A Computer-Aided Diagnosis (CAD) apparatus may include: an image receiver configured to receive consecutive medical images； an image analyzer configured to divide the received consecutive medical images into sequence groups by a predetermined number, separate images in a sequence group, among the sequence groups, into a first image group and a second image group, and perform parallel analysis on the first image group and the second image group； and a display configured to output on a screen a result of the analyzing of the first image group and the second image group.
