DEVELOPING STRUCTURE AND AN IMPLANTED MEDICAL INSTRUMENT HAVING DEVELOPING STRUCTURE

摘要

A radiopaque structure and an implanted medical instrument having the radiopaque structure. The radiopaque structure includes at least one radiopaque unit, and each radiopaque unit includes at least one radiopaque object. In at least one incidence direction of a light source, all the radiopaque objects in the radiopaque structure are divided into n regions according to the thickness in the incidence direction, and a projection area Sm of m regions of the n regions and an effective thickness dm of the m regions meet Sm - 0.0136(dm)a ‰¥ 0, wherein -0.95 ‰¤a ‰¤ -0.85 and 1 ‰¤m ‰¤n. The radiopaque structure has good or excellent visibility.