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Dosimetry for IMRT

Dosimetry for IMRT

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Dose<br />

Computed<br />

Dose Accuracy and Distance to<br />

Agreement<br />

Dose accuracy <strong>for</strong> low gradients<br />

� �<br />

� ( , ) � ( ) � ( ) /<br />

r r Dr Dr D m c m c 50%<br />

Measured<br />

rr ( , r)�r � r<br />

m c m c<br />

Low gradients < 20%/cm<br />

Distance to agreement<br />

<strong>for</strong> high gradients<br />

Radius

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