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Dosimetry for IMRT

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Dynamic Multileaf Collimator<br />

MLC<br />

(DMLC) Delivery System<br />

Tolerance Action<br />

Li Limit it LLevell Leaf position accuracy<br />

05 0.5 mm 1 mm<br />

Leaf position reproducibility 0.2 mm 0.5 mm<br />

Gap width reproducibility<br />

0.2 mm 0.5 mm<br />

Leaf speed �0.1 mm/s �0.2 mm/s<br />

Gantry, MLC, and Table<br />

Isocenter<br />

0.75 mm 1.00 mm<br />

Isocenter radius radius<br />

Beam Stability<br />

Low MU Output p ( (

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