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Helical tomotherapy dynamic quality assurance
Author(s) -
Balog John,
Holmes Tim,
Vaden Richard
Publication year - 2006
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 - 10.1118/1.2351952
Subject(s) - tomotherapy , quality assurance , electrometer , imaging phantom , medical physics , dosimetry , medical imaging , sensitivity (control systems) , computer science , optics , nuclear medicine , physics , medicine , engineering , radiation therapy , electronic engineering , radiology , artificial intelligence , external quality assessment , pathology
A multifaceted tomotherapy quality assurance procedure has been developed. This procedure tests most of the features inherent in the tomotherapy Hi‐Art device. This includes the megavoltage imaging quality, spatial and temporal accuracy of the dynamic delivery properties, as well as more traditional beam output characteristics. This is accomplished with a specialized multichannel electrometer that measures collected charge every 100 ms and a Virtual Water cylindrical phantom that holds many ion chambers and differing density insert plugs. Both devices are offered with the Hi‐Art product. These tests are presented as well as their sensitivity to beam and delivery variations.