數位化減除放射線攝影術(Digital subtraction radiography;DSR)是一種電腦輔助的攝影分析工具,在臨床牙科上有許多潛在的應用,這個系統強調的是,藉由移除一對放射線影像中相同的解剖構造而將其中的差異顯現出來。本文將探討DSR的發展沿革、原理、技術及其在牙周病學上的應用,以作為臨床使用上的參考。
Digital subtraction radiography is a computer-aided radiographic analysis tool which has a wide range of potential applications in clinical dentistry. The system emphasizes differences between pairs of radiographs by removing information common to both (structural noise). The purpose of this article is to discuss the developing history, principle, techniques and the clinical application of digital subtraction radiography.