AI in Radiation Therapy Planning Quiz

Answers and explanations appear as you take the quiz.

1. What does auto-contouring do in radiation therapy planning?
   • Delivers the radiation beam
   • Outlines tumors and organs at risk on CT or MRI scans
   • Schedules patient appointments
   • Calculates the patient's bill
2. Which contouring task is currently most mature for AI?
   • Organs at risk such as the spinal cord and parotid glands
   • Clinical target volumes after surgery
   • Deciding the radiation prescription
   • Choosing whether to treat at all
3. What does the planning target volume (PTV) add to the clinical target volume?
   • The patient's healthy organs
   • A second tumor
   • A margin for setup errors and motion
   • Nothing; they are the same
4. How does knowledge-based planning such as RapidPlan work?
   • It measures dose with a physical detector
   • It lets patients design their own plans
   • It removes the need for imaging
   • It learns from prior approved plans to predict achievable dose-volume histograms
5. Why is a high Dice score not enough to prove a contour is clinically acceptable?
   • Dice ignores where errors occur, and a small error near a critical organ can matter a lot
   • Dice only measures image brightness
   • Dice scores are always 100 percent
   • Dice measures dose, not shape
6. Why does adaptive radiotherapy benefit strongly from AI?
   • It removes the need for a linear accelerator
   • Re-contouring and re-planning while the patient waits must happen within minutes
   • It uses no imaging
   • It only treats skin cancers
7. Who approves contours and treatment plans before delivery?
   • The AI vendor
   • The hospital billing office
   • Radiation oncologists, with medical physicists checking plans and running QA
   • The patient alone
8. What should a clinic do when an auto-contouring vendor releases a model update?
   • Use it immediately without testing
   • Stop using AI permanently
   • Retrain it on one patient
   • Re-validate it on local data before clinical use