Detekce pulsačních změn průměru tepen v dynamickém ultrazvukovém obraze
Authors:
Martin Sedlář; Vojtěch Mornstein
Authors place of work:
Biofyzikální ústav LF MU, Brno, Česká republika
Published in the journal:
Lékař a technika - Clinician and Technology No. 3, 2013, 43, 10-13
Category:
Original research
Summary
The pulsatile changes of diameter of blood vessels carry important information about mechanical and elastic properties of vessel wall and can be a very useful tool for measurement of functional status and diagnosis of many diseases of the vascular system.
The changes in vessel diameter we assessed in dynamic ultrasound image of femoral artery in longitudinal section. Processing and analysis was performed in Matlab®. From the input movie we created sequence of the images, that we modified by basic image preprocessing methods and methods of mathematical morphology with target to improve the results of detection, eliminate noise and disturbance structures. Time-dependent signal of artery diameter changes we obtained by evaluating brightness profiles, that were leads perpendicular to the vessel wall in all images of sequence.
Our proposed algorithm has emerged as a powerful tool for evaluating the elastic properties of arteries. The disadvantage of algorithm is its strong dependence on suitable acquisition parameters, quality and compression of the input image data.
Keywords:
ultrasound, arteries, elasticity, pulsatile changes
Zdroje
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Štítky
BiomedicineČlánok vyšiel v časopise
The Clinician and Technology Journal
2013 Číslo 3
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