4-Dimensional Treatment Planning of Lung Tumors
Lung Cancer
• 1 out of 14 people will be diagnosed with lung cancer at some point in their life!
• 90% of lung cancer is caused by SMOKING.
WIP Brown Bag March 3, 2009Chen, Mori, Sharp
More distal lung is irradiated
1
Accumulated doseDeformed doseOriginal
Room view Organ view Voxel view
Observations
• With post field, there is range perturbation distal to target during motion
• More normal lung is irradiated • Distal lung density is altered; so deeper
geometric penetration. • Therefore EUD could change in 4D planning vs
3D planning. Magnitude depend on degree of motion and compensator design.