前言： 目的：评价双能量减影在肺结核结节诊断中的应用价值。
Objective:To evaluate the value in detecting pulmonary tubercle(PT) on dual-energy subtraction(DES) with direct digital radiography (DDR).
目的评价数字化双能量减影技术在肺结节及结节内钙化诊断中的临床价值。
Objective To explore the clinical value of digital radiography with dual-energy subtraction in diagnosis of coronary artery and valve calcification.
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