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Characteristics of megavoltage cone‐beam digital tomosynthesis
Author(s) -
Descovich M.,
Morin O.,
Aubry J. F.,
Aubin M.,
Chen J.,
BaniHashemi A,
Pouliot J.
Publication year - 2008
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 - 10.1118/1.2868763
Subject(s) - tomosynthesis , image quality , cone beam computed tomography , iterative reconstruction , optics , distortion (music) , medical imaging , projection (relational algebra) , digital radiography , nuclear medicine , computer vision , medical physics , computer science , artificial intelligence , radiography , physics , mammography , computed tomography , medicine , image (mathematics) , radiology , amplifier , computer network , bandwidth (computing) , algorithm , cancer , breast cancer
This article reports on the image characteristics of megavoltage cone‐beam digital tomosynthesis (MVCB DT). MVCB DT is an in‐room imaging technique, which enables the reconstruction of several two‐dimensional slices from a set of projection images acquired over an arc of 20 ° − 40 ° . The limited angular range reduces the acquisition time and the dose delivered to the patient, but affects the image quality of the reconstructed tomograms. Image characteristics (slice thickness, shape distortion, and contrast‐to‐noise ratio) are studied as a function of the angular range. Potential clinical applications include patient setup and the development of breath holding techniques for gated imaging.