Title: Motion correction of SPEC projection before reconstruction
Authors: Oghabian, M. A.
Mohammadi, F. I.
Sarkar, S.
Karimian, A. R.
Citation: WSCG '2004: Posters: The 12-th International Conference in Central Europe on Computer Graphics, Visualization and Computer Vision, 2.-6. February 2004, Plzen, p. 205-208.
Issue Date: 2004
Publisher: UNION Agency
Document type: konferenční příspěvek
URI: http://wscg.zcu.cz/wscg2004/Papers_2004_Poster/D53.pdf
ISBN: 80-903100-6-0
Keywords: počítačová tomografie;pohyb pacienta;korekce pohybu;korelační funkce
Keywords in different language: single photon emission computed tomography;patient motion;motion correction;correlation function
Abstract: In Single Photon Emission Computed Tomography (SPECT), the data acquisition occurs over a relatively long time, typically in the range of 5-30 minutes. During this period, the patient must lie still to guarantee the image quality. Nevertheless, patient movement has frequently been reported in clinical applications. This movement causes misalignment of the projection frames, which degrades the reconstructed image and may introduce artifacts. However, the ability to detect and correct for the motion using a computational method is valuable for quality assurance of SPECT imaging. In this work a correlation function based on Linogram and Sinogram of the projection is evaluated in order to estimate the occurred motion and correct it for the best alignment. By our implemented method the motion artifacts of our cases reduced considerably and our results showed that the misalignment (motion) between the projections could be found with a small error depending on the resolution of the images (pixel size), and the time and duration of the applied motion during the course of projection acquisition.
Rights: © UNION Agency
Appears in Collections:WSCG '2004: Posters

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