1. A method for automatically determining a thickness of a wall of an artery of a subject, comprising: obtaining an ultrasound video of the wall of the artery of the subject, the ultrasound video comprising a plurality of frames of video; obtaining a corresponding electrocardiogram (ECG) signal from the subject; selecting a subset of the plurality of frames of the video based on the corresponding (ECG) signal; locating automatically a region of interest (ROI) in each frame of the subset of the plurality of frames of the video using a machine-based artificial neural network; and measuring automatically a thickness of the wall of the artery in each ROI using the machine-based artificial neural network.