Tomotherapy as a tool in image-guided radiation therapy (IGRT): theoretical and technological aspects.
AuthorYartsev, S; Kron, T; Van Dyk, J
Source TitleBiomedical Imaging and Intervention Journal: a multidisciplinary open access online journal
PublisherDepartment of Biomedical Imaging, University of Malaya, Malaysia
University of Melbourne Author/sKron, Tomas
AffiliationSir Peter MacCallum Department of Oncology
Document TypeJournal Article
CitationsYartsev, S., Kron, T. & Van Dyk, J. (2007). Tomotherapy as a tool in image-guided radiation therapy (IGRT): theoretical and technological aspects.. Biomed Imaging Interv J, 3 (1), pp.e16-. https://doi.org/10.2349/biij.3.1.e16.
Access StatusOpen Access
Open Access at PMChttp://www.ncbi.nlm.nih.gov/pmc/articles/PMC3097641
Helical tomotherapy (HT) is a novel treatment approach that combines Intensity-Modulate Radiation Therapy (IMRT) delivery with in-built image guidance using megavoltage (MV) CT scanning. The technique utilises a 6 MV linear accelerator mounted on a CT type ring gantry. The beam is collimated to a fan beam, which is intensity modulated using a binary multileaf collimator (MLC). As the patient advances slowly through the ring gantry, the linac rotates around the patient with a leaf-opening pattern optimised to deliver a highly conformal dose distribution to the target in the helical beam trajectory. The unit also allows the acquisition of MVCT images using the same radiation source detuned to reduce its effective energy to 3.5 MV, making the dose required for imaging less than 3 cGy. This paper discusses the major features of HT and describes the advantages and disadvantages of this approach in the context of the commercial Hi-ART system.
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