Mr. Andreas Brink-Kjær Profile

Andreas Brink-Kjær

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Proceedings Article | 13 March 2017 Paper

Automatic segmentation of vessels in in-vivo ultrasound scans

Philip Tamimi-Sarnikowski, Andreas Brink-Kjær, Ramin Moshavegh, Jørgen Arendt Jensen

Proceedings Volume 10137, 101371P (2017) https://doi.org/10.1117/12.2254101

KEYWORDS: Image segmentation, Ultrasonography, Image processing algorithms and systems, Transducers, Scanners, Doppler effect, Arteries, Vascular diseases, In vivo imaging

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Ultrasound has become highly popular to monitor atherosclerosis, by scanning the carotid artery. The screening involves measuring the thickness of the vessel wall and diameter of the lumen. An automatic segmentation of the vessel lumen, can enable the determination of lumen diameter. This paper presents a fully automatic segmentation algorithm, for robustly segmenting the vessel lumen in longitudinal B-mode ultrasound images. The automatic segmentation is performed using a combination of B-mode and power Doppler images. The proposed algorithm includes a series of preprocessing steps, and performs a vessel segmentation by use of the marker-controlled watershed transform. The ultrasound images used in the study were acquired using the bk3000 ultrasound scanner (BK Ultrasound, Herlev, Denmark) with two transducers "8L2 Linear" and "10L2w Wide Linear" (BK Ultrasound, Herlev, Denmark). The algorithm was evaluated empirically and applied to a dataset of in-vivo 1770 images recorded from 8 healthy subjects. The segmentation results were compared to manual delineation performed by two experienced users. The results showed a sensitivity and specificity of 90.41±11.2 % and 97.93±5.7% (mean±standard deviation), respectively. The amount of overlap of segmentation and manual segmentation, was measured by the Dice similarity coefficient, which was 91.25±11.6%. The empirical results demonstrated the feasibility of segmenting the vessel lumen in ultrasound scans using a fully automatic algorithm.

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