External Beam RT for Prostate Cancer - ASTRO
External Beam RT for Prostate Cancer - ASTRO
External Beam RT for Prostate Cancer - ASTRO
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
VMAT <strong>for</strong> prostate<br />
• Similar to IM<strong>RT</strong> <strong>for</strong> inverse planning<br />
• 2 arcs (clockwise then counter)<br />
• Gantry angles 210-150 °, 150-210 °<br />
– May y extend to 182-178 °, , 178-182 ° <strong>for</strong> LN cases<br />
• 6MV<br />
• Avoid 0° 0 collimators to reduce “tongue tongue & groove effect effect” of<br />
MLC<br />
– Usually 10-45° but rotated in opposite directions <strong>for</strong> 2 nd arc (e.g. 15 vs. 335 °)<br />
• Avoid couch kicks unless absolutely needed<br />
• Typically start w/ 10x10 cm field<br />
• WWatch t h ttotal t l MU’ MU’s (96% mean
Change language