Patent ID: 7239733

Claim:
An image display apparatus which displays on a screen a radiographed image of an actual object radiographed by a radiation sensor, comprising: setting means for setting a ratio between a length of the radiographed image and an actual length of the actual object; point display means for displaying two designated points within the radiographed image displayed on the screen, the two designated points corresponding to two points on the actual object; measurement means for measuring a distance between positions of the two designated points; calculation means for calculating, on the basis of the ratio set by said setting means and a measurement value by said measurement means, an actual measurement value of the two points on the actual object corresponding to the measurement value of the distance between the positions of the two designated points on the radiographed image; and value display means for displaying a line which connects the positions of the two designated points, the actual measurement value calculated by said calculation means on the basis of the two designated points and the ratio on the screen, wherein the actual measurement value and the ratio are displayed near the line.