Quantification of motion artifacts in 4DCT using global Fourier analysis Conference Paper
| Authors: | Wei, J.; Li, G. |
| Title: | Quantification of motion artifacts in 4DCT using global Fourier analysis |
| Conference Title: | 2012 IEEE Signal Processing in Medicine and Biology Symposium |
| Abstract: | Motion artifacts in 4-Dimensional computed tomography (4DCT) impose a potential problem in tumor and anatomy delineation, causing a systematic error in radiotherapy treatment planning. In patients, frequency and amplitude of motion artifacts appearing in 4DCT are currently manually evaluated by scrolling through all 4DCT images. This is a tedious, time consuming and error-prone process with an outcome that may be difficult for comparison among patients. In this study, we propose an automatic approach to evaluate the motion artifacts in 4DCT using Discrete Fourier transform. Instead of applying Fourier transform in local macro-blocks as done in ordinary signal processing and computer vision applications, we discover that 4DCTs of severe motion artifacts demonstrate special behavioral properties in their spectral domain after a global Fourier transform, which can be exploited to effectively quantify the severity of motion artifacts in 4DCT images via a band-passing analysis. This is the first effort in creating a computerized algorithm to evaluate the motion artifacts with a quantitative and objective evaluation with encouraging performances. Further study will be conducted with more patient data with more rigorous 4-dimensional analysis in the near future. © 2012 IEEE. |
| Keywords: | radiotherapy; patient monitoring; computerized tomography; signal processing; computed tomography; spectrum analysis; radiotherapy treatment planning; fourier transforms; fourier analysis; spectral analysis; hospital data processing; band-passing; data indexing; fourier transform; automatic approaches; behavioral properties; computer vision applications; error-prone process; objective evaluation; discrete fourier transforms; macros; signal reconstruction |
| Journal Title | Proceedings on 2012 IEEE Signal Processing in Medicine and Biology Symposium |
| Conference Dates: | 2012 Dec 1 |
| Conference Location: | New York, NY |
| ISBN: | 978-1-4673-5665-7 |
| Publisher: | IEEE |
| Location: | New York, NY |
| Date Published: | 2012-01-01 |
| Start Page: | 6469468 |
| Language: | English |
| PROVIDER: | scopus |
| DOI: | 10.1109/SPMB.2012.6469468 |
| DOI/URL: | |
| Notes: | ISSN: 2372-7241 -- 2012 IEEE Signal Processing in Medicine and Biology Symposium, SPMB 2012 - IEEE Signal Process. Med. Biol. Symp., SPMB - "Conference code: 96232" - "Export Date: 1 May 2013" - ":doi 10.1109/SPMB.2012.6469468" - "Sponsors: IEEE USA; The City College of New York (CCNY); Polytechnic Institute of New York University (NYU-Poly)" - 1 December 2012 through 1 December 2012 - "Source: Scopus" |
