Determining blood flow direction from short neurovascular surgical microscope videos.
Healthc Technol Lett
; 6(6): 191-196, 2019 Dec.
Article
em En
| MEDLINE
| ID: mdl-32038856
ABSTRACT
Neurovascular surgery aims to repair diseased or damaged blood vessels in the brain or spine. There are numerous procedures that fall under this category, and in all of them, the direction of blood flow through these vessels is crucial information. Current methods to determine this information intraoperatively include static pre-operative images combined with augmented reality, Doppler ultrasound, and injectable fluorescent dyes. Each of these systems has inherent limitations. This study includes the proposal and preliminary validation of a technique to identify the direction of blood flow through vessels using only video segments of a few seconds acquired from routinely used surgical microscopes. The video is enhanced to reveal subtle colour fluctuations related to blood pulsation, and these rhythmic signals are further analysed in Fourier space to reveal the direction of blood flow. The proposed method was validated using a novel physical phantom and retrospective analysis of surgical videos and demonstrated high accuracy in identifying the direction of blood flow.
Fourier space; augmented reality; biomechanics; biomedical optical imaging; biomedical ultrasonics; blood; blood flow direction; blood pulsation; blood vessels; bone; brain; damaged blood vessels; diseases; haemodynamics; image segmentation; medical image processing; neurophysiology; neurovascular surgery; phantoms; physical phantom; routinely used surgical microscopes; short neurovascular surgical microscope videos; static pre-operative images; subtle colour fluctuations; surgery; surgical videos; video segments
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Base de dados:
MEDLINE
Idioma:
En
Revista:
Healthc Technol Lett
Ano de publicação:
2019
Tipo de documento:
Article
País de afiliação:
Canadá