| 摘要 |
<p>The invention relates to devices for testing and evaluation of characteristics of information and recognizing systems in particular imaging systems. It may be used for testing of medical and industrial diagnostic systems. The test phantom for information systems is divided into several areas, being identified on the output image or on the informative field of the system. The areas are united in one or several groups. Each of groups comprises identical test elements, thereby their maximum quantity is less than the number of said areas included in the group. All of these test elements are identical within one group, but they can be different in various groups. The disposition of test elements may be changed so that their final positions are not known to the examiner but may be determined, and they are arranged so that none of said areas may contain more than one test element. Design of test phantom and the identification of areas on the image of phantom can be executed by various ways. Each test element can be disposed in a flat disc and moved relatively to a plate divided into numbered areas, or located eccentrically in a separated disc which can be displaced within appropriate group of identified areas independently from other ones. The operative statistical method of using test phantom provide the opportunity to obtain probabilities of true, true-positive and true-negative answers of operator.</p> |
