DocumentCode :
1819401
Title :
Compensation of breathing motion artifacts in thoracic PET images by wavelet-based deconvolution
Author :
El Naqa, Issam ; Low, Daniel A. ; Bradley, Jeffrey D. ; Vicic, Milos ; Deasy, Joseph O.
Author_Institution :
Dept. of Radiat. Oncology, Washington Univ., St. Louis, MO
fYear :
2006
fDate :
6-9 April 2006
Firstpage :
980
Lastpage :
983
Abstract :
In biological imaging of thoracic tumors using FDG-PET, blurring due to breathing motion often significantly degrades the quality of the observed image, which then obscures the tumor boundary. The effect could be detrimental in small lesions. We demonstrate a deconvolution technique that combines patient-specific motion estimates of tissue trajectories with wavelet decomposition to compensate for breathing-motion induced artifacts. The lung motion estimates were obtained using a breathing model that maps spatial trajectories in CT data as a function of tidal volume and airflow measured by spirometry. Initial results showed good improvement in the spatial resolution, especially in the direction of major lung motion (craniocaudal) on phantom data as well as on clinical data with large or small tumors
Keywords :
deconvolution; lung; medical image processing; motion compensation; phantoms; pneumodynamics; positron emission tomography; tumours; wavelet transforms; CT data; FDG-PET; airflow; breathing motion artifact compensation; lung motion estimates; major lung motion; patient-specific motion estimates; phantom; spatial resolution; spirometry; thoracic PET images; thoracic tumors; wavelet decomposition; wavelet-based deconvolution; Computed tomography; Deconvolution; Degradation; Lesions; Lungs; Motion estimation; Motion measurement; Neoplasms; Positron emission tomography; Trajectory;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Biomedical Imaging: Nano to Macro, 2006. 3rd IEEE International Symposium on
Conference_Location :
Arlington, VA
Print_ISBN :
0-7803-9576-X
Type :
conf
DOI :
10.1109/ISBI.2006.1625084
Filename :
1625084
Link To Document :
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