January 29, 2009 - CIVCO Medical Solutions said they have become the exclusive distributor of Dosimetry Check IGQA, a portal imager-based 3D absolute patient dosimetry system.

Dosimetry Check works with any integrating EPID and any treatment planning system to provide a volumetric measurement for IMRT QA. This reportedly includes IMAT delivery techniques such as RapidArc or VMAT.

Unlike other systems, which use single plane QA analysis, Dosimetry Check uses the patient CT data set as a phantom. This is done by converting each beam’s 2D image information to a measured calibrated fluence, which is then projected onto the patient’s CT data set. In this way, the delivered dose is reconstructed with the same CT data set as the original treatment plan, thus allowing for planned and measured dose comparison. Plan comparison includes isodose overlays, dose profiles, point doses, dose differentials, 3D surface doses, 3D gamma analysis, Gamma Volume Histogram (GVH) analysis, and Comparative Volume Histograms (CDVH) analysis.

For more information: www.civco.com

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