Figure 9From: Automatic detection of the carotid artery boundary on cross-sectional MR image sequences using a circle model guided dynamic programming The comparison (signed and unsigned relative error) between manual drawing and automated method applied on different noise degraded images. The noise level is represented by SNR (dB). The 20 dB means the signal intensity is 10 times the noise intensity. The right one without SNR is the raw image (without artificial noises).Back to article page