Simulated multileaf collimator tracking for stereotactic liver radiotherapy guided by kilovoltage intrafraction monitoring: Dosimetric gain and target overdose trends
نویسندگان
چکیده
منابع مشابه
Real-time target position estimation using stereoscopic kilovoltage/megavoltage imaging and external respiratory monitoring for dynamic multileaf collimator tracking.
PURPOSE To develop a real-time target position estimation method using stereoscopic kilovoltage (kV)/megavoltage (MV) imaging and external respiratory monitoring, and to investigate the performance of a dynamic multileaf collimator tracking system using this method. METHODS AND MATERIALS The real-time three-dimensional internal target position estimation was established by creating a time-var...
متن کاملDynamic multileaf collimator tracking of respiratory target motion based on a single kilovoltage imager during arc radiotherapy.
PURPOSE To demonstrate and characterize dynamic multileaf collimator (DMLC) tracking of respiratory moving targets that are spatially localized with a single kV X-ray imager during arc radiotherapy. METHODS AND MATERIALS During delivery of an arc field (358 degrees gantry rotation, 72-sec duration, circular field shape), the three-dimensional (3D) position of a fiducial marker in a phantom wa...
متن کاملComparison of multileaf collimator and conventional circular collimator systems in Cyberknife stereotactic radiotherapy
Multileaf collimator (MLC) technology has been newly introduced with the Cyberknife system. This study investigated the advantages of this system compared with the conventional circular collimator (CC) system. Dosimetric comparisons of MLC and CC plans were carried out. First, to investigate suitable target sizes for the MLC mode, MLC and CC plans were generated using computed tomography (CT) i...
متن کاملDosimetric performance of the new high‐definition multileaf collimator for intracranial stereotactic radiosurgery
The objective was to evaluate the performance of a high-definition multileaf collimator (MLC) of 2.5 mm leaf width (MLC2.5) and compare to standard 5 mm leaf width MLC (MLC5) for the treatment of intracranial lesions using dynamic conformal arcs (DCA) technique with a dedicated radiosurgery linear accelerator. Simulated cases of spherical targets were created to study solely the effect of targe...
متن کاملFirst demonstration of combined kV/MV image-guided real-time dynamic multileaf-collimator target tracking.
PURPOSE For intrafraction motion management, a real-time tracking system was developed by combining fiducial marker-based tracking via simultaneous kilovoltage (kV) and megavoltage (MV) imaging and a dynamic multileaf collimator (DMLC) beam-tracking system. METHODS AND MATERIALS The integrated tracking system employed a Varian Trilogy system equipped with kV/MV imaging systems and a Millenniu...
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ژورنال
عنوان ژورنال: Radiotherapy and Oncology
سال: 2020
ISSN: 0167-8140
DOI: 10.1016/j.radonc.2019.11.008