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WE‐C‐BRA‐03: Acceptance Testing and Commissioning of a Commercial 3D Surface Matching Video System
Author(s) -
AlHallaq HA
Publication year - 2011
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.3613318
Subject(s) - isocenter , quality assurance , image guided radiation therapy , medical physics , imaging phantom , radiation treatment planning , acceptance testing , medical imaging , project commissioning , radiosurgery , radiation therapy , computer science , medicine , artificial intelligence , nuclear medicine , radiology , external quality assessment , software engineering , pathology , publishing , political science , law
Non‐invasive 3D surface matching systems have become commercially available forinitial patient positioning and real‐time monitoring during radiotherapy treatment. Some systems are capable of providing surface motion surrogates that can be used for respiratory gating. All systems must undergo commissioning and acceptance prior to clinical use. First, clinical implementation of these systems requires the establishment of routine quality control proceduresthat range from phantom studies to monitoring clinical setups.In particular, the congruence of the surface imaging isocentermust be compared to both the imaging and treatment radiation isocenters. Isocenter congruence accuracy limitations may need to be tailored to the treatment site. For example, tighter accuracy is expected of isocenter congruence for treatment monitoring ofstereotactic radiosurgery patients compared to monitoring of breast patients due to the smaller planning target volume margins. For clinical commissioning studies, the correlation of 3D surface matching compared to the routinely‐used image‐guided procedures should be well characterized. Furthermore, understanding the accuracy, robustness, and limitations of the algorithms used to register two 3D surfaces is key to understanding the expected clinical results. We will summarize our institutional experience with acceptance testing and commissioning the AlignRT (VisionRT Ltd., London, UK) 3D surface matching system and its clinical implementation for positioningpatients receiving whole breast radiotherapy. Learning Objectives: 1. List some acceptance testing procedures for surface imaging systems 2. Understand the commissioning process of surface imaging systems for whole breast radiotherapy 3. Understand how surface imagingisocenter congruence testing must be incorporated into ongoing quality assurance of image‐guided RT (IGRT)