DocumentCode :
3548553
Title :
Analysis of time resolution in dynamic computed tomography for perfusion studies
Author :
Montes, Pau ; Lauritsch, Guenter
Author_Institution :
Interdisciplinary Center for Sci. Comput., Heidelberg Univ.
Volume :
7
fYear :
2004
fDate :
16-22 Oct. 2004
Firstpage :
4195
Lastpage :
4199
Abstract :
Image quality In dynamic tomographic imaging can be improved by taking into account the dynamic nature of the object directly in the reconstruction process. In this article we present a theoretical analysis of the time resolution in dynamic CT. Data sets acquired over several full-turns are interpreted as samples of a continuous signal. Consequently data at any time instant can be achieved by interpolation techniques. A n-th order B-spline interpolation approach is proposed. In order to be prepared for motion correction techniques, interpolation is performed in image space in the partial block backprojection framework. In simulation studies the interpolation method is compared with a linear regression technique and a conventional short-scan reconstruction algorithm. The interpolation approach achieves best time resolution at similar noise properties than the conventional short-scan reconstruction. The linear regression algorithm shows significant denoising with detriment to time resolution
Keywords :
computerised tomography; image denoising; image motion analysis; image reconstruction; interpolation; medical image processing; splines (mathematics); B-spline interpolation approach; continuous signal; denoising; dynamic computed tomography; dynamic tomographic imaging; image quality; image space; linear regression algorithm; linear regression technique; motion correction techniques; partial block backprojection framework; perfusion studies; short-scan reconstruction algorithm; time resolution; Computed tomography; Image quality; Image reconstruction; Interpolation; Linear regression; Noise reduction; Reconstruction algorithms; Signal analysis; Signal resolution; Spline;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Nuclear Science Symposium Conference Record, 2004 IEEE
Conference_Location :
Rome
ISSN :
1082-3654
Print_ISBN :
0-7803-8700-7
Electronic_ISBN :
1082-3654
Type :
conf
DOI :
10.1109/NSSMIC.2004.1466816
Filename :
1466816
Link To Document :
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