Boris Johnson and Rishi Sunak visit Kent Oncology centre

The video tutorial introduces a new CT scanner and explains its clinical use since December. It describes the use of custom-made head shells to ensure patient safety during treatment. The process involves heating and molding the shells to fit the patient's head, which solidifies to maintain position. The tutorial also covers patient experiences and the use of green lasers for precise alignment, marking the treatment area's center, known as the ISIS center.

What are the benefits of using holes in the head shell as mentioned in the text?

Describe the role of the ISIS center in the treatment area.