Harmonic multiresolution estimators for denoising and regularization of SPECT-PET data
Proceedings IEEE International Symposium on Biomedical Imaging - Trang 697-700
Tóm tắt
This paper presents a study on the development of new multiresolution directional analysis tools for texture denoising of medical images. Multiresolution. texture analysis is performed with wavelet packets and brushlet expansions to exploit spatio-temporal coherence and identify persistent anatomical structures while removing uncorrelated noise components. Denoising is performed via thresholding estimators in the transform domain. Denoising performance is evaluated quantitatively on phantom volumes and qualitatively on clinical data sets with SPECT-PET data. We show in this study that these multiresolution directional analysis tools are well adapted to the intrinsic nature of textured data and outperform traditional denoising methods. In the case of spatiotemporal data, we also show that by incorporating the time dimension directly in the analysis, we can bring into play temporal coherence between successive frames to improve denoising performance and enhance moving boundaries and structures.
Từ khóa
#Noise reduction #Image texture analysis #Performance analysis #Image resolution #Image analysis #Biomedical imaging #Wavelet analysis #Wavelet packets #Coherence #Anatomical structureTài liệu tham khảo
10.1006/acha.1997.0208
10.1006/acha.1995.1008
guedon, 2001, Medical application of denoising in wavelet basis, J Biomedical Engineering Department
10.2307/2337118
mallat, 1998, A Wavelet Tour of Signal Processing
angelini, 2001, Spatio-temporal directional analysis of real-time three dimensional cardiac ultrasound, Wavelets in Signal and Image Analysis, 10.1007/978-94-015-9715-9_13
10.1109/ICIP.1998.723556
10.1109/23.632731
hudson, 1994, Accelerated image reconstruction using ordered subsets of projection data, IEEE Transactions on Medical Imaging, 13, 601, 10.1109/42.363108
10.1109/23.681991
10.1109/IEMBS.2000.900676
10.1109/23.775585
10.1109/34.667883
10.1109/NSSMIC.1996.587968
10.1109/TMI.1982.4307558
mclachlan, 1997, The EM Algorithm and Extensions
10.1109/ICPR.2000.903695