SPECT plays a crucial role in treatment planning for cancer patients. It helps in: 1. Targeting Radiation Therapy: By identifying the precise location of tumors, SPECT can help in targeting radiation therapy more accurately, sparing healthy tissues. 2. Surgical Planning: SPECT images can guide surgeons to remove tumors more effectively. 3. Monitoring Response: It helps in monitoring the response to chemotherapy or other treatments, allowing for adjustments if necessary.