Abstract
Multiscale extraction of the subtlest signs of hypodensity, which were often undetected in standard CT scan review was the subject of our research. Proposed method is as follows: evidence-based description of hypodense changes, the investigation of hypodensity across scales, basing on a set of over 20 hyperacute stroke exams, the improvement of wavelet-based display of ischemic stroke. Considered problems were: –extension of the brain tissues for marginal and missing space after deskulling and segmenting of unusual areas; –best basis selection;–non-perfect reconstruction across scales as an extraction of hypo-attenuating tendency. Increased visibility of hypodense signs on CT scans performed in patients with hyperacute stroke was noticed in subjective rating. In opinion of radiologists and image processing experts, enhanced perception of hypodense area was noticed for all test exams. The rate of unique, clear and doubtless extraction of hypodense area was 92% in 13 tested cases of hyperacute ischemic stroke.
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References
Tomura, N., Uemura, K., et al.: Early CT finding in cerebral infarction. Radiology 168, 463–467 (1988)
Bozzao, L., Bastianello, S., et al.: Correlation of angiographic and sequential CT findings in patients with evolving cerebral infarction. AJNR Am. J. Neuroradiol. 10, 1215–1222 (1989)
von Kummer, R.: The impact of CT on acute stroke treatment. Book chapter (draft) (Dec. 2005)
von Kummer, R., Allen, K.L., et al.: Acute stroke: usefulness of early CT findings before thrombolytic therapy. Radiology 205, 327–333 (1997)
Schuier, F.J., Hossmann, K.A.: Experimental brain infarcts in cats. II. Ischemic brain edema. Stroke 6, 593–602 (1980)
Dzialowski, I., Weber, J., et al.: Brain tissue water uptake after middle cerebral artery occlusion assessed with CT. J. Neuroimaging 14, 42–48 (2004)
Bendszus, M., et al.: Improved CT diagnosis of acute middle cerebral artery territory infarcts with density-difference analysis. Neuroradiology 39(2), 127–131 (1997)
European guidelines in quality criteria for computed tomography. Report EUR 16262, Office for Official Publications of the European Communities, Brussels (1999)
Hammond, D.K., Simoncelli, E.P.: Nonlinear image representation via local multiscale orientation. Courant Institute Technical Report, TR2005–875 (2005)
Bonnier, N., Simoncelli, E.P.: Locally adaptive multiscale contrast optimization. In: Proc. IEEE ICIP, vol. 2, pp. 1001–1004 (2005)
Starck, J.L., et al.: Gray and color image contrast enhancement by the curvelet transform. IEEE Trans. Image Proc. 12(6), 706–717 (2003)
Fayad, L.M., Jin, Y., et al.: Chest CT window settings with multiscale adaptive histogram equalization: pilot study. Radiology 223, 845–852 (2002)
Przelaskowski, A., et al.: Improved early stroke detection: wavelet-based perception enhancement of computerized tomography exams. Comp. Biol. Med. 37, 524–533 (2007)
Antonini, M., et al.: Image coding using wavelet transform. IEEE Trans. Image Proc. 1(2), 205–220 (1992)
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Przelaskowski, A., Bargiel, P., Sklinda, K., Zwierzynska, E. (2007). Ischemic Stroke Modeling: Multiscale Extraction of Hypodense Signs. In: An, A., Stefanowski, J., Ramanna, S., Butz, C.J., Pedrycz, W., Wang, G. (eds) Rough Sets, Fuzzy Sets, Data Mining and Granular Computing. RSFDGrC 2007. Lecture Notes in Computer Science(), vol 4482. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-72530-5_20
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DOI: https://doi.org/10.1007/978-3-540-72530-5_20
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