What should you know about linear accelerator in radiotherapy?

Before treatment begins, scans are used to map the target and nearby organs. The team creates a plan that sets the beam direction, shape, and delivery pattern. During a visit, you lie on a treatment couch in the same position used for planning. The gantry may rotate around you while the beam is delivered; the therapists leave the room but watch and communicate with you.

The accelerator does not make a diagnosis and does not decide the dose on its own. Your radiation oncologist approves the plan, while physicists and therapists perform checks and help ensure that the planned treatment is delivered consistently.

Follow the preparation instructions for your body area and arrive with enough time for positioning. Tell the team about pain, difficulty lying flat, new medicines, pregnancy possibility, or implanted devices. Keep still during imaging and delivery; if you need help, use the agreed signal. Ask what skin care, activity, and symptom advice applies to your treatment area rather than relying on general tips.

Call the radiation unit if side effects interfere with drinking, eating, sleep, movement, or daily activities, or if you are unsure whether a symptom is expected. Seek urgent medical help for severe breathing difficulty, collapse, sudden confusion, or new weakness. A treatment team can assess symptoms and adjust supportive care when needed.

What area will be treated and how will it be positioned? What imaging will guide each visit? Which side effects should I report the same day? How will you check the plan before the first treatment?