Display method of test pattern and medical image display apparatus

摘要

A display method of a test pattern makes a display unit of a medical image display apparatus display one of a plurality of test patterns for correcting a display gradation characteristic of the medical image display apparatus on one screen in a way of changing the test pattern every screen so that the test pattern displayed on each changed screen is displayed at a predetermined ratio to a size of a display screen and a luminance level of a background region of the test pattern is displayed at a different luminance level every change of the screen.