To effectively treat a vertex field, what adjustment may be necessary for the couch?

When treating a vertex field, adjusting the couch is crucial for ensuring that the radiation hits the target area accurately and safely. Turning the couch 90 degrees while rotating the gantry allows the radiation beam to be delivered from the correct angle, which is essential in vertex treatments targeting brain structures.

This approach optimizes beam geometry and distribution, minimizing exposure to surrounding healthy tissues while ensuring that the prescribed dose adequately reaches the tumor. The gantry rotation complements the couch adjustment, aligning the treatment area with the radiation field effectively.

Using this method helps in managing the setup and alignment challenges often encountered in vertex treatments, ultimately leading to a more precise and effective treatment plan.