A Quantitative Analysis of Four Dimensional Computed TomographyReport as inadecuate

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4DCT, CT, lung, motion management

Noice, Lori

Supervisor and department: Dr. Don Robinson

Examining committee member and department: Dr. Terence Riauka Dr. Sharon Morsink Dr. Ron Sloboda

Department: Physics


Date accepted: 2010-02-02T19:30:11Z

Graduation date: 2010-06

Degree: Master of Science

Degree level: Master's

Abstract: This project assesses the four dimensional computed tomography 4DCT capabilities of the Philips Brilliance Big Bore CT scanner Philips Medical Systems, Cleveland, OH. A mechanical phantom imparts clinically relevant motions to acrylic spheres of various diameters. The size, shape, and position of these spheres, as measured with 4DCT, are compared to their true size, shape, and position. An evaluation of image quality is also performed. Maximum discrepancies between physical and imaged volumes, for all sphere sizes and motion ranges, did not exceed 2.6 mm mean = 1.2 mm, standard deviation = 0.4 mm. For approximately tissue equivalent density objects, mean CT# in 4DCT images differed from those in standard clinical thoracic images by only a few Hounsfield units. Measured geometric precision along with the accuracy of mean CT#s observed in 4DCT phase images indicate that 4DCT is an appropriate imaging technique for treatment planning.

Language: English

DOI: doi:10.7939-R3MS3H

Rights: License granted by Lori Noice noice@ualberta.ca on 2010-01-30 GMT: Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of the above terms. The author reserves all other publication and other rights in association with the copyright in the thesis, and except as herein provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.

Author: Noice, Lori

Source: https://era.library.ualberta.ca/


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