IMRT Verification Module

FDA 510(k) cleared in May of 2000, RadCalc's IMRT module allows the user to perform an independent MU or point calculation for Step and Shoot and Sliding Window IMRT treatment plans. The IMRT computation is performed utilizing a modified Clarkson scatter integration along with a Head Scatter algorithm to improve accuracy. The MLC leaf sequence patterns can be imported into RadCalc through various mechanisms. The computation is then completed using this information.

The algorithm utilized by RadCalc was published in the October 2000 issue of the Medical Physics Journal. "A monitor unit verification calculation in intensity modulated radiotherapy as a dosimetry quality assurance" J. H. Kung, G. T. Y. Chen, and F. K. Kuchnir pp. 2226-2230. This article details the computation algorithm utilized by RadCalc. Since publication of this article, the algorithm utilized has been updated to further improve accuracy.

IMRT Treatment Plan Support Benefits

 COMPLIMENT TO FILM AND ION CHAMBER DOSE VERIFICATION: May reduce QA time, labor, and machine downtime.

*Refers to film or ion chamber dose verification methods consisting of room setup, delivery, and dose confirmation.

MLC Display
Click on thumbnail to view larger image.

IMRT3 sm

RadCalc allows you to import from your treatment planning system and export to your verify and record system either static or dynamic MLC leaf sequences. RadCalc has been demonstrated to successfully transfer 120 leaf fields. The MLC leaf patterns are viewable within RadCalc's MLC Data tab as shown above.

IMRT Fluence Map
Click on thumbnail to view larger image.

IMRT1 sm

IMRT: Displays fluence map, dose per segment, average leaf pair opening, point dose comparison, and volume average dose comparison.

Volume Average Dose
Click on thumbnail to view larger image.

IMRT2 sm

IMRT: Displays volume average dose details and allows user to change the sampling radius.



MKT-009 Rev: B