Performance of the Vidar Dosimetry Pro Advantage

The Vidar use with r designed t work in th compared reported f resolution scattering artifact of eliminated the Red L the availa scanner y linear acc INTERNATIONAL SPECIALTY PRODUCTS 1361 Alps Road Wayne NJ 07470∙ Tel: 973-628-4000 rmance of the Vidar Red LED Dosimetry Pro AdvantageTM: r optimized for use with GAFCHROMIC EBT Dosimetry Film. avid F. Lewis, Ph.D., Senior Director, Advanced Materials Group, nternational Specialty Products, Wayne, NJ ([email protected]) ® Red LED Dosimetry Pro AdvantageTM scanner is a new digitizer designed for adiochromic film. The Red LED light source in the scanner is specifically o deliver optimum response with GAFCHROMIC EBT dosimetry film. This is report evaluates the improvements provided by the Red LED scanner as to the earlier Vidar VXR-16 scanner. Measurement and evaluation are or the improved sensitometric response, the noise characteristics and the dose provided by the red LED light source. In addition, the effects of light have been significantly reduced in the Red LED scanner and a banding ten seen in digitized images of EBT in the VXR-16 scanner have been . Results show that EBT film is preferably scanned in landscape orientation on ED scanner. Optimal results are provided by digitizing the film at the center of ble scan area. Used in this manner, it is shown that EBT film and the Red LED ield high quality results in measuring the flatness of open exposure fields in a elerator and in evaluating dosimetry for patient IMRT treatment plans. A BUSINESS UNIT OF ISP 1.0 Introduction ilm dosimetry is frequently used as a means for measuring 2-dimensional distributions