What step ensures the machine-delivery of a plan is correct before treatment?

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What step ensures the machine-delivery of a plan is correct before treatment?

Pre-treatment QA and machine-verification ensure the plan can be delivered exactly as written before the first fraction. By checking the plan’s monitor units, beam geometry, and MLC positions—and by validating the dose distribution with a QA measurement or phantom—the team catches discrepancies in dose calculations, machine calibration, or delivery parameters before any treatment occurs. Relying on postoperative checks or clinician verification alone can miss these issues, and verifying after treatment has begun risks delivering an incorrect dose to the patient in the first fraction. Therefore, performing machine-verification and plan QA prior to delivering the first fraction is the correct step.

Pre-treatment QA and machine-verification ensure the plan can be delivered exactly as written before the first fraction. By checking the plan’s monitor units, beam geometry, and MLC positions—and by validating the dose distribution with a QA measurement or phantom—the team catches discrepancies in dose calculations, machine calibration, or delivery parameters before any treatment occurs. Relying on postoperative checks or clinician verification alone can miss these issues, and verifying after treatment has begun risks delivering an incorrect dose to the patient in the first fraction. Therefore, performing machine-verification and plan QA prior to delivering the first fraction is the correct step.

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