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目的 :探讨DDR (DerectDigitiedRediography)成像的空间分辨率。材料与方法 :美国HOLOGIC公司的直接数字化摄影系统 ;瑞士R -1W线对分辨率卡 (LP/mm)。结果 :分辨率达 4 0 0LP/mm。结论 :DDR成像的空间分辨率不如传统的屏片摄影
Objective: To explore the spatial resolution of Derect Digitized Imaging (DDR) imaging. Materials and Methods: direct digital photography system from HOLOGIC in the United States; Swiss R-1W line-to-line resolution card (LP / mm). Results: resolution of 400LP / mm. Conclusion: The spatial resolution of DDR imaging is inferior to that of conventional screen photography