What does PTV stand for in radiotherapy planning?

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Multiple Choice

What does PTV stand for in radiotherapy planning?

Explanation:
Planning Target Volume is the volume the radiotherapy plan aims to treat with the prescribed dose, created by expanding the Clinical Target Volume to account for uncertainties like patient movement, organ motion, and setup variations between treatment sessions. This margin ensures the intended dose covers the target consistently despite these changes. Primary Tumor Volume would refer to the gross visible tumor itself (GTV), not the expanded planning margin; Post-Treatment Volume and Partial Target Volume aren’t standard terms in this context.

Planning Target Volume is the volume the radiotherapy plan aims to treat with the prescribed dose, created by expanding the Clinical Target Volume to account for uncertainties like patient movement, organ motion, and setup variations between treatment sessions. This margin ensures the intended dose covers the target consistently despite these changes. Primary Tumor Volume would refer to the gross visible tumor itself (GTV), not the expanded planning margin; Post-Treatment Volume and Partial Target Volume aren’t standard terms in this context.

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