Disclosed herein are a medical imaging apparatus including a scanner configured to scan an object, an image generator configured to generate a monitoring image to monitor variations in brightness of a region of interest (ROI) of the object, a controller configured to determine a peak of brightness in the monitoring image, and a user interface configured to display the monitoring image and an indicator of the determined peak, and a method of controlling the same. According to the medical imaging apparatus and the method of controlling the same, over-injection of a contrast agent into the object may be prevented while a medical image is acquired, and an image may be obtained when the contrast agent is in an optimum state in consideration of various environmental factors. Accordingly, lesions and diseases may be more accurately determined and interpreted by using the medical image.
