Conclusion: The patient positioning using 2D/2D kV and Gold Anchors increases the setup precision and enables to reduce margins. Because the prostate motion during the course of radiotherapy can be significant, margins for the PTV should include the intrafraction prostate mobility. Poster at ESTRO 2010, poster #1674
Tag Archives: Varian
Purpose: Triggered imaging is the use of kV image acquisition during treatment delivery to monitor intrafractional motion of implanted fiducials. An automatically identified fiducial point on the kV image is compared to its expected position predetermined from the treatment planning CT, and the treatment can be paused if the difference exceeds a user-definable tolerance. Conclusion: Triggered […]
“Online Correction of Intrafraction Motion during Volumetric Modulated Arc Therapy for Prostate Radiotherapy: A Cohort Study Quantifying the Frequency of Shifts and Analysis of Men at Highest Risk” Methods (extract): 132 prostate cancer patients underwent planning CT and same day placement of 3 Gold Anchor markers. Triggered kV images were acquired every 10 seconds using […]
“Online correction of intrafraction motion during volumetric modulated arc therapy for prostate radiotherapy using fiducial-based kV imaging: A cohort study quantifying the frequency of shifts and analysis of men at highest risk” Background (extract): We sought to characterize setup corrections in our practice informed by the TrueBeam Advanced imaging package, and analyze factors associated with […]