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Yelin Suh and Paul Keall Stanford University - GSI

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4D<br />

Planning Delivery<br />

4D CT<br />

Leaf Sequence for<br />

a 4D Treatment Plan<br />

L ( MU, θ )<br />

4D Plan<br />

Real-time 3D Target<br />

Position <strong>and</strong> Phase<br />

( x, y, z | θ )<br />

Deliver in Treatment Machine<br />

3D target position <strong>and</strong> respiratory phase information<br />

quantified from<br />

a 4D CT planning scan<br />

Discrepancy<br />

incoming from<br />

a position monitoring<br />

system in real time

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