| 摘要 |
PROBLEM TO BE SOLVED: To provide an evaluation aid that is capable of being used as a phantom (simulated lesion) in imaging and evaluating a digital X-ray image, and especially make it possible to evaluate, in a lump, digital X-ray images in a plurality of X-ray absorption areas having different X-ray absorption rates.SOLUTION: An evaluation aid 1 used in imaging and evaluating a digital X-ray image includes: a board (tabular body) 2 that has a quadrangle shape in a plan view and has a plurality of areas A to C having different X-ray absorption rates; and clusters 41 to 43 that are provided on the board 2 in association with the areas A to C, respectively, and include a plurality of wires (wire materials) 411 to 416, 420 to 429, and 430 to 439. In the evaluation aid 1, each wire of each of the clusters 41 to 43 is inclined to one side of the board 2. Preferably, each wire of each of the clusters 41 to 43 is inclined at 30-75° to one side of the board 2. |
