TY - JOUR
T1 - Vessel enhancement in digital X-ray angiographic sequences by temporal statistical learning
AU - Lassó, András
AU - Trucco, Emanuele
PY - 2005/6
Y1 - 2005/6
N2 - In this paper, we present a vessel enhancement method, SVM temporal filtering (STF), for X-ray angiographic (XA) images using Support Vector Machine (SVM). We show that the linear SVM applied to vessel enhancement can be regarded as a matched linear filter optimizing the contrast-to-noise ratio in XA images. We propose a non-linear kernel function for the SVM leading to good enhancement with noisy, varying grey-level dynamics at vessel pixels. One key advantage over the matched filters is that an optimal filter is learnt from images, not estimated at design stage. Results on clinical XA images show that learning-based enhancement achieves better results compared to simple subtraction and other image stacking methods. © 2005 Elsevier Ltd. All rights reserved.
AB - In this paper, we present a vessel enhancement method, SVM temporal filtering (STF), for X-ray angiographic (XA) images using Support Vector Machine (SVM). We show that the linear SVM applied to vessel enhancement can be regarded as a matched linear filter optimizing the contrast-to-noise ratio in XA images. We propose a non-linear kernel function for the SVM leading to good enhancement with noisy, varying grey-level dynamics at vessel pixels. One key advantage over the matched filters is that an optimal filter is learnt from images, not estimated at design stage. Results on clinical XA images show that learning-based enhancement achieves better results compared to simple subtraction and other image stacking methods. © 2005 Elsevier Ltd. All rights reserved.
KW - Image enhancement
KW - Learning systems
KW - Matched filters
KW - Support vector machines
KW - X-ray angiography
UR - http://www.scopus.com/inward/record.url?scp=19744371376&partnerID=8YFLogxK
U2 - 10.1016/j.compmedimag.2005.02.002
DO - 10.1016/j.compmedimag.2005.02.002
M3 - Article
C2 - 15893453
SN - 1879-0771
VL - 29
SP - 343
EP - 355
JO - Computerized Medical Imaging and Graphics
JF - Computerized Medical Imaging and Graphics
IS - 5
ER -