Figure 5From: Spatial normalization of array-CGH dataEvidence of local spatial bias on foreground and background raw signals on a breast cancer array. Log-ratios of the four raw signals of a breast cancer array: local spatial biases are easier to detect on a Cy3 background. (a) Test foreground; (b) test background; (c) reference foreground; (d) reference background. Gray-scale level is proportional to signal value.Back to article page