3. Radiation Treatment Treatment can include: •use of a multi-leaf collimator or the manu- facture of treatment devices to modify the treatment beam •dosimetry calculations (manual and computer) to determine dose distribution •port film verification of area being treated •clinical review by a radiation oncologist of the dosimetry plan •radiation physics quality control services: -chart calculation reviews -weekly machine calibrations -standardization of units -radioelement leak testing -radiation safety surveys Above: Linear Accelerator, the treatment machine Above: A Radiation Therapist is rotating the collimator of the accelerator for positioning of treament.	Above: Radiation Therapist making lead blocks Above: Multi-Leaf Collimator, a mask to limit radiation to the specific area being treated. Radiation Treatment (contd.) •clinic treatment management: -daily adminstration of radiation therapy usually five days per week -revision of treatment plan as necessary -continual assessment of the manner in which treatment is being delivered and the patient’s response to such treatment -direct examination of patient 4. Follow Up Follow-up visits or regular periodic examinations are carried out after the course of radiation therapy has been completed.