2017_IGRT course book

ITV • Straightforward (?) • Physician time (contouring)

MidVentilation • Counterintuitive (?) • Physicist time (choice of phase + margin calculation)

• Smaller lung volume irradiated

• Coverage is ensured • Larger volumes of lung irradiated if large motion

• Requires special software?

• Needs an elaborate 4D viewer?

Do not delay the introduction/routine use of 4D-CT because of this issue!