GTV, CTV, PTV and DVH explained

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The document discusses various concepts and terms used in radiotherapy planning and reporting, including gross tumor volume (GTV), clinical target volume (CTV), internal target volume (ITV), planning target volume (PTV), treated volume, irradiated volume, organs at risk (OR), functional subunits, planning organ at risk volume (PRV), dose-volume histograms (DVH), and dose statistics like V20. It provides definitions and examples of how these terms are used to describe volumes, doses, and dose distributions in radiotherapy planning and reporting.

Gesundheit & Medizin Weiterbildung und Persönlichkeitsentwicklung Bildung

The Alphabet Soup of Radiotherapy GTV, CTV, PTV and all that…

In a perfect world… ,[object Object],[object Object]

In our world… ,[object Object],[object Object],[object Object]

The problem ,[object Object],[object Object],[object Object]

A solution ,[object Object],[object Object],[object Object]

References ,[object Object],[object Object],[object Object]

ICRU recommendations for describing volumes and doses

Gross Tumor Volume (GTV) ,[object Object],[object Object],[object Object],[object Object]

Clinical Target Volume (CTV) ,[object Object],[object Object],[object Object],[object Object]

Internal Target Volume (ITV) ,[object Object],[object Object]

Set-up Margin (SM) ,[object Object],[object Object]

Sources of set-up uncertainty ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Planning Target Volume (PTV) ,[object Object],[object Object],[object Object]

Treated Volume ,[object Object],[object Object],[object Object],[object Object]

Irradiated Volume ,[object Object],[object Object]

Organs at Risk (OR) ,[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object]

Planning Organ at Risk Volume (PRV) ,[object Object],[object Object],[object Object],[object Object]

Scenario A ,[object Object],[object Object],[object Object],[object Object],[object Object]

Scenario B ,[object Object],[object Object],[object Object]

Scenario C ,[object Object],[object Object],[object Object]

Dose statistics ,[object Object],[object Object]

Dose-Volume Histogram (DVH) ,[object Object],[object Object]

V 20 and such ,[object Object],[object Object]

Calculation of V 20 ,[object Object],[object Object]

Okay, so what is V95?? ,[object Object],[object Object]

And the moral of the story is…? ,[object Object],[object Object],[object Object]

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