Impact of perfusion ROI detection to the quality of CBV perfusion map

Authors

DOI:

https://doi.org/10.15587/2312-8372.2019.182789

Keywords:

dynamic susceptibility contrast magnetic resonance imaging, cerebral blood volume, region of interest, thresholding

Abstract

The object of research in this study is quality of CBV perfusion map, considering detection of perfusion ROI as a key component in processing of dynamic susceptibility contrast magnetic resonance images of a human head. CBV map is generally accepted to be the best among others to evaluate location and size of stroke lesions and angiogenesis of brain tumors. Its poor accuracy can cause failed results for both quantitative measurements and visual assessment of cerebral blood volume.

The impact of perfusion ROI detection on the quality of maps was analyzed through comparison of maps produced from threshold and reference images of the same datasets from 12 patients with cerebrovascular disease. Brain perfusion ROI was placed to exclude low intensity (air and non-brain tissues regions) and high intensity (cerebrospinal fluid regions) pixels. Maps were produced using area under the curve and deconvolution methods.

For both methods compared maps were primarily correlational according to Pearson correlation analysis: r=0.8752 and r=0.8706 for area under the curve and deconvolution, respectively, p<2.2·10-16. In spite of this, for both methods scatter plots had data points associated with missed blood regions and regression lines indicated presence of scale and offset errors for maps produced from threshold images.

Obtained results indicate that thresholding is an ineffective way to detect brain perfusion ROI, which usage can cause degradation of CBV map quality. Perfusion ROI detection should be standardized and accepted into validation protocols of new systems for perfusion data analysis.

Author Biography

Svitlana Alkhimova, National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute», 37, Peremohy ave., Kyiv, Ukraine, 03056

PhD

Department of Biomedical Cybernetics

References

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Published

2019-10-31

How to Cite

Alkhimova, S. (2019). Impact of perfusion ROI detection to the quality of CBV perfusion map. Technology Audit and Production Reserves, 5(2(49), 27–30. https://doi.org/10.15587/2312-8372.2019.182789

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Section

Reports on research projects