EP-1621: Intrafraction errors in cranial radiotherapy with standard VMAT mask: implications for SRS/SRT

Institutional experience with SRS VMAT planning for multiple cranial metastases

BACKGROUND AND PURPOSE This study summarizes the cranial stereotactic radiosurgery (SRS) volumetric modulated arc therapy (VMAT) procedure at our institution. MATERIALS AND METHODS Volumetric modulated arc therapy plans were generated for 40 patients with 188 lesions (range 2-8, median 5) in Eclipse and treated on a TrueBeam STx. Limitations of the custom beam model outside the central 2.5 mm...

Real-Time Intrafraction Motion Management During Radiotherapy

Real-time intra-fraction target tracking is a technique that enables adjustment of the target radiation while it is being delivered (i.e., intra-fraction adjustments) to compensate for movement of the organ inside the body. Real-time tracking, which may or may not use radiographic images, is one of many techniques referred to as “image-guided radiotherapy” (IGRT). For this policy, realtime trac...

Real-Time Intrafraction Motion Management During Radiotherapy

Lessons learnt from errors in radiotherapy centers

Background: The purpose of this work is to discover and analyze errors and incidents in some radiotherapy centers, and to introduce methods that could reduce their occurrences, especially those which had happened due to the use of improper and inadequate equipment. This work is a first step toward clarifying the role of education in a risk-conscious culture, and changing the attitude of radioth...

Inter- and intrafraction uncertainty in prostate bed image-guided radiotherapy.

PURPOSE The goals of this study were to measure inter- and intrafraction setup error and prostate bed motion (PBM) in patients undergoing post-prostatectomy image-guided radiotherapy (IGRT) and to propose appropriate population-based three-dimensional clinical target volume to planning target volume (CTV-PTV) margins in both non-IGRT and IGRT scenarios. METHODS AND MATERIALS In this prospecti...