| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an automated method for assuring quality of an image (QA) and controlling the quality of the image (QC) in an X-rays digital radiographic apparatus system, and in addition, specifically, a simple and high speed method for quantitatively measuring characteristic values of a computer radiation beam(CR) imaging system based on a stored fluorescent substance and a direct radiation beam(DR) imaging system based on a direct digital flat panel detector. SOLUTION: A phantom used for measuring a parameter in the digital radiographic apparatus system comprises an approximately rectangular member as an X-ray attenuation material, a primary landmark rectangular arrangement related to the above described member being used for measuring a geometrical shape, a set of regions related to the central position of the above described member for measuring radiation linearity and accuracy, and a set of sharp angular edge part among the above described regions for measuring a modulation transmitting function.</p> |
