Medical image diagnosis system and control method thereof

A control method of a medical image diagnosis system, comprising:

• setting values of image quality indicator selected by a user regarding multiple types of the image quality indicator to display a medical image as an anchor, and generates a thumbnail image of the medical image based on the anchor as a first thumbnail image;
• causing the display to display the first thumbnail image;
• generating a plurality of thumbnail images as second thumbnail images by respectively increasing or decreasing the multiple types of the image quality indicator from the anchor regarding the medical image;
• causing the display to display the plurality of second thumbnail images;
• allowing the user to select one of the first thumbnail image and the plurality of second thumbnail images, and calculating a new image quality indicator adjusted with a variable step width based on the selected one of the first thumbnail image or the plurality of the second thumbnail images;
• and
• generating a new first thumbnail image by using the values of the image quality indicator corresponding to selected the one of the first thumbnail image and the second thumbnail image selected by the user as a new anchor, causing the display to display a new first thumbnail image, generating a plurality of new second thumbnail images based on the values of the new image quality indicator, and causing the display to display the plurality of new second thumbnail images.