Adaptive Color Gain for Vena Contracta Quantification in Valvular Regurgitation.

Autor:	Kozlowski P; GE Vingmed Ultrasound, Oslo, Norway; Department of Informatics, University of Oslo, Oslo, Norway. Electronic address: pawel.kozlowski@outlook.com., Rodriguez-Molares A; Norwegian University of Science and Technology, Trondheim, Norway., Tangen TA; GE Vingmed Ultrasound, Oslo, Norway., Kristoffersen K; GE Vingmed Ultrasound, Oslo, Norway., Torp H; Norwegian University of Science and Technology, Trondheim, Norway., Gerard O; GE Vingmed Ultrasound, Oslo, Norway., Samset E; GE Vingmed Ultrasound, Oslo, Norway; Department of Informatics, University of Oslo, Oslo, Norway; Department of Cardiology, Center for Cardiological Innovation, Oslo University Hospital, Rikshospitalet, Norway.
Jazyk:	angličtina
Zdroj:	Ultrasound in medicine & biology [Ultrasound Med Biol] 2018 Aug; Vol. 44 (8), pp. 1770-1777. Date of Electronic Publication: 2018 May 18.
DOI:	10.1016/j.ultrasmedbio.2018.04.002
Abstrakt:	Severe valvular regurgitation can lead to pulmonary hypertension, atrial fibrillation and heart failure. Vena contracta width is used to estimate the severity of the regurgitation. Parameters affecting visualization of color Doppler have a significant impact on the measurement. We propose a data-driven method for automated adjustment of color gain based on the peak power of the color Doppler signal in the vicinity of the vena contracta. A linear regression model trained on the peak power was used to predict the orifice diameter. According to our study, the color gain should be set to about 6 dB above where color Doppler data completely disappears from the image. Based on our method, orifices with reference diameters of 4, 6.5 and 8.5 mm were estimated with relative diameter errors within 18%, 12% and 14%, respectively. (Copyright © 2018 World Federation for Ultrasound in Medicine and Biology. Published by Elsevier Inc. All rights reserved.)
Databáze:	MEDLINE
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