Helical tomotherapy dynamic quality assurance

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...

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Bibliographic Details
Published in:Medical physics (Lancaster) 2006-10, Vol.33 (10), p.3939-3950
Main Authors: Balog, John, Holmes, Tim, Vaden, Richard
Format: Article
Language:English
Subjects:
ACCURACY
BEAMS
Computed radiography
Computed tomography
computerised tomography
COMPUTERIZED TOMOGRAPHY
Dosimetry
ELECTROMETERS
Humans
Image quality
IONIZATION CHAMBERS
Laser fusion
Lasers
Medical image quality
Medical imaging
Particle beam detectors
PHANTOMS
Phantoms, Imaging
QUALITY ASSURANCE
Quality assurance equipment
Quality assurance in radiotherapy
Quality Control
radiation therapy
RADIOLOGY AND NUCLEAR MEDICINE
Radiometry - methods
RADIOTHERAPY
Radiotherapy Planning, Computer-Assisted - methods
Radiotherapy, Intensity-Modulated - methods
Reproducibility of Results
Rotation measurement
SENSITIVITY
Sensitivity and Specificity
Software
Time Factors
Tomography, Spiral Computed - methods
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Description
Summary: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.
ISSN:0094-2405
2473-4209
DOI:10.1118/1.2351952