An Assessment of PTV Margin Definitions for Patients Undergoing Conformal 3D External Beam Radiation Therapy for Prostate Cancer Based on an Analysis of 10,327 Pretreatment Daily Ultrasound Localizations

Phantom Measurements to Quantify the Accuracy of a Commercially Available Cone-Beam CT Gray-Value Matching Algorithm Using Multiple Fiducials

“…Our results suggest excellent accuracy of the studied 3-D/3-D gray-value matching algorithm when several fiducials are present, especially when comparing the residual error when a 3-mm PCT is used (0.4 mm) to the commonly applied safety margin of 8-13 mm [20,24].…”

Residual Translational and Rotational Errors after kV X-Ray Image-Guided Correction of Prostate Location Using Implanted Fiducials

“…Other methods to align the patient are based on ultrasound localizations [30], electronic portal imaging or Xray imaging of implanted markers [8,11] or megavoltage CT ± FMs [16,20,39]. The authors describe displacements in the same range as in [13], i.e., especially random errors up to 5 mm.…”

Hypofractionated radiation therapy for prostate cancer: The McGill University Health Center experience

“…There were no specifically defined normal tissue constraints for the organs at risk. Daily pretreatment localization of the prostate gland was performed initially using ultrasound (BAT system; Nomos Corporation, Sewickley, PA) [6].…”