Abstract: A method and apparatus designed and constructed to be used as an accessory on X-ray machines when making X-ray pictures on X-ray film of the lower extremities of the human body for the specific purpose of accurately measuring the long bones and the joint spacing. Also the analyzationand comparing of the long bones and joint spacings with each other.The radiographic attachment apparatus is a separate unit from the X-ray machine and is not attached as a part thereof, but used as an accessory by merely placing the apparatus in the center of the X-ray table under the lower extremities of the body when making the X-ray pictures.