Dosimetric verification

  • Since we have limited experience with IMRT and dynamic MLC, we continue to verify each plan using an ion chamber in a water-equivalent phantom.
  • The planning system is used to cast the patient’s IM beams into the phantom and predict the ion chamber dose for a single fraction.

For our patient, measurement and calculation agreed to within 2%.

Time = 60 min. when combined with fluence map verification