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Pregled bibliografske jedinice broj: 203860

Denoising of Time-Density Data in Digital Subtraction Angiography


Bogunović, Hrvoje; Lončarić, Sven
Denoising of Time-Density Data in Digital Subtraction Angiography // Proceedings of the 14th Scandinavian Conference on Image Analysis / Kalviainen, Heikki ; Parkkinen, Jussi ; Kaarna, Arto (ur.).
Berlin: Springer-Verlag, 2005. str. 1157-1166 (poster, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)


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Naslov
Denoising of Time-Density Data in Digital Subtraction Angiography

Autori
Bogunović, Hrvoje ; Lončarić, Sven

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the 14th Scandinavian Conference on Image Analysis / Kalviainen, Heikki ; Parkkinen, Jussi ; Kaarna, Arto - Berlin : Springer-Verlag, 2005, 1157-1166

Skup
14th Scandinavian Conference on Image Analysis

Mjesto i datum
Joensuu, Finska, 19-22.06.2005

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
denoising; wavelet shrinkage; perfusion estimation; digital subtraction angiography

Sažetak
In this paper we present methods for removing the noise from a time sequence of digitally subtracted x-ray angiographic images. By observing the contrast agent propagation profile in a region of the angiogram one can estimate the time of arrival of that agent. Due to the large level of noise, it is difficult to detect the moment of the contrast agent arrival accurately. Hence denoising is required. Two methods are presented. The first one is based on 1D Wiener filtering of the time data. Wiener filter was chosen because it presents the optimal linear filter in the least-squares sense. The other method is based on 3D wavelet denoising via wavelet shrinkage technique, which is a nonlinear method. Since it is based on 3D wavelet basis it can perform denoising simultaneously in the spatial as well as in the time dimension of the image sequence. Wavelet based denoising proved to be superior but computationally more demanding. The experiments were performed on a sequence of cerebral angiograms.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika, Računarstvo



POVEZANOST RADA


Projekti:
0036028
0036058

Ustanove:
Fakultet elektrotehnike i računarstva, Zagreb

Profili:

Avatar Url Hrvoje Bogunović (autor)

Avatar Url Sven Lončarić (autor)


Citiraj ovu publikaciju:

Bogunović, Hrvoje; Lončarić, Sven
Denoising of Time-Density Data in Digital Subtraction Angiography // Proceedings of the 14th Scandinavian Conference on Image Analysis / Kalviainen, Heikki ; Parkkinen, Jussi ; Kaarna, Arto (ur.).
Berlin: Springer-Verlag, 2005. str. 1157-1166 (poster, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)
Bogunović, H. & Lončarić, S. (2005) Denoising of Time-Density Data in Digital Subtraction Angiography. U: Kalviainen, H., Parkkinen, J. & Kaarna, A. (ur.)Proceedings of the 14th Scandinavian Conference on Image Analysis.
@article{article, year = {2005}, pages = {1157-1166}, keywords = {denoising, wavelet shrinkage, perfusion estimation, digital subtraction angiography}, title = {Denoising of Time-Density Data in Digital Subtraction Angiography}, keyword = {denoising, wavelet shrinkage, perfusion estimation, digital subtraction angiography}, publisher = {Springer-Verlag}, publisherplace = {Joensuu, Finska} }
@article{article, year = {2005}, pages = {1157-1166}, keywords = {denoising, wavelet shrinkage, perfusion estimation, digital subtraction angiography}, title = {Denoising of Time-Density Data in Digital Subtraction Angiography}, keyword = {denoising, wavelet shrinkage, perfusion estimation, digital subtraction angiography}, publisher = {Springer-Verlag}, publisherplace = {Joensuu, Finska} }




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