used at least 1mm expansion of the optic nerves and chiasm in our stereotactic radiosurgery treatment planning.
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Answer from: Radiation Oncologist at Community Practice
It is also important to pay attention to direction of gaze during treatment/intra-fractionally. The optic nerves move considerably with medial and lateral gaze. See the below video. It may give you palpitations!
https://twitter.com/i/status/1230190646683734017
Comments
Radiation Oncologist at Banner MD Anderson Cancer Center
That is a really illuminating (frightening) video!...
That is a really illuminating (frightening) video!...
Radiation Oncologist at Banner M.D. Anderson Cancer Center
Great point. Depending on the anatomy, I have aske...
Great point. Depending on the anatomy, I have aske...